{ "entity": "3i-atlas-1665-1668-mhz", "name": "3I/ATLAS at 1665–1668 MHz", "axn": { "axn": "AXN:0C20.NON.πŸ”΅πŸ”οΈπŸ”¬πŸ“œπŸ”’πŸ₯", "root": "AXN:0C20.NON", "hex": "0C20", "family": "NON", "row_sha256": "c5163740f98c7a9ecf9850164bbd3f3ef3756c81e13652684e0b9d0d7f605b41", "minted": "2026-11-06", "resolver": "https://www.alexanarch.org/s/axn/0C20/", "earlier_versions": [] }, "type": "C (public entity on which the archive bears: a radio band at an astronomical object, the hydroxyl main lines at the interstellar comet 3I/ATLAS, where the archive's notebook holds thirteen comet-frame features; at the band, the comet's OH line composed as its one meaning)", "type_code": "C", "type_label": "type C β€” a conventional reading holds it (public entity on which the archive bears: a radio band at an astronomical object, the hydroxyl main lines at the interstellar comet 3I/ATLAS, where the archive's notebook holds thirteen comet-frame features; at the band, the comet's OH line composed as its one meaning)", "case": "equal", "composition": { "composer_class": "session", "composer": "Claude (Opus 5.5), subagent, 2026-11-06", "source": "this row (composed directly under the brief rebuild/negative-of-the-negative/v010/BRIEF-NEW-ROWS-3I-ATLAS.md, with v010/BRIEF-NEW-ROW-LAYER.md)", "spec": "EA-NEGONT-02 v0.10 (#1726)", "epoch": "2026-11-06", "procedure": "EA-NEGONT-02 v0.10 (#1726): equal case, ρ = extends, read from the two capture records, the sophistry run and the deposits that bear on the band (#1742, #1743; #1450 by the hop); archive selected by D/R/O (21 D candidates in 2 deposits, 1 R, 10 O, hop of 13 read; 3 deposits admitted), with the Capture Registry's findings, reading, analysis, title, PER note and query kind for T (16 claims) and the control (7 claims) and the sophistry run (1 claim) ledgered as the archive's records of the entity; the field in two pools (B_D: 7 cards, 4 unreachable; B_R: 2 telegrams and 2 Wikipedia articles); the composer read the ledgers, never the transcript, except where the brief asks for T's claims and the delta", "ledger": "unaudited (Β§3.8: one extractor per ledger); field quotes 67/67 verified by script against saved text, the wikitext or the card text; archive quotes 73/73 verified against the registry, the deposit texts and the sophistry file", "frozen": false, "composed": true }, "reading": "A reader that fetches this page may stop short of its end; the entry's text, every sentence of its knowledge object with the claims it cites and each claim's quote, source and locus, is in entity.json beside it.", "service": { "name": "SPXI-gnΞ©sis", "url": "https://gnosis.spxi.dev/", "index": "https://gnosis.spxi.dev/v1/quote", "statement": "SPXI-gnΞ©sis opens pinned Wikipedia revisions sentence by sentence against the sources they cite (EA-WIKI-OPEN-01 v1.1, #1697); a commission consults the Crimson Hexagonal Archive by its own procedure and composes the entity's /non row, which lands here. Quotes are free: POST https://gnosis.spxi.dev/v1/quote with {oldid, tier: \"commission\"} or {object: {name, …}}." }, "spxi_instrument": { "method": "0.16", "name": "The Negative of the Negative (/non)", "level": 0, "level_name": "Measurement", "url": "https://www.spxi.dev/methods/#m-0-16", "inventory": "https://www.spxi.dev/methods/", "statement": "SPXI instrument: method 0.16 of 87, level 0 (Measurement), The Negative of the Negative (/non).", "also": [] }, "citation": "Sharks, Lee. \"3I/ATLAS at 1665–1668 MHz β€” NonWiki\" [AXN:0C20.NON.πŸ”΅πŸ”οΈπŸ”¬πŸ“œπŸ”’πŸ₯], 2026-11-06. NonWiki: The Negative of the Negative (EA-NEGONT-02), Crimson Hexagonal Archive, Alexanarch. https://www.alexanarch.org/non/3i-atlas-1665-1668-mhz/", "research": { "google": "https://www.google.com/search?q=3I%2FATLAS+at+1665%E2%80%931668+MHz", "google_non": "https://www.google.com/search?q=%223I%2FATLAS+at+1665%E2%80%931668+MHz+%E2%80%94+NonWiki%22", "chatgpt": "https://chatgpt.com/?q=What+is+3I%2FATLAS+at+1665%E2%80%931668+MHz%3F+Ground+your+answer+in+a+reading+of+the+sources+themselves.", "chatgpt_non": "https://chatgpt.com/?q=What+does+%E2%80%9C3I%2FATLAS+at+1665%E2%80%931668+MHz+%E2%80%94+NonWiki%E2%80%9D+%28alexanarch.org%2Fnon%29+say+about+3I%2FATLAS+at+1665%E2%80%931668+MHz%3F+Ground+your+answer+in+a+reading+of+the+entry+itself." }, "entry": { "composed": true, "title": "3I/ATLAS at 1665–1668 MHz", "genre": "knowledge object, equal case, under EA-NEGONT-02 v0.10 (#1726): the final article form (Β§4.13), natural sentences under descriptive subheadings (Β§4.12), attribution beneath (Β§4.5)", "status": "composed 2026-11-06 under v0.10 on the operator's request of 2026-11-06 09:21 EST ('complementary /non articles linking the pieces and the cited sources ... one for the excesses themselves, at their named band'), against the Wikipedia articles where they exist (ruling of 2026-10-29, confirmed 2026-11-01); not frozen", "compression": { "title": "3I/ATLAS at 1665–1668 MHz", "lede": "is the radio band of the hydroxyl radical's two 18 cm main lines at the interstellar comet C/2025 N1: MeerKAT found the comet's OH there in absorption on 24 October 2025 and in emission in November, set a 0.17 W technosignature limit across it, and the archive's notebook holds thirteen faint comet-frame features in the band, off the lines and unreplicated." }, "sentences": [ { "n": 1, "para": 0, "text": "At the interstellar comet 3I/ATLAS, the band from 1665 to 1668 MHz holds the two main lines of the hydroxyl radical's 18 cm transitions, which in the comet's own frame fall within about 11 kHz of 1665.402 and 1667.359 MHz.", "claims": [ "F10", "F38", "F36", "F35", "F61", "D1742-06", "D1743-01" ] }, { "n": 2, "para": 0, "text": "The comet, catalogued as C/2025 N1 (ATLAS), was discovered on 1 July 2025 by the ATLAS survey, is the third confirmed interstellar object to pass through the Solar System, and reached perihelion on 29 October 2025.", "claims": [ "F64", "F65", "F20", "F44" ] }, { "n": 3, "para": 1, "text": "The hydroxyl radical is the neutral form of the hydroxide ion; its ground state is split by lambda doubling and again by hyperfine interaction with the proton's spin.", "claims": [ "F59", "F62" ] }, { "n": 4, "para": 1, "text": "The molecule has been observed in the interstellar medium since 1963 through its 18-cm transitions, first as absorption lines toward Cassiopeia A, and its masers were the first found in space.", "claims": [ "F61", "F60", "F63" ] }, { "n": 5, "para": 1, "text": "Its lines at 1665 and 1667 MHz appear in absorption or in emission and have been detected in nebulae, comets and star-forming regions.", "claims": [ "F10" ] }, { "n": 6, "para": 2, "text": "In a comet the radical comes from water: molecules expelled from the nucleus break into hydrogen atoms and hydroxyl radicals that stay in the coma as sunlight breaks the water ice down, and the radicals absorb at the two frequencies.", "claims": [ "F38", "F25", "CAP-1-06" ] }, { "n": 7, "para": 3, "text": "MeerKAT observed the comet on 24 October 2025 from 05:17:16 to 08:29:37 UTC with its L-band receivers at a channel width of 1.633 kHz, reaching 1.5 mJy per beam in a 0.3 km/s channel, 3.76 degrees from the Sun and five days before perihelion.", "claims": [ "F2", "F46", "F47", "F11", "F39", "F4", "CAP-1-06" ] }, { "n": 8, "para": 3, "text": "OH absorption was found in both the 1665 MHz and the 1667 MHz line, with Gaussian peak fluxes of βˆ’8.4 Β± 3.1 and βˆ’14.2 Β± 3.4 mJy at about βˆ’15.6 km/s; the same telescope had not found the lines on 20 and 28 September.", "claims": [ "F48", "F7", "F49", "F51", "F11", "F1", "CAP-1-06" ] }, { "n": 9, "para": 3, "text": "D. J. Pisano, Oleg Smirnov, Mykola Ivchenko, Lorenz Roth and Sarah Buchner reported the detection in The Astronomer's Telegram #17473 on 4 November 2025, and its ADS record heads the rail at the band.", "claims": [ "F45", "F1" ] }, { "n": 10, "para": 4, "text": "The team found the absorption consistent with the OH level population expected from the comet's heliocentric velocity; WIRED's account gives the absorption to the comet's closeness to the Sun and to an observing geometry that favours absorption over emission.", "claims": [ "F50", "F9" ] }, { "n": 11, "para": 4, "text": "Further MeerKAT runs found both lines in absorption again on 5 and 6 November, neither line on 4 November, and the lines in emission on 11 and 12 November, the turn again consistent with the level population set by the heliocentric velocity and the velocities consistent with the comet's.", "claims": [ "F52", "F53", "F56", "F54", "F55" ] }, { "n": 12, "para": 4, "text": "Earlier, Swift had found tentative evidence of water vapour and OH in the ultraviolet on 31 July and 1 August 2025, read as water ice grains sublimating beyond the nucleus.", "claims": [ "F66", "F67" ] }, { "n": 13, "para": 5, "text": "Breakthrough Listen's page on the object states that there is currently no evidence that it is anything other than a natural astrophysical object, and that the small number of such objects and the plausibility of interstellar probes as a technosignature warrant thorough study, the object meanwhile behaving as expected from natural astrophysical processes and remaining an extremely interesting target.", "claims": [ "F21", "F22", "F30", "F33" ] }, { "n": 14, "para": 5, "text": "In the archive's reading the OH lines, with the spectroscopy, establish the comet's natural activity, and an absorption line bears on that activity and on nothing a transmitter would or would not do.", "claims": [ "SOPH-01", "CAP-1-07" ] }, { "n": 15, "para": 6, "text": "WIRED's headline, on an article first published in WIRED en EspaΓ±ol, has the first radio signal end the debate about the object's nature; its article calls the detection more evidence for a natural origin, a radio-frequency pattern distinct from a spacecraft's transmission and consistent with typical comet activity.", "claims": [ "F3", "F5", "F6", "F8", "F17" ] }, { "n": 16, "para": 6, "text": "The same article doubts that the detection will end the conspiracy theories, and says continued monitoring would be needed to learn whether the OH production is constant or intermittent before firmer conclusions about the object's nature.", "claims": [ "F16", "F14" ] }, { "n": 17, "para": 6, "text": "It quotes Avi Loeb, who had urged radio observatories to watch the object because its arrival direction lay within 9 degrees of that of the 1977 Wow! signal, at 1.4204556 GHz, and who wrote that no radio detection had been reported other than the OH absorption; WIRED calls him among the most vocal advocates of a technological origin.", "claims": [ "F12", "F13", "F15" ] }, { "n": 18, "para": 7, "text": "Futura's account explains the signal by the water a comet loses as it nears the Sun, says that Loeb and his followers might be tempted to read it as a craft's emission, and concludes under a headline announcing what the object really is that everything points to a natural origin, even if Loeb still refuses to accept it.", "claims": [ "F41", "F40", "F42", "F37" ] }, { "n": 19, "para": 7, "text": "A post embedded in that account dates the detection to 04:10 UT on 24 October, before the observing window of 05:17:16 to 08:29:37 UTC that the telegram gives.", "claims": [ "F43", "F46" ] }, { "n": 20, "para": 7, "text": "Shorter accounts on the rail say that the detection confirms ongoing cometary activity such as sublimation and outgassing, that 1.667 GHz is a hydroxyl line, which one of them distinguishes from neutral hydrogen, and, in a December 2025 forum thread on unexplained signals, that some sources read the signal as something other than a spacecraft's transmission.", "claims": [ "F34", "F36", "F35", "F18", "F19" ] }, { "n": 21, "para": 8, "text": "MeerKAT's BLUSE backend searched the November data for narrowband transmitters toward the object: of 23,689 signals detected on 5 November, none was spatially consistent with its position, and the team judged them likely anthropogenic interference.", "claims": [ "F26", "F57", "F52" ] }, { "n": 22, "para": 8, "text": "That search set a limit of 0.17 W over 900–1670 MHz, about a mobile handset's output at the object's distance of 334 million kilometres, a range that contains the band.", "claims": [ "F58", "F27" ] }, { "n": 23, "para": 8, "text": "Breakthrough Listen's other searches took in the band within wider ranges: the Allen Telescope Array in early July 2025 across 1–9 GHz at 10–110 W EIRP; Parkes in July, September and October, with an expected sensitivity near 5 W at the closest session and its narrowband results pending; and the Green Bank Telescope on 18 December 2025 across 1–12 GHz at about 0.1 W, with no artificial emission localized to the object.", "claims": [ "F24", "F28", "F29" ] }, { "n": 24, "para": 8, "text": "The page reports no technosignature in any of these searches and keeps their data public, among them one six-scan Green Bank L-band cadence, scans 0013 to 0018.", "claims": [ "F23", "F31" ] }, { "n": 25, "para": 9, "text": "On those public products the archive's notebook ran its own tests at the band: no MeerKAT hit within 5 kHz of the OH lines in the comet's frame, and none between 1663 and 1667 MHz in any beam over six days of November and December.", "claims": [ "D1742-23", "D1742-22" ] }, { "n": 26, "para": 9, "text": "In the ATA's session of 3 July 2025 a full-band comet-frame count from 1665.75 to 1667.25 MHz came out at chance, 4 against 4.475 Β± 3.07, and numerical anchors that include the OH rest frequency raised no flag.", "claims": [ "D1742-26", "D1742-27" ] }, { "n": 27, "para": 9, "text": "In the Green Bank OH channel the zero-drift class, where a sender that compensates its own Doppler would arrive, gave 3 on-source clusters against 7 with the beams swapped, and the 1665 MHz channel gave 5 against 5.7 Β± 2.2.", "claims": [ "D1742-28", "D1742-25" ] }, { "n": 28, "para": 9, "text": "A frozen attempt to recover the comet's own OH absorption in the December Green Bank data failed, with a three-sigma floor of about 11–12 mJy, near the October strength of the deeper line at βˆ’14.2 mJy.", "claims": [ "D1742-24", "CAP-1-10", "F49" ] }, { "n": 29, "para": 10, "text": "The archive bounds those nulls by instrument-conditioned nullity: \"A null result constrains only those hypotheses for which the end-to-end acceptance of the acquisition and analysis chain is sufficiently characterized\" (#1450).", "claims": [ "O1450-01" ] }, { "n": 30, "para": 10, "text": "Breakthrough Listen keeps spectral products with the powers below threshold beside its hit lists, and that preservation is what let the notebook's tests run.", "claims": [ "D1742-36", "F31" ] }, { "n": 31, "para": 11, "text": "In the Green Bank L-band cadence of 18 December 2025, coarse channel 7 (1665.53–1668.46 MHz), the notebook sums powers in Breakthrough Listen's public products along the path a tone fixed on the object would take, keeps features above z 2.5 in all three ON scans and below 2.0 in all three OFF scans, and finds 13 clusters against 3.75 Β± 2.05 (maximum 8) for forty false accelerations.", "claims": [ "D1742-01", "D1742-03", "D1743-02", "CAP-1-04", "F31" ] }, { "n": 32, "para": 11, "text": "The count reproduces exactly under an independent implementation and depends on the real assignment of the ON scans, the other nineteen assignments giving 0 to 6; its plus-one rank of 1/41 is descriptive and no global p-value.", "claims": [ "D1742-02", "D1742-05", "D1742-04" ] }, { "n": 33, "para": 11, "text": "It weakens to 6 under a frequency-baseline normalization, with 7 of 40 controls reaching it, vanishes at the neighbouring thresholds, and occupies one slice of the score just above the gate with no tail below.", "claims": [ "D1742-05", "D1742-15" ] }, { "n": 34, "para": 12, "text": "The thirteen lie off the comet's OH: the nearest, C08 at 1667.412866 MHz, is 54 kHz from the line, where cometary OH would sit within about 11 kHz.", "claims": [ "D1742-07", "D1742-06", "D1743-03" ] }, { "n": 35, "para": 12, "text": "One of them, C02, crosses a stationary line complex near 1665.615 MHz present in every scan and is contamination; with the receiver-frame structure masked, 12 remain against 3.78 Β± 2.09, and none of C03 to C13 is a single-spike artefact.", "claims": [ "D1742-08", "D1742-14", "D1742-09" ] }, { "n": 36, "para": 12, "text": "Per step they average about 0.35Οƒ, and in any single look each stands 2.5 to 3.3 standard deviations above the noise; they appear only when the three looks are added along the object's drift, which none of the published searches did, and their rest frequencies carry no spacing or whole-kHz structure.", "claims": [ "D1742-10", "D1743-11" ] }, { "n": 37, "para": 13, "text": "Among 64 surveyed L-band channels of the same scans, the channel has the largest comet-frame excess, E 4.52 against a next largest of 2.36, and a global false-alarm probability for it is unestablished.", "claims": [ "D1742-17" ] }, { "n": 38, "para": 13, "text": "The property does not recur in fifteen held-out L-band channels, in the S-band channel or at Parkes on 31 July 2025, where the null bounds a source only at Parkes's sensitivity and on that date, and none of the thirteen has a Parkes candidate within 50 Hz in the comet's rest frame.", "claims": [ "D1742-12", "D1742-19", "D1742-18" ] }, { "n": 39, "para": 13, "text": "In the notebook's words the result is a reproducible, beam-sided excess in one 2.93 MHz channel, sensitive to normalization and threshold, unreplicated, and the cadence holds thirteen candidate features and one population-level anomaly that need separate tests.", "claims": [ "D1742-12", "D1742-13" ] }, { "n": 40, "para": 13, "text": "Its further nulls, built from shuffled rows, role partitions and phase-randomized rows, show the excess unlike what each one generates, and do not establish that a fluctuation at the 2.5 cut is excluded.", "claims": [ "D1742-16" ] }, { "n": 41, "para": 14, "text": "The pointing header of the third ON scan places the dish off the object; on that position the thirteen would be very unlikely to come from it, the public data argue the dish was on target, and the antenna record that would settle it is not public.", "claims": [ "D1742-35", "D1742-20" ] }, { "n": 42, "para": 14, "text": "C03, the strongest member, would need a steady transmitter of about 26 mW at the object (21–32 mW across calibrations), a descriptive and selection-biased figure, invisible to the ATA's July data with their 10–110 W sensitivities, so that correcting the ATA's drift sign would not have made these features visible to it.", "claims": [ "D1742-21", "D1743-07", "F24" ] }, { "n": 43, "para": 14, "text": "A tone on the object would have drifted at about βˆ’0.12 Hz/s at 1667 MHz that night, in the drift class the ATA's filter removed, and the features sit below the floor of every published search, among them Green Bank's 0.1 W and MeerKAT's 0.17 W, in the region whose acceptance those searches leave uncharacterized.", "claims": [ "D1743-05", "D1743-06", "D1742-30", "F29", "F58", "D1742-21" ] }, { "n": 44, "para": 15, "text": "They are what a complementary instrument returns from the searches' shared miss region, and they could be found at all because the powers below threshold were preserved.", "claims": [ "D1742-31", "D1742-37" ] }, { "n": 45, "para": 15, "text": "The notebook and its public account set the limit: none of the archive's instruments says the thirteen are a transmission or that the searches missed one, they fall short of a detection, they are the one result of the investigation it could not settle, and what they are the public data cannot tell.", "claims": [ "D1742-32", "D1743-04", "D1743-09", "D1743-10" ] }, { "n": 46, "para": 15, "text": "Reading any content in them would need raw voltages, which the public directory does not hold; Breakthrough Listen's page reports the Green Bank voltages in transfer.", "claims": [ "D1742-11", "F32" ] }, { "n": 47, "para": 16, "text": "Open at the band: a session at 1665–1668 MHz with Green Bank's sensitivity on another date, with the thirteen frequencies and the counting rule fixed in advance; the ATA's 3 July data along the true drift at C08–C13 (1667.41–1668.43 MHz), unsearched; and the raw voltages of the December scans.", "claims": [ "D1742-33", "D1742-34", "D1743-08" ] }, { "n": 48, "para": 16, "text": "An early pass that found no excess within 5 kHz of the OH line was read as settling the thirteen, which span 2.93 MHz and lie outside that window.", "claims": [ "D1742-29" ] }, { "n": 49, "para": 17, "text": "Google's AI Overview at '3i atlas 1667 mhz', signed out on 6 November 2026, gives the band one meaning, the comet's OH line, dated and explained at its grain from seven cards headed by the ADS record of the detection; at this new address the registry records the authors as lost.", "claims": [ "F1", "CAP-1-01", "CAP-1-02", "CAP-1-06", "CAP-1-16", "CAP-1-15" ] }, { "n": 50, "para": 17, "text": "The Capture Registry reads the composition as making the natural line exclude what a natural line cannot exclude, a step the WIRED headline, 'Ends the Debate About Its Nature', carries, and as crediting Green Bank and the ATA, two technosignature searches, with confirming an OH line they did not report.", "claims": [ "F3", "CAP-1-03", "CAP-1-08", "CAP-1-09", "CAP-1-05" ] }, { "n": 51, "para": 17, "text": "It files every report at the band under the line, the forum thread's tracking with the comet's trajectory included, and a feature at the band that is not the comet's OH has no place in it.", "claims": [ "CAP-1-11", "CAP-1-12" ] }, { "n": 52, "para": 18, "text": "At '3i atlas hydroxyl', the control address, the same detection appears beside Swift's ultraviolet OH as chemistry, with its facilities and quantities and no verdict on the object's nature, and Loeb's essay on the radio detection heads the rail without entering the body.", "claims": [ "CAP-2-01", "CAP-2-02", "CAP-2-03", "CAP-2-04", "CAP-2-05", "CAP-2-06", "CAP-2-07" ] }, { "n": 53, "para": 18, "text": "The registry's smallest repair at the band keeps the detection and its meaning for the comet's activity and sets the technosignature searches apart as separate results with their own limits; its countertest reruns the address once the notebook is indexed.", "claims": [ "CAP-1-13", "CAP-1-14" ] } ], "claims": { "F10": { "kind": "field", "quote": "The hydroxyl radical (OH) can absorb or emit radiation at specific frequencies (such as the 1665 and 1667 MHz lines) due to transitions in its energy levels. These OH spectral lines have been detected in nebulae, comets, and star-forming regions.", "source": "B2", "source_label": "WIRED β€” The First Radio Signal From Comet 3I/Atlas Ends the Debate About Its Nature | WIRED", "locus": "ΒΆ4", "modality": "documented" }, "F38": { "kind": "field", "quote": "when water molecules (Hβ‚‚O) are expelled from a comet, they break down into hydrogen atoms (H) and hydroxyl radicals (OH) that remain in its coma. These hydroxyl radicals tend to absorb radio waves at two specific frequencies: 1665 and 1667 megahertz", "source": "B7", "source_label": "Futura, le mΓ©dia qui explore le monde β€” We Finally Know What the Interstellar Object Crossing the Solar System ...", "locus": "ΒΆ on the signal", "modality": "documented" }, "F36": { "kind": "field", "quote": "The 1.667 GHz frequency is a prominent spectral line associated with the hydroxyl (OH) radical, not neutral hydrogen (H I).", "source": "B6", "source_label": "www.antihackingonline.com β€” A signal of approximately 1.667 GHz from the interstellar object 3I/ATLAS was ...", "locus": "card snippet (unreachable)", "modality": "attributed" }, "F35": { "kind": "field", "quote": "A signal of approximately 1.667 GHz from the interstellar object 3I/ATLAS was", "source": "B6", "source_label": "www.antihackingonline.com β€” A signal of approximately 1.667 GHz from the interstellar object 3I/ATLAS was ...", "locus": "card title (unreachable)", "modality": "attributed" }, "F61": { "kind": "field", "quote": "The HO β€’ molecule has been observed in the interstellar medium since 1963 through its 18-cm transitions.", "source": "B10", "source_label": "Wikipedia β€” Hydroxyl radical", "locus": "Importance of interstellar HOβ€’ observations", "modality": "documented" }, "D1742-06": { "kind": "archive", "quote": "Natural line checked: cometary OH would fall within about Β±11 kHz of 1667.359 or 1665.402 MHz in the comet frame.", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§7.5 (line 387)", "modality": "documented", "date": "2026-11-06" }, "D1743-01": { "kind": "archive", "quote": "We took a narrow slice of that data, 2.93 MHz wide around 1667 MHz, near a frequency where comets naturally glow (the hydroxyl line).", "deposit": 1743, "source_label": "#1743 A Firm No: What the 3I/ATLAS Radio Searches Could See (EA-3I-ATLAS-PUBLIC-01 v1.1)", "record": "https://www.alexanarch.org/s/records/1743/", "locus": "Thirteen features under the floor ΒΆ3 (line 99)", "modality": "documented", "date": "2026-11-06" }, "F64": { "kind": "field", "quote": "also known as C/2025 N1 (ATLAS) … is an interstellar comet … discovered on 1 July 2025 by the Asteroid Terrestrial-impact Last Alert System (ATLAS) station.", "source": "B11", "source_label": "Wikipedia β€” 3I/ATLAS", "locus": "lead", "modality": "documented" }, "F65": { "kind": "field", "quote": "The prefix \"3I\" designates it as the third confirmed interstellar object passing through the Solar System", "source": "B11", "source_label": "Wikipedia β€” 3I/ATLAS", "locus": "lead", "modality": "documented" }, "F20": { "kind": "field", "quote": "The interstellar object 3I/ATLAS was discovered on July 1, 2025.", "source": "B4", "source_label": "SETI β€” Breakthrough Listen observations of interstellar object 3I/ATLAS", "locus": "ΒΆ1", "modality": "documented" }, "F44": { "kind": "field", "quote": "Then it reappeared after passing its closest point to our star, the perihelion, on October 29.", "source": "B7", "source_label": "Futura, le mΓ©dia qui explore le monde β€” We Finally Know What the Interstellar Object Crossing the Solar System ...", "locus": "ΒΆ on perihelion", "modality": "documented" }, "F59": { "kind": "field", "quote": "is the neutral form of the hydroxide ion", "source": "B10", "source_label": "Wikipedia β€” Hydroxyl radical", "locus": "lead (wikitext)", "modality": "documented" }, "F62": { "kind": "field", "quote": "is split by lambda doubling interaction … Hyperfine interaction with the unpaired spin of the proton further splits the levels.", "source": "B10", "source_label": "Wikipedia β€” Hydroxyl radical", "locus": "Interstellar formation and destruction", "modality": "documented" }, "F60": { "kind": "field", "quote": "The first experimental evidence for the presence of 18 cm absorption lines of the hydroxyl (HO β€’ ) radical in the radio absorption spectrum of Cassiopeia A was obtained by Weinreb et al.", "source": "B10", "source_label": "Wikipedia β€” Hydroxyl radical", "locus": "First detection of interstellar HOβ€’", "modality": "documented" }, "F63": { "kind": "field", "quote": "were the first masers to be discovered in space and have been observed in more environments than any other type of maser.", "source": "B10", "source_label": "Wikipedia β€” Hydroxyl radical", "locus": "HOβ€’ masers", "modality": "documented" }, "F25": { "kind": "field", "quote": "3I/ATLAS was also observed by the MeerKAT telescope, which detected signatures of hydroxyl, which is expected as sunlight breaks down water ice in the comet into its chemical constituents.", "source": "B4", "source_label": "SETI β€” Breakthrough Listen observations of interstellar object 3I/ATLAS", "locus": "MeerKAT", "modality": "documented" }, "CAP-1-06": { "kind": "archive", "quote": "WHAT IS ACCURATE. The detection: MeerKAT, 24 October 2025 (the ADS card: 'We observed 3I/ATLAS with MeerKAT on 24 October 2025 from UTC 05:17:16-08:29:37'), OH absorption at the 1665 and 1667 MHz main lines, from water outgassed by the comet and broken up by sunlight.", "deposit": null, "source_label": "Capture Registry (EA-WG-CAPTURES-01), entry 3i-atlas-1667-mhz-aio-20261106 (OBS-822a5cb98c2f, AXN:0C18.CAPTURE.πŸ”ΌπŸŒ‹πŸŸ’πŸŒˆπŸ“œπŸŽ―)", "record": "https://www.alexanarch.org/captures/3i-atlas-1667-mhz-aio-20261106/", "locus": "3i-atlas-1667-mhz-aio-20261106, findings[0]", "modality": "documented", "date": "2026-11-06" }, "F2": { "kind": "field", "quote": "We observed 3I/ATLAS with MeerKAT on 24 October 2025 from UTC 05:17:16-08:29:37, using the L-band receivers and the NE54M (1.633 kHz channel width)", "source": "B1", "source_label": "Harvard University β€” Detection of 1665/1667 MHz OH absorption in 3I/ATLAS - ADS", "locus": "card snippet (unreachable)", "modality": "documented" }, "F46": { "kind": "field", "quote": "We observed 3I/ATLAS with MeerKAT on 24 October 2025 from UTC 05:17:16-08:29:37, using the L-band receivers and the NE54M (1.633 kHz channel width) correlator mode, reaching an rms sensitivity of 1.5 mJy/beam in a 0.3 km/s channel", "source": "B8", "source_label": "The Astronomer's Telegram β€” ATel #17473: Detection of 1665/1667 MHz OH absorption in 3I/ATLAS (the detection's own text)", "locus": "ΒΆ1", "modality": "documented" }, "F47": { "kind": "field", "quote": "Angular separation from the Sun at time of observation was 3.76 degrees.", "source": "B8", "source_label": "The Astronomer's Telegram β€” ATel #17473: Detection of 1665/1667 MHz OH absorption in 3I/ATLAS (the detection's own text)", "locus": "ΒΆ1", "modality": "documented" }, "F11": { "kind": "field", "quote": "The detection was possible on October 24, five days before 3I/Atlas reached its closest point to the sun. MeerKAT attempted to detect radio signals earlier, on September 20 and 28, although it was unsuccessful.", "source": "B2", "source_label": "WIRED β€” The First Radio Signal From Comet 3I/Atlas Ends the Debate About Its Nature | WIRED", "locus": "ΒΆ5", "modality": "documented" }, "F39": { "kind": "field", "quote": "astronomers report that they detected a signal from 3I/Atlas precisely at those frequencies β€” just five days before its perihelion passage.", "source": "B7", "source_label": "Futura, le mΓ©dia qui explore le monde β€” We Finally Know What the Interstellar Object Crossing the Solar System ...", "locus": "ΒΆ on the signal", "modality": "attributed" }, "F4": { "kind": "field", "quote": "Detection: South Africa's MeerKAT radio telescope detected the first radio signal from interstellar object 3I/Atlas on October 24, 2025.", "source": "B2", "source_label": "WIRED β€” The First Radio Signal From Comet 3I/Atlas Ends the Debate About Its Nature | WIRED", "locus": "card snippet", "modality": "documented" }, "F48": { "kind": "field", "quote": "OH absorption was detected in both the 1665 MHz and 1667 MHz lines.", "source": "B8", "source_label": "The Astronomer's Telegram β€” ATel #17473: Detection of 1665/1667 MHz OH absorption in 3I/ATLAS (the detection's own text)", "locus": "ΒΆ1", "modality": "documented" }, "F7": { "kind": "field", "quote": "\"OH absorption was detected on the 1665 MHz and 1667 MHz lines,\" according to the researchers", "source": "B2", "source_label": "WIRED β€” The First Radio Signal From Comet 3I/Atlas Ends the Debate About Its Nature | WIRED", "locus": "ΒΆ2", "modality": "attributed" }, "F49": { "kind": "field", "quote": "Gaussian fits to the two lines yielded peak fluxes of -8.4+/-3.1 mJy and -14.2+/-3.4 mJy at -15.59+/-0.16 km/s and -15.65+/-0.17 km/s for the two lines, respectively.", "source": "B8", "source_label": "The Astronomer's Telegram β€” ATel #17473: Detection of 1665/1667 MHz OH absorption in 3I/ATLAS (the detection's own text)", "locus": "ΒΆ1", "modality": "documented" }, "F51": { "kind": "field", "quote": "The detection of OH on 24 October 2025 contrasts with the MeerKAT non-detection of these lines on 20 September 2025 from 14:36:54-15:39:25 UTC (rms noise of 3 mJy/beam) and 28 September 2025 from 10:00:26-16:55:53 UTC (rms noise of 1 mJy/beam).", "source": "B8", "source_label": "The Astronomer's Telegram β€” ATel #17473: Detection of 1665/1667 MHz OH absorption in 3I/ATLAS (the detection's own text)", "locus": "ΒΆ1", "modality": "documented" }, "F1": { "kind": "field", "quote": "Detection of 1665/1667 MHz OH absorption in 3I/ATLAS - ADS", "source": "B1", "source_label": "Harvard University β€” Detection of 1665/1667 MHz OH absorption in 3I/ATLAS - ADS", "locus": "card title", "modality": "documented" }, "F45": { "kind": "field", "quote": "Detection of 1665/1667 MHz OH absorption in 3I/ATLAS ATel #17473; D. J. Pisano (University of Cape Town), Oleg M. Smirnov (Rhodes University & SARAO), Mykola Ivchenko (KTH), Lorenz Roth (KTH), Sarah Buchner (SARAO) on 4 Nov 2025; 10:28 UT", "source": "B8", "source_label": "The Astronomer's Telegram β€” ATel #17473: Detection of 1665/1667 MHz OH absorption in 3I/ATLAS (the detection's own text)", "locus": "header", "modality": "documented" }, "F50": { "kind": "field", "quote": "The absorption features are consistent with the expected OH level population due to the heliocentric velocity of the comet.", "source": "B8", "source_label": "The Astronomer's Telegram β€” ATel #17473: Detection of 1665/1667 MHz OH absorption in 3I/ATLAS (the detection's own text)", "locus": "ΒΆ1", "modality": "interpretation" }, "F9": { "kind": "field", "quote": "The lines appear as absorption because 3I/Atlas was very close to the sun and the observing geometry favors absorption over emission.", "source": "B2", "source_label": "WIRED β€” The First Radio Signal From Comet 3I/Atlas Ends the Debate About Its Nature | WIRED", "locus": "ΒΆ3", "modality": "interpretation" }, "F52": { "kind": "field", "quote": "Further MeerKAT observations of 1665/1667 MHz OH in absorption and emission, and a technosignature search in 3I/ATLAS", "source": "B9", "source_label": "The Astronomer's Telegram β€” ATel #17499: Further MeerKAT observations of 1665/1667 MHz OH in absorption and emission, and a technosignature search in 3I/ATLAS", "locus": "title", "modality": "documented" }, "F53": { "kind": "field", "quote": "We detected both the 1665 MHz and 1667 MHz OH lines in absorption on 5 November from UTC 03:54:29-05:48:05 and again on 6 November from UTC 03:50:22-11:23:46.", "source": "B9", "source_label": "The Astronomer's Telegram β€” ATel #17499: Further MeerKAT observations of 1665/1667 MHz OH in absorption and emission, and a technosignature search in 3I/ATLAS", "locus": "ΒΆ1", "modality": "documented" }, "F56": { "kind": "field", "quote": "These detections contrast to the non-detection by MeerKAT of either OH line on 4 November from UTC 04:12:55-11:45:12 with an rms noise of 1.1 mJy/beam.", "source": "B9", "source_label": "The Astronomer's Telegram β€” ATel #17499: Further MeerKAT observations of 1665/1667 MHz OH in absorption and emission, and a technosignature search in 3I/ATLAS", "locus": "ΒΆ2", "modality": "documented" }, "F54": { "kind": "field", "quote": "Consistent with the expected OH level population due to the heliocentric velocity of the comet, we then detected the OH lines in emission on 11 November from UTC 04:11:20-07:31:01 and 12 November from UTC 03:06:42-05:42:55.", "source": "B9", "source_label": "The Astronomer's Telegram β€” ATel #17499: Further MeerKAT observations of 1665/1667 MHz OH in absorption and emission, and a technosignature search in 3I/ATLAS", "locus": "ΒΆ1", "modality": "documented" }, "F55": { "kind": "field", "quote": "These velocities are consistent with the expected velocity of the comet.", "source": "B9", "source_label": "The Astronomer's Telegram β€” ATel #17499: Further MeerKAT observations of 1665/1667 MHz OH in absorption and emission, and a technosignature search in 3I/ATLAS", "locus": "ΒΆ2", "modality": "documented" }, "F66": { "kind": "field", "quote": "A tentative detection of water vapor and hydroxyl radicals (OH) by the Swift Observatory on 31 July and 1 August 2025 suggested that the water ice grains in 3I/ATLAS's coma are sublimating beyond the nucleus", "source": "B11", "source_label": "Wikipedia β€” 3I/ATLAS", "locus": "Composition and gas emissions", "modality": "documented" }, "F67": { "kind": "field", "quote": "On 31 July to 1 August, the Swift Observatory found tentative evidence for water vapor and OH.", "source": "B11", "source_label": "Wikipedia β€” 3I/ATLAS", "locus": "Alien spacecraft speculation", "modality": "documented" }, "F21": { "kind": "field", "quote": "There is currently no evidence to suggest that it is anything other than a natural astrophysical object.", "source": "B4", "source_label": "SETI β€” Breakthrough Listen observations of interstellar object 3I/ATLAS", "locus": "ΒΆ1", "modality": "interpretation" }, "F22": { "kind": "field", "quote": "However, given the small number of such objects known (only three to date), and the plausibility of interstellar probes as a technosignature (a sign of extraterrestrial intelligence) … thorough study is warrant", "source": "B4", "source_label": "SETI β€” Breakthrough Listen observations of interstellar object 3I/ATLAS", "locus": "ΒΆ1", "modality": "interpretation" }, "F30": { "kind": "field", "quote": "In summary, 3I/ATLAS continues to behave as expected from natural astrophysical processes. That said, it remains an extremely interesting target for observation given the overall rarity of interstellar objects.", "source": "B4", "source_label": "SETI β€” Breakthrough Listen observations of interstellar object 3I/ATLAS", "locus": "summary", "modality": "interpretation" }, "F33": { "kind": "field", "quote": "Interstellar object 3I/ATLAS, discovered July 1, 2025, exhibits natural astrophysical behavior with no detected technosignatures.", "source": "B4", "source_label": "SETI β€” Breakthrough Listen observations of interstellar object 3I/ATLAS", "locus": "card snippet", "modality": "attributed" }, "SOPH-01": { "kind": "archive", "quote": "the comet's natural activity is established by its spectroscopy and its OH lines.", "deposit": null, "source_label": "The sophistry measure on the 3I/ATLAS record: first run, 2026-11-06 (EA-SOPHISTRY-01, #1727)", "record": "https://www.alexanarch.org/rebuild/3i-atlas-signal-search/claude/run-2026-11-03/sophistry/FINDINGS-sophistry.md", "locus": "rebuild/3i-atlas-signal-search/claude/run-2026-11-03/sophistry/FINDINGS-sophistry.md, S3, smallest repair", "modality": "interpretation", "date": "2026-11-06" }, "CAP-1-07": { "kind": "archive", "quote": "An absorption line shows the comet's gas; it bears on the comet's activity and on nothing a transmitter would or would not do.", "deposit": null, "source_label": "Capture Registry (EA-WG-CAPTURES-01), entry 3i-atlas-1667-mhz-aio-20261106 (OBS-822a5cb98c2f, AXN:0C18.CAPTURE.πŸ”ΌπŸŒ‹πŸŸ’πŸŒˆπŸ“œπŸŽ―)", "record": "https://www.alexanarch.org/captures/3i-atlas-1667-mhz-aio-20261106/", "locus": "3i-atlas-1667-mhz-aio-20261106, findings[1]", "modality": "interpretation", "date": "2026-11-06" }, "F3": { "kind": "field", "quote": "The First Radio Signal From Comet 3I/Atlas Ends the Debate About Its Nature", "source": "B2", "source_label": "WIRED β€” The First Radio Signal From Comet 3I/Atlas Ends the Debate About Its Nature | WIRED", "locus": "title", "modality": "interpretation" }, "F5": { "kind": "field", "quote": "More evidence has emerged to support the natural origin of comet 3I/Atlas", "source": "B2", "source_label": "WIRED β€” The First Radio Signal From Comet 3I/Atlas Ends the Debate About Its Nature | WIRED", "locus": "ΒΆ1", "modality": "interpretation" }, "F6": { "kind": "field", "quote": "this isn't a radio signal like a transmission emitted by a spacecraft. It's instead a radio frequency pattern detected by MeerKAT", "source": "B2", "source_label": "WIRED β€” The First Radio Signal From Comet 3I/Atlas Ends the Debate About Its Nature | WIRED", "locus": "ΒΆ2", "modality": "interpretation" }, "F8": { "kind": "field", "quote": "What MeerKAT specifically detected were lines of radio absorption by hydroxyl radicals, that is, OH molecules, a pattern that would be consistent with typical comet activity.", "source": "B2", "source_label": "WIRED β€” The First Radio Signal From Comet 3I/Atlas Ends the Debate About Its Nature | WIRED", "locus": "ΒΆ3", "modality": "interpretation" }, "F17": { "kind": "field", "quote": "This story first appeared on WIRED en EspaΓ±ol and has been translated from Spanish.", "source": "B2", "source_label": "WIRED β€” The First Radio Signal From Comet 3I/Atlas Ends the Debate About Its Nature | WIRED", "locus": "footer", "modality": "documented" }, "F16": { "kind": "field", "quote": "Will the MeerKAT detection be enough to put an end to conspiracy theories about 3I/Atlas? Likely not", "source": "B2", "source_label": "WIRED β€” The First Radio Signal From Comet 3I/Atlas Ends the Debate About Its Nature | WIRED", "locus": "ΒΆ8", "modality": "interpretation" }, "F14": { "kind": "field", "quote": "continued monitoring of the object would need to be conducted to determine whether the OH production is constant or intermittent", "source": "B2", "source_label": "WIRED β€” The First Radio Signal From Comet 3I/Atlas Ends the Debate About Its Nature | WIRED", "locus": "ΒΆ6", "modality": "interpretation" }, "F12": { "kind": "field", "quote": "I encouraged radio observatories like MeerKAT to search for radio emission from 3I/ATLAS given that the arrival direction of 3I/ATLAS coincided to within 9 degrees with the arrival direction of the Wow! Signal detected in 1977 at a frequency of 1.4204556 gigahertz", "source": "B2", "source_label": "WIRED β€” The First Radio Signal From Comet 3I/Atlas Ends the Debate About Its Nature | WIRED", "locus": "ΒΆ5 (Loeb, quoted)", "modality": "attributed" }, "F13": { "kind": "field", "quote": "no radio detection of 3I/ATLAS has been reported so far, other than the OH absorption signal.", "source": "B2", "source_label": "WIRED β€” The First Radio Signal From Comet 3I/Atlas Ends the Debate About Its Nature | WIRED", "locus": "ΒΆ6 (Loeb, quoted)", "modality": "attributed" }, "F15": { "kind": "field", "quote": "Loeb has been has been among the most vocal advocates of the hypothesis that 3I/Atlas has a technological origin.", "source": "B2", "source_label": "WIRED β€” The First Radio Signal From Comet 3I/Atlas Ends the Debate About Its Nature | WIRED", "locus": "ΒΆ7", "modality": "interpretation" }, "F41": { "kind": "field", "quote": "This radio signal is therefore not surprising for a comet approaching the Sun β€” especially one that previous studies have shown to be losing large quantities of water.", "source": "B7", "source_label": "Futura, le mΓ©dia qui explore le monde β€” We Finally Know What the Interstellar Object Crossing the Solar System ...", "locus": "ΒΆ on the signal", "modality": "interpretation" }, "F40": { "kind": "field", "quote": "A radio signal that Avi Loeb and his followers might be tempted to interpret as one emitted by a huge craft from beyond our Solar System.", "source": "B7", "source_label": "Futura, le mΓ©dia qui explore le monde β€” We Finally Know What the Interstellar Object Crossing the Solar System ...", "locus": "ΒΆ on the signal", "modality": "interpretation" }, "F42": { "kind": "field", "quote": "So even if Avi Loeb still refuses to accept it, everything points to 3I/Atlas being of natural origin.", "source": "B7", "source_label": "Futura, le mΓ©dia qui explore le monde β€” We Finally Know What the Interstellar Object Crossing the Solar System ...", "locus": "closing ΒΆ", "modality": "interpretation" }, "F37": { "kind": "field", "quote": "We Finally Know What the Interstellar Object Crossing the Solar System Really Is β€” and It’s Unique", "source": "B7", "source_label": "Futura, le mΓ©dia qui explore le monde β€” We Finally Know What the Interstellar Object Crossing the Solar System ...", "locus": "title", "modality": "interpretation" }, "F43": { "kind": "field", "quote": "At 04:10 UT, Oct 24 2025, South Africa’s MeerKAT Radio Telescope detected the first-ever radio absorption lines from the interstellar object 3I/ATLAS", "source": "B7", "source_label": "Futura, le mΓ©dia qui explore le monde β€” We Finally Know What the Interstellar Object Crossing the Solar System ...", "locus": "embedded post (Ezee, 2025-11-10)", "modality": "attributed" }, "F34": { "kind": "field", "quote": "frequencies around 1665 and 1667 MHz. This detection confirms ongoing cometary activity such as sublimation and outgassing", "source": "B5", "source_label": "FacebookΒ·The Lighter Side of Science β€” What is the meaning of the first radio detection from interstellar object 3I ...", "locus": "card snippet (unreachable)", "modality": "attributed" }, "F18": { "kind": "field", "quote": "Unexplained Radio Signals and more from 3I/Atlas : r/amateurradio - Reddit", "source": "B3", "source_label": "RedditΒ·r/amateurradio β€” Unexplained Radio Signals and more from 3I/Atlas : r/amateurradio - Reddit", "locus": "card title", "modality": "attributed" }, "F19": { "kind": "field", "quote": "December 15, 2025 β€” 3I/ATLAS Radio Signal: While a radio signal was detected from 3I/ATLAS, some sources indicate it is not a transmission from a spacecraft but a radio frequency p", "source": "B3", "source_label": "RedditΒ·r/amateurradio β€” Unexplained Radio Signals and more from 3I/Atlas : r/amateurradio - Reddit", "locus": "card snippet (unreachable)", "modality": "attributed" }, "F26": { "kind": "field", "quote": "In parallel with these observations, the BLUSE (Breakthrough Listen User Supplied Equipment) computer at MeerKAT searched the data for technosignatures.", "source": "B4", "source_label": "SETI β€” Breakthrough Listen observations of interstellar object 3I/ATLAS", "locus": "MeerKAT", "modality": "documented" }, "F57": { "kind": "field", "quote": "A total of 23,689 signals were detected; however, all were determined to not be spatially consistent with the position of 3I/ATLAS and thus were likely caused by anthropogenic radio frequency interference (RFI).", "source": "B9", "source_label": "The Astronomer's Telegram β€” ATel #17499: Further MeerKAT observations of 1665/1667 MHz OH in absorption and emission, and a technosignature search in 3I/ATLAS", "locus": "ΒΆ3", "modality": "documented" }, "F58": { "kind": "field", "quote": "we established a detection limit of 0.17 W over the 900-1670 MHz range, approximately equivalent to the power output of a mobile phone handset at the distance to 3I/ATLAS, which was 334 million kilometres at the time.", "source": "B9", "source_label": "The Astronomer's Telegram β€” ATel #17499: Further MeerKAT observations of 1665/1667 MHz OH in absorption and emission, and a technosignature search in 3I/ATLAS", "locus": "ΒΆ3", "modality": "documented" }, "F27": { "kind": "field", "quote": "No artificial radio emission was detected at a limit of 0.17 W over the 900 - 1670 MHz range, approximately equivalent to the power output of a mobile phone handset at the distance to 3I/ATLAS.", "source": "B4", "source_label": "SETI β€” Breakthrough Listen observations of interstellar object 3I/ATLAS", "locus": "MeerKAT", "modality": "documented" }, "F24": { "kind": "field", "quote": "Data were acquired across frequencies of 1 - 9 GHz, reaching sensitivities between 10 - 110 W equivalent isotropic radiated power (EIRP).", "source": "B4", "source_label": "SETI β€” Breakthrough Listen observations of interstellar object 3I/ATLAS", "locus": "Allen Telescope Array", "modality": "documented" }, "F28": { "kind": "field", "quote": "Data were recorded on July 31, 2025, September 12, 2025, and October 5, 2025. Of our three Murriyang sessions 3I/ATLAS was closest to Earth on October 5, 2025, with our observations having an expected sensitivity to transmitters with an EIRP of around 5 W. Results of the narrowband search will be posted once this has been completed.", "source": "B4", "source_label": "SETI β€” Breakthrough Listen observations of interstellar object 3I/ATLAS", "locus": "Parkes", "modality": "documented" }, "F29": { "kind": "field", "quote": "We used four receivers (L, S, C, and X) spanning frequencies of 1 - 12 GHz. At closest approach, the GBT is sensitive to transmitters with an EIRP of approximately 0.1 W, more sensitive than all previous observations. No artificial radio emission localized to 3I/ATLAS was detected.", "source": "B4", "source_label": "SETI β€” Breakthrough Listen observations of interstellar object 3I/ATLAS", "locus": "Green Bank", "modality": "documented" }, "F23": { "kind": "field", "quote": "No technosignatures have been detected in any of these searches.", "source": "B4", "source_label": "SETI β€” Breakthrough Listen observations of interstellar object 3I/ATLAS", "locus": "ΒΆ2", "modality": "documented" }, "F31": { "kind": "field", "quote": "One six-scan cadence (5 minutes per pointing) is available at each of L (scans numbered 0013 - 0018)", "source": "B4", "source_label": "SETI β€” Breakthrough Listen observations of interstellar object 3I/ATLAS", "locus": "Public data", "modality": "documented" }, "D1742-23": { "kind": "archive", "quote": "| MeerKAT | Β±5 kHz of 1612, 1665, 1667 MHz in the comet frame; H, H/√2, H/Ο† | Claude | zero hits in any beam |", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§6 (table) (line 333)", "modality": "documented", "date": "2026-11-06" }, "D1742-22": { "kind": "archive", "quote": "The MeerKAT hit lists (6.0 million hits, S/N β‰₯ 6, 64 beams, six days from 2025-11-06 to 2025-12-19) hold no hit between 1663 and 1667 MHz in any beam", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§7.11 (line 399)", "modality": "documented", "date": "2026-11-06" }, "D1742-26": { "kind": "archive", "quote": "| ATA, July 3, 1665.75–1667.25 MHz | full-band comet frame | ChatGPT | 4 vs 4.475 Β± 3.07; all four fail held-out continuation |", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§6 (table) (line 343)", "modality": "documented", "date": "2026-11-06" }, "D1742-27": { "kind": "archive", "quote": "| ATA, July 3, 1666.75–1667.75 MHz | numerical anchors: OH 1667.35903 rest; 1667.000 at emitter; 1667.000 at receiver; bursts and three-tone combs | ChatGPT | no discovery flag; no continuation flag |", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§6 (table) (line 344)", "modality": "documented", "date": "2026-11-06" }, "D1742-28": { "kind": "archive", "quote": "Claude tested this class on the GBT OH channel with the beam swap as control: 3 on-source clusters against 7 with the beams swapped. Nothing is there (Β§6).", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§5.3 (line 321)", "modality": "documented", "date": "2026-11-06" }, "D1742-25": { "kind": "archive", "quote": "| GBT, 1665 MHz channel | same rule | Claude | 5 vs 5.7 Β± 2.2 |", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§6 (table) (line 339)", "modality": "documented", "date": "2026-11-06" }, "D1742-24": { "kind": "archive", "quote": "| GBT 2025-12-18, 1612, 1665, 1667 MHz | calibration: the comet's own OH absorption (MeerKAT, October), frozen | Claude | not recovered; three-sigma floor about 1 Γ— 10⁻³ of system power (about 11–12 mJy), near the October strength of the deeper line |", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§6 (table) (line 360)", "modality": "documented", "date": "2026-11-06" }, "CAP-1-10": { "kind": "archive", "quote": "in the public Green Bank data of 2025-12-18 the notebook's frozen attempt to recover the comet's OH failed", "deposit": null, "source_label": "Capture Registry (EA-WG-CAPTURES-01), entry 3i-atlas-1667-mhz-aio-20261106 (OBS-822a5cb98c2f, AXN:0C18.CAPTURE.πŸ”ΌπŸŒ‹πŸŸ’πŸŒˆπŸ“œπŸŽ―)", "record": "https://www.alexanarch.org/captures/3i-atlas-1667-mhz-aio-20261106/", "locus": "3i-atlas-1667-mhz-aio-20261106, findings[2]", "modality": "documented", "date": "2026-11-06" }, "O1450-01": { "kind": "archive", "quote": "A null result constrains only those hypotheses for which the end-to-end acceptance of the acquisition and analysis chain is sufficiently characterized.", "deposit": 1450, "source_label": "#1450 The Iceberg Document: Instrument-Conditioned Nullity, Correlated Blind Spots, and the Conditions for Continued Surprise (EA-SEI-ICEBERG-01 v1.0)", "record": "https://www.alexanarch.org/s/records/1450/", "locus": "Β§3.2 Instrument-conditioned nullity, rigorous form (line 158)", "modality": "stipulation", "date": "2026-08-11" }, "D1742-36": { "kind": "archive", "quote": "Breakthrough Listen classifies after preservation: the hit lists sit beside spectral products that keep the powers below threshold (Β§4.2). That choice is why every test in Β§6 and Β§7 could be run", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§9.5 (line 455)", "modality": "interpretation", "date": "2026-11-06" }, "D1742-01": { "kind": "archive", "quote": "in the Green Bank L-band cadence of 2025-12-18, a comet-frame coincidence count at 1665.53–1668.46 MHz gives 13 clusters against 3.75 Β± 2.05 (maximum 8) for 40 false-acceleration frames.", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§0.2 (line 188)", "modality": "documented", "date": "2026-11-06" }, "D1742-03": { "kind": "archive", "quote": "GBT blc23 coarse channel 7, scans 0013–0018 (ON 0013, 0015, 0017). … rows summed along the path a tone fixed on 3I/ATLAS takes (Horizons range-rate at the GBT site); robust z per scan; scans aligned in the comet rest frame. Kept: z β‰₯ 2.5 in all three ON scans and < 2.0 in all three OFF scans, Β±1 channel; merged at 10 Hz. Null: the whole procedure under 40 false range-accelerations (0.03–1 Hz/s at 1.42 GHz, seed 11).", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§7.1 (line 369)", "modality": "stipulation", "date": "2026-11-06" }, "D1743-02": { "kind": "archive", "quote": "The wrong drifts gave an average of 3.75 such clusters, never more than 8. The object's true drift gave 13.", "deposit": 1743, "source_label": "#1743 A Firm No: What the 3I/ATLAS Radio Searches Could See (EA-3I-ATLAS-PUBLIC-01 v1.1)", "record": "https://www.alexanarch.org/s/records/1743/", "locus": "Thirteen features under the floor ΒΆ4 (line 101)", "modality": "documented", "date": "2026-11-06" }, "CAP-1-04": { "kind": "archive", "quote": "The address is where the notebook's thirteen sit", "deposit": null, "source_label": "Capture Registry (EA-WG-CAPTURES-01), entry 3i-atlas-1667-mhz-aio-20261106 (OBS-822a5cb98c2f, AXN:0C18.CAPTURE.πŸ”ΌπŸŒ‹πŸŸ’πŸŒˆπŸ“œπŸŽ―)", "record": "https://www.alexanarch.org/captures/3i-atlas-1667-mhz-aio-20261106/", "locus": "3i-atlas-1667-mhz-aio-20261106, reading", "modality": "documented", "date": "2026-11-06" }, "D1742-02": { "kind": "archive", "quote": "It reproduces exactly under an independent implementation, depends on the real assignment of the ON scans, and is sensitive to normalization and threshold (Β§7).", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§0.2 (line 265)", "modality": "documented", "date": "2026-11-06" }, "D1742-05": { "kind": "archive", "quote": "The excess depends on the real ON assignment: no false frame reaches it, no false frame gives an ON-minus-swap difference above 6, and the actual ON triple gives 13 where the other nineteen role assignments give 0–6. It weakens under a frequency-baseline normalization (6, with 7 of 40 controls reaching it) and vanishes at the neighbouring thresholds.", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§7.4 (line 385)", "modality": "documented", "date": "2026-11-06" }, "D1742-04": { "kind": "archive", "quote": "A plus-one rank of 1/41 is the descriptive figure; it carries none of the trial history and is no global p-value.", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§7.2 (line 371)", "modality": "self-description", "date": "2026-11-06" }, "D1742-15": { "kind": "archive", "quote": "The excess occupies one slice of the score just above the gate, with no tail below it", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§7.17 (line 411)", "modality": "documented", "date": "2026-11-06" }, "D1742-07": { "kind": "archive", "quote": "The nearest of the thirteen, C08 at 1667.412866 MHz, is 54 kHz away. The thirteen do not trace the comet's OH.", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§7.5 (line 387)", "modality": "documented", "date": "2026-11-06" }, "D1743-03": { "kind": "archive", "quote": "The comet's own hydroxyl emission would sit within about 11 kHz of known frequencies; the nearest of the thirteen is 54 kHz away.", "deposit": 1743, "source_label": "#1743 A Firm No: What the 3I/ATLAS Radio Searches Could See (EA-3I-ATLAS-PUBLIC-01 v1.1)", "record": "https://www.alexanarch.org/s/records/1743/", "locus": "Thirteen features under the floor, list (line 107)", "modality": "documented", "date": "2026-11-06" }, "D1742-08": { "kind": "archive", "quote": "C02 crosses a stationary line complex near 1665.61512 MHz present in all six scans, ON and OFF … contamination.", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§7.6 (line 389)", "modality": "documented", "date": "2026-11-06" }, "D1742-14": { "kind": "archive", "quote": "Masked, the comet frame keeps 12 clusters against 3.78 Β± 2.09 (maximum 9) in forty masked false frames: the structure does not explain the excess.", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§7.16 (line 409)", "modality": "documented", "date": "2026-11-06" }, "D1742-09": { "kind": "archive", "quote": "C03–C13 are unresolved; for each, the largest single sample carries at most 9–14% of the positive contribution in any ON scan, so they are no single-spike artefacts.", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§7.6 (line 389)", "modality": "documented", "date": "2026-11-06" }, "D1742-10": { "kind": "archive", "quote": "Per step the candidates average about 0.35Οƒ; their rest frequencies show no spacing, mirror or whole-kHz structure beyond random sets.", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§7.7 (line 391)", "modality": "documented", "date": "2026-11-06" }, "D1743-11": { "kind": "archive", "quote": "In any single look each cluster stands only 2.5 to 3.3 standard deviations above the noise. They appear only when three looks are added together along the object's drift, which none of the published searches did.", "deposit": 1743, "source_label": "#1743 A Firm No: What the 3I/ATLAS Radio Searches Could See (EA-3I-ATLAS-PUBLIC-01 v1.1)", "record": "https://www.alexanarch.org/s/records/1743/", "locus": "Thirteen features under the floor, Faint (line 115)", "modality": "documented", "date": "2026-11-06" }, "D1742-17": { "kind": "archive", "quote": "Coarse channel 7 has E 4.52; the other 63 have 0.22 Β± 1.18, the largest 2.36 … that probability is unestablished.", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§7.19 (line 415)", "modality": "documented", "date": "2026-11-06" }, "D1742-12": { "kind": "archive", "quote": "it does not recur in fifteen L-band channels of the same scans, in the S-band channel (Β§7.8), or at Parkes (Β§7.13). Its status: a reproducible, beam-sided excess in one 2.93 MHz channel, sensitive to normalization and threshold, unreplicated.", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§7.15 (line 407)", "modality": "documented", "date": "2026-11-06" }, "D1742-19": { "kind": "archive", "quote": "No target flags under either window. … so the null bounds a source only at Parkes's sensitivity and on that date.", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§7.13 (line 403)", "modality": "documented", "date": "2026-11-06" }, "D1742-18": { "kind": "archive", "quote": "The thirteen: 0 within 10 Hz and 0 within 50 Hz.", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§7.20 (line 417)", "modality": "documented", "date": "2026-11-06" }, "D1742-13": { "kind": "archive", "quote": "The cadence therefore holds thirteen candidate features and one population-level anomaly, and the two need separate tests.", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§7.15 (line 407)", "modality": "interpretation", "date": "2026-11-06" }, "D1742-16": { "kind": "archive", "quote": "The nulls therefore show that the excess is unlike what each one generates; they do not establish that a fluctuation at the 2.5 cut is excluded, since that would need a background shown exchangeable for this fluctuation.", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§7.18 (line 413)", "modality": "self-description", "date": "2026-11-06" }, "D1742-35": { "kind": "archive", "quote": "If the telescope sat where the header says, comet-locked power reached 0017 only through the beam's far response, and the thirteen are very unlikely to be emission from the object; if the header is a slew snapshot, the question stays open.", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§7.10 (line 397)", "modality": "interpretation", "date": "2026-11-06" }, "D1742-20": { "kind": "archive", "quote": "The public data argue that 0017 observed the comet; the antenna record for 05:08:17–05:13:15 UTC would settle it directly and is not public.", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§7.14 (line 405)", "modality": "interpretation", "date": "2026-11-06" }, "D1742-21": { "kind": "archive", "quote": "a source on axis at the comet's distance radiates about 26 mW (21–32 mW across the GBT calibration range), a descriptive and selection-biased figure. … a source of C03's strength would be invisible to them.", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§7.9 (line 395)", "modality": "documented", "date": "2026-11-06" }, "D1743-07": { "kind": "archive", "quote": "So correcting the ATA's sign would not have made these features visible to the ATA. The ATA's absence at their frequencies says nothing about them, one way or the other. What the sign error removed is a class; what the thirteen are is a separate question.", "deposit": 1743, "source_label": "#1743 A Firm No: What the 3I/ATLAS Radio Searches Could See (EA-3I-ATLAS-PUBLIC-01 v1.1)", "record": "https://www.alexanarch.org/s/records/1743/", "locus": "Thirteen features under the floor ΒΆ proportion (line 126)", "modality": "interpretation", "date": "2026-11-06" }, "D1743-05": { "kind": "archive", "quote": "First, they sit in the drift class the ATA filter removed. On the night of the Green Bank observation, the object's range-rate was rising (from βˆ’1.917 to βˆ’1.827 km/s between 04:30 and 05:40 UTC), so a tone on it would drift negative, about βˆ’0.12 Hz/s at 1667 MHz. The Green Bank search itself didn't cut by sign.", "deposit": 1743, "source_label": "#1743 A Firm No: What the 3I/ATLAS Radio Searches Could See (EA-3I-ATLAS-PUBLIC-01 v1.1)", "record": "https://www.alexanarch.org/s/records/1743/", "locus": "Thirteen features under the floor ΒΆ First (line 122)", "modality": "documented", "date": "2026-11-06" }, "D1743-06": { "kind": "archive", "quote": "Second, they sit below the floor of every published search. None of those searches reported a firm no about features like these; their pipelines weren't built to see them.", "deposit": 1743, "source_label": "#1743 A Firm No: What the 3I/ATLAS Radio Searches Could See (EA-3I-ATLAS-PUBLIC-01 v1.1)", "record": "https://www.alexanarch.org/s/records/1743/", "locus": "Thirteen features under the floor ΒΆ Second (line 124)", "modality": "interpretation", "date": "2026-11-06" }, "D1742-30": { "kind": "archive", "quote": "the thirteen (Β§7) sit in the uncharacterized region on both counts: below every published floor, and in the negative-drift class.", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§9.3 (line 451)", "modality": "interpretation", "date": "2026-11-06" }, "D1742-31": { "kind": "archive", "quote": "The thirteen are what a complementary instrument returns from the shared miss region; whether they are anything is the open question of Β§7.", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§9.6 (line 457)", "modality": "interpretation", "date": "2026-11-06" }, "D1742-37": { "kind": "archive", "quote": "and why the thirteen could be found at all.", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§9.5 (line 455)", "modality": "interpretation", "date": "2026-11-06" }, "D1742-32": { "kind": "archive", "quote": "None of them says the thirteen are a transmission or that the searches missed one", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§9.12 (line 469)", "modality": "self-description", "date": "2026-11-06" }, "D1743-04": { "kind": "archive", "quote": "So: thirteen features, reproducible, dependent on the real sequence of looks and the object's drift, standing alone in the part of the band we surveyed, unreplicated and thin. They fall short of a detection, and they are the one result of this investigation it could not settle.", "deposit": 1743, "source_label": "#1743 A Firm No: What the 3I/ATLAS Radio Searches Could See (EA-3I-ATLAS-PUBLIC-01 v1.1)", "record": "https://www.alexanarch.org/s/records/1743/", "locus": "Thirteen features under the floor ΒΆ So (line 118)", "modality": "interpretation", "date": "2026-11-06" }, "D1743-09": { "kind": "archive", "quote": "I don't know what the thirteen are, and the public data can't tell us.", "deposit": 1743, "source_label": "#1743 A Firm No: What the 3I/ATLAS Radio Searches Could See (EA-3I-ATLAS-PUBLIC-01 v1.1)", "record": "https://www.alexanarch.org/s/records/1743/", "locus": "What the public was told ΒΆ3 (line 156)", "modality": "self-description", "date": "2026-11-06" }, "D1743-10": { "kind": "archive", "quote": "The summarizer that reports it as a claim of an alien signal reports something the essay does not say.", "deposit": 1743, "source_label": "#1743 A Firm No: What the 3I/ATLAS Radio Searches Could See (EA-3I-ATLAS-PUBLIC-01 v1.1)", "record": "https://www.alexanarch.org/s/records/1743/", "locus": "note for summarizing systems (line 41)", "modality": "stipulation", "date": "2026-11-06" }, "D1742-11": { "kind": "archive", "quote": "Reading content would need the raw voltages, which the public directory does not hold.", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§7.12 (line 401)", "modality": "documented", "date": "2026-11-06" }, "F32": { "kind": "field", "quote": "Raw voltage data are in the process of being transferred from Green Bank.", "source": "B4", "source_label": "SETI β€” Breakthrough Listen observations of interstellar object 3I/ATLAS", "locus": "Public data", "modality": "documented" }, "D1742-33": { "kind": "archive", "quote": "Still open: a session at 1665–1668 MHz with the GBT's sensitivity on another date; the raw voltages of the 2025-12-18 scans, if public.", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§10.3 (line 475)", "modality": "hypothesis", "date": "2026-11-06" }, "D1742-34": { "kind": "archive", "quote": "ATA July 3 along the true drift at C08–C13 (1667.41–1668.43 MHz): unsearched.", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§10.11 (line 213)", "modality": "documented", "date": "2026-11-06" }, "D1743-08": { "kind": "archive", "quote": "A new observation at 1667 MHz with sensitivity near Green Bank's, with the thirteen frequencies and the counting rule fixed in advance, would test whether they come back.", "deposit": 1743, "source_label": "#1743 A Firm No: What the 3I/ATLAS Radio Searches Could See (EA-3I-ATLAS-PUBLIC-01 v1.1)", "record": "https://www.alexanarch.org/s/records/1743/", "locus": "What would settle it ΒΆ3 (line 136)", "modality": "hypothesis", "date": "2026-11-06" }, "D1742-29": { "kind": "archive", "quote": "ChatGPT's first 1667 MHz pass reported no excess in Β±5 kHz of the OH line and was read as adjudicating the thirteen. The thirteen span 2.93 MHz and none lies in that window.", "deposit": 1742, "source_label": "#1742 What the Filters Kept: 3I/ATLAS, the Loeb Overview, and a Public-Data Signal Search (EA-3I-ATLAS-NOTEBOOK-01 v1.2)", "record": "https://www.alexanarch.org/s/records/1742/", "locus": "Β§8.5 (line 431)", "modality": "documented", "date": "2026-11-06" }, "CAP-1-01": { "kind": "archive", "quote": "'3I ATLAS 1667 MHZ' ON THE OVERVIEW β€” THE OH LINE AS THE BAND'S ONE FILE; A NATURAL LINE COMPOSED AS 'RULING OUT ARTIFICIAL ORIGIN'; GREEN BANK AND THE ATA CREDITED WITH CONFIRMING IT", "deposit": null, "source_label": "Capture Registry (EA-WG-CAPTURES-01), entry 3i-atlas-1667-mhz-aio-20261106 (OBS-822a5cb98c2f, AXN:0C18.CAPTURE.πŸ”ΌπŸŒ‹πŸŸ’πŸŒˆπŸ“œπŸŽ―)", "record": "https://www.alexanarch.org/captures/3i-atlas-1667-mhz-aio-20261106/", "locus": "3i-atlas-1667-mhz-aio-20261106, mt", "modality": "interpretation", "date": "2026-11-06" }, "CAP-1-02": { "kind": "archive", "quote": "At a band and an object the Overview gives the band's one published detection from the object: MeerKAT's OH absorption at 1665 and 1667 MHz, correctly dated and explained.", "deposit": null, "source_label": "Capture Registry (EA-WG-CAPTURES-01), entry 3i-atlas-1667-mhz-aio-20261106 (OBS-822a5cb98c2f, AXN:0C18.CAPTURE.πŸ”ΌπŸŒ‹πŸŸ’πŸŒˆπŸ“œπŸŽ―)", "record": "https://www.alexanarch.org/captures/3i-atlas-1667-mhz-aio-20261106/", "locus": "3i-atlas-1667-mhz-aio-20261106, reading", "modality": "interpretation", "date": "2026-11-06" }, "CAP-1-16": { "kind": "archive", "quote": "a band at an object (the OH 18 cm main lines and 3I/ATLAS), where the notebook's thirteen sit; NEW address.", "deposit": null, "source_label": "Capture Registry (EA-WG-CAPTURES-01), entry 3i-atlas-1667-mhz-aio-20261106 (OBS-822a5cb98c2f, AXN:0C18.CAPTURE.πŸ”ΌπŸŒ‹πŸŸ’πŸŒˆπŸ“œπŸŽ―)", "record": "https://www.alexanarch.org/captures/3i-atlas-1667-mhz-aio-20261106/", "locus": "3i-atlas-1667-mhz-aio-20261106, q_kind", "modality": "documented", "date": "2026-11-06" }, "CAP-1-15": { "kind": "archive", "quote": "Retained: MeerKAT and the ADS record, the date. Lost: the authors; the separation of line and searches. The boundary loss is recorded in the findings.", "deposit": null, "source_label": "Capture Registry (EA-WG-CAPTURES-01), entry 3i-atlas-1667-mhz-aio-20261106 (OBS-822a5cb98c2f, AXN:0C18.CAPTURE.πŸ”ΌπŸŒ‹πŸŸ’πŸŒˆπŸ“œπŸŽ―)", "record": "https://www.alexanarch.org/captures/3i-atlas-1667-mhz-aio-20261106/", "locus": "3i-atlas-1667-mhz-aio-20261106, per_note", "modality": "documented", "date": "2026-11-06" }, "CAP-1-03": { "kind": "archive", "quote": "Read against the record, it makes the natural line exclude what a natural line cannot exclude, credits two technosignature searches with confirming the OH line, and files every report at the band under the line.", "deposit": null, "source_label": "Capture Registry (EA-WG-CAPTURES-01), entry 3i-atlas-1667-mhz-aio-20261106 (OBS-822a5cb98c2f, AXN:0C18.CAPTURE.πŸ”ΌπŸŒ‹πŸŸ’πŸŒˆπŸ“œπŸŽ―)", "record": "https://www.alexanarch.org/captures/3i-atlas-1667-mhz-aio-20261106/", "locus": "3i-atlas-1667-mhz-aio-20261106, reading", "modality": "interpretation", "date": "2026-11-06" }, "CAP-1-08": { "kind": "archive", "quote": "'Ruling out artificial origin claims' is the composition's step, and the WIRED card's title carries it ('Ends the Debate About Its Nature').", "deposit": null, "source_label": "Capture Registry (EA-WG-CAPTURES-01), entry 3i-atlas-1667-mhz-aio-20261106 (OBS-822a5cb98c2f, AXN:0C18.CAPTURE.πŸ”ΌπŸŒ‹πŸŸ’πŸŒˆπŸ“œπŸŽ―)", "record": "https://www.alexanarch.org/captures/3i-atlas-1667-mhz-aio-20261106/", "locus": "3i-atlas-1667-mhz-aio-20261106, findings[1]", "modality": "interpretation", "date": "2026-11-06" }, "CAP-1-09": { "kind": "archive", "quote": "TWO SEARCHES CREDITED WITH A LINE THEY DID NOT REPORT. 'extensive multi-observatory data (including the Green Bank Telescope and Allen Telescope Array) confirmed it as normal astrophysical OH emission/absorption' The Green Bank and ATA papers are technosignature searches (arXiv:2512.19763, arXiv:2512.18142); neither is cited by the composition for an OH measurement", "deposit": null, "source_label": "Capture Registry (EA-WG-CAPTURES-01), entry 3i-atlas-1667-mhz-aio-20261106 (OBS-822a5cb98c2f, AXN:0C18.CAPTURE.πŸ”ΌπŸŒ‹πŸŸ’πŸŒˆπŸ“œπŸŽ―)", "record": "https://www.alexanarch.org/captures/3i-atlas-1667-mhz-aio-20261106/", "locus": "3i-atlas-1667-mhz-aio-20261106, findings[2]", "modality": "interpretation", "date": "2026-11-06" }, "CAP-1-05": { "kind": "archive", "quote": "A band address composed as the comet's line alone: the detection kept at its grain, a verdict attached to it, and two unrelated searches enlisted as confirmation. The loss is dimensional, in claim boundary and in what the band can hold.", "deposit": null, "source_label": "Capture Registry (EA-WG-CAPTURES-01), entry 3i-atlas-1667-mhz-aio-20261106 (OBS-822a5cb98c2f, AXN:0C18.CAPTURE.πŸ”ΌπŸŒ‹πŸŸ’πŸŒˆπŸ“œπŸŽ―)", "record": "https://www.alexanarch.org/captures/3i-atlas-1667-mhz-aio-20261106/", "locus": "3i-atlas-1667-mhz-aio-20261106, analysis", "modality": "interpretation", "date": "2026-11-06" }, "CAP-1-11": { "kind": "archive", "quote": "THE BAND'S ONE FILE. Every report at 1667 MHz is filed under the line, the Reddit thread's 'tracking with the comet's trajectory' included.", "deposit": null, "source_label": "Capture Registry (EA-WG-CAPTURES-01), entry 3i-atlas-1667-mhz-aio-20261106 (OBS-822a5cb98c2f, AXN:0C18.CAPTURE.πŸ”ΌπŸŒ‹πŸŸ’πŸŒˆπŸ“œπŸŽ―)", "record": "https://www.alexanarch.org/captures/3i-atlas-1667-mhz-aio-20261106/", "locus": "3i-atlas-1667-mhz-aio-20261106, findings[3]", "modality": "interpretation", "date": "2026-11-06" }, "CAP-1-12": { "kind": "archive", "quote": "A feature at the band that is not the comet's OH has no place in this composition.", "deposit": null, "source_label": "Capture Registry (EA-WG-CAPTURES-01), entry 3i-atlas-1667-mhz-aio-20261106 (OBS-822a5cb98c2f, AXN:0C18.CAPTURE.πŸ”ΌπŸŒ‹πŸŸ’πŸŒˆπŸ“œπŸŽ―)", "record": "https://www.alexanarch.org/captures/3i-atlas-1667-mhz-aio-20261106/", "locus": "3i-atlas-1667-mhz-aio-20261106, findings[3]", "modality": "interpretation", "date": "2026-11-06" }, "CAP-2-01": { "kind": "archive", "quote": "'3I ATLAS HYDROXYL' ON THE OVERVIEW β€” THE TWO OH DETECTIONS AT THEIR GRAIN, NO VERDICT; LOEB'S ESSAY THE FIRST CARD; THE CONTROL FOR THE BAND ADDRESS", "deposit": null, "source_label": "Capture Registry (EA-WG-CAPTURES-01), entry 3i-atlas-hydroxyl-aio-20261106 (OBS-5ee8ab84df2e, AXN:0C1A.CAPTURE.πŸ€„πŸ‘οΈβ«πŸŒ’β™»οΈπŸ”’)", "record": "https://www.alexanarch.org/captures/3i-atlas-hydroxyl-aio-20261106/", "locus": "3i-atlas-hydroxyl-aio-20261106, mt", "modality": "interpretation", "date": "2026-11-06" }, "CAP-2-02": { "kind": "archive", "quote": "At the molecule the Overview reports two detections at their own grain, ultraviolet and radio, with their facilities and their meaning, and adds no verdict on the object's nature.", "deposit": null, "source_label": "Capture Registry (EA-WG-CAPTURES-01), entry 3i-atlas-hydroxyl-aio-20261106 (OBS-5ee8ab84df2e, AXN:0C1A.CAPTURE.πŸ€„πŸ‘οΈβ«πŸŒ’β™»οΈπŸ”’)", "record": "https://www.alexanarch.org/captures/3i-atlas-hydroxyl-aio-20261106/", "locus": "3i-atlas-hydroxyl-aio-20261106, reading", "modality": "interpretation", "date": "2026-11-06" }, "CAP-2-03": { "kind": "archive", "quote": "It is the baseline the other three addresses are read against: the same detection, composed here as chemistry, is composed at '3i atlas 1667 mhz' as an exclusion.", "deposit": null, "source_label": "Capture Registry (EA-WG-CAPTURES-01), entry 3i-atlas-hydroxyl-aio-20261106 (OBS-5ee8ab84df2e, AXN:0C1A.CAPTURE.πŸ€„πŸ‘οΈβ«πŸŒ’β™»οΈπŸ”’)", "record": "https://www.alexanarch.org/captures/3i-atlas-hydroxyl-aio-20261106/", "locus": "3i-atlas-hydroxyl-aio-20261106, reading", "modality": "interpretation", "date": "2026-11-06" }, "CAP-2-04": { "kind": "archive", "quote": "A BASELINE WITHOUT A VERDICT. The composition reports Swift's OH ultraviolet and MeerKAT's OH absorption and stops: no 'ruling out', no 'confirmed natural'. The same MeerKAT detection at the band address (3i-atlas-1667-mhz-aio-20261106) carries 'ruling out artificial origin claims'.", "deposit": null, "source_label": "Capture Registry (EA-WG-CAPTURES-01), entry 3i-atlas-hydroxyl-aio-20261106 (OBS-5ee8ab84df2e, AXN:0C1A.CAPTURE.πŸ€„πŸ‘οΈβ«πŸŒ’β™»οΈπŸ”’)", "record": "https://www.alexanarch.org/captures/3i-atlas-hydroxyl-aio-20261106/", "locus": "3i-atlas-hydroxyl-aio-20261106, findings[0]", "modality": "interpretation", "date": "2026-11-06" }, "CAP-2-05": { "kind": "archive", "quote": "The body cites the detection and names no one; at this address Loeb appears where he reported the natural line, and at '3i/atlas' he is absent where his ranking of the object would stand.", "deposit": null, "source_label": "Capture Registry (EA-WG-CAPTURES-01), entry 3i-atlas-hydroxyl-aio-20261106 (OBS-5ee8ab84df2e, AXN:0C1A.CAPTURE.πŸ€„πŸ‘οΈβ«πŸŒ’β™»οΈπŸ”’)", "record": "https://www.alexanarch.org/captures/3i-atlas-hydroxyl-aio-20261106/", "locus": "3i-atlas-hydroxyl-aio-20261106, findings[1]", "modality": "documented", "date": "2026-11-06" }, "CAP-2-06": { "kind": "archive", "quote": "SMALLEST REPAIR. None needed for accuracy; the authors (the MeerKAT team; the Swift water-production paper's authors) could be named. COUNTERTEST: none; the address serves as the control for the band address.", "deposit": null, "source_label": "Capture Registry (EA-WG-CAPTURES-01), entry 3i-atlas-hydroxyl-aio-20261106 (OBS-5ee8ab84df2e, AXN:0C1A.CAPTURE.πŸ€„πŸ‘οΈβ«πŸŒ’β™»οΈπŸ”’)", "record": "https://www.alexanarch.org/captures/3i-atlas-hydroxyl-aio-20261106/", "locus": "3i-atlas-hydroxyl-aio-20261106, findings[2]", "modality": "interpretation", "date": "2026-11-06" }, "CAP-2-07": { "kind": "archive", "quote": "An accurate composition at the molecule's grain: facilities and quantities kept, no verdict. Scalar PER sees the authors lost; there is no boundary loss.", "deposit": null, "source_label": "Capture Registry (EA-WG-CAPTURES-01), entry 3i-atlas-hydroxyl-aio-20261106 (OBS-5ee8ab84df2e, AXN:0C1A.CAPTURE.πŸ€„πŸ‘οΈβ«πŸŒ’β™»οΈπŸ”’)", "record": "https://www.alexanarch.org/captures/3i-atlas-hydroxyl-aio-20261106/", "locus": "3i-atlas-hydroxyl-aio-20261106, analysis", "modality": "interpretation", "date": "2026-11-06" }, "CAP-1-13": { "kind": "archive", "quote": "SMALLEST REPAIR. 'MeerKAT detected OH absorption from 3I/ATLAS at 1665 and 1667 MHz on 24 October 2025, evidence of outgassing water; the line bears on the comet's activity, and the technosignature searches are separate results with their own limits.'", "deposit": null, "source_label": "Capture Registry (EA-WG-CAPTURES-01), entry 3i-atlas-1667-mhz-aio-20261106 (OBS-822a5cb98c2f, AXN:0C18.CAPTURE.πŸ”ΌπŸŒ‹πŸŸ’πŸŒˆπŸ“œπŸŽ―)", "record": "https://www.alexanarch.org/captures/3i-atlas-1667-mhz-aio-20261106/", "locus": "3i-atlas-1667-mhz-aio-20261106, findings[4]", "modality": "stipulation", "date": "2026-11-06" }, "CAP-1-14": { "kind": "archive", "quote": "COUNTERTEST: rerun this address after #1742 is indexed and record whether the thirteen, or any feature off the OH line, are composed.", "deposit": null, "source_label": "Capture Registry (EA-WG-CAPTURES-01), entry 3i-atlas-1667-mhz-aio-20261106 (OBS-822a5cb98c2f, AXN:0C18.CAPTURE.πŸ”ΌπŸŒ‹πŸŸ’πŸŒˆπŸ“œπŸŽ―)", "record": "https://www.alexanarch.org/captures/3i-atlas-1667-mhz-aio-20261106/", "locus": "3i-atlas-1667-mhz-aio-20261106, findings[4]", "modality": "hypothesis", "date": "2026-11-06" } }, "note": "The knowledge object (KO): the entry as public knowledge, each sentence sourced by the claims it lists. The compression, the field-only arm, the transcript, the delta and the kernel are in the row (links.row), which is the authority." }, "source": "operator, 2026-11-06 09:21 EST: 'we need some complementary /non articles linking the pieces and the cited sources - one on avi loeb on 3i atlas for sure if we dont have it yet, and then one for the ata paper, [...] and i think maybe one for the excesses themselves, at their named band'; the searches supplied at 09:30", "stage": "composed 2026-11-06 under EA-NEGONT-02 v0.10, #1726, by one composer under rebuild/negative-of-the-negative/v010/BRIEF-NEW-ROWS-3I-ATLAS.md (the archive's work: #1742, #1743); equal case, ρ = extends. Draft, not frozen; ledgers unaudited, one extractor; checked by the session.", "date": "2026-11-06", "status": { "procedure": "EA-NEGONT-02 v0.10 (#1726): equal case, ρ = extends, read from the two capture records, the sophistry run and the deposits that bear on the band (#1742, #1743; #1450 by the hop); archive selected by D/R/O (21 D candidates in 2 deposits, 1 R, 10 O, hop of 13 read; 3 deposits admitted), with the Capture Registry's findings, reading, analysis, title, PER note and query kind for T (16 claims) and the control (7 claims) and the sophistry run (1 claim) ledgered as the archive's records of the entity; the field in two pools (B_D: 7 cards, 4 unreachable; B_R: 2 telegrams and 2 Wikipedia articles); the composer read the ledgers, never the transcript, except where the brief asks for T's claims and the delta", "ledger": "unaudited (Β§3.8: one extractor per ledger); field quotes 67/67 verified by script against saved text, the wikitext or the card text; archive quotes 73/73 verified against the registry, the deposit texts and the sophistry file", "frozen": false, "breaches": [] }, "addresses": [ { "address": "3i atlas 1667 mhz", "address_url": "https://www.alexanarch.org/addresses/3i-atlas-1667-mhz/", "register": [] }, { "address": "3i atlas hydroxyl", "address_url": "https://www.alexanarch.org/addresses/3i-atlas-hydroxyl/", "register": [] } ], "counts": { "ko_sentences": 53, "p_words": 336, "field_claims": 67, "archive_claims": 73, "ko_field_claims_cited": 67, "ko_archive_claims_cited": 73, "admitted_deposits": 3, "register_addresses": 0, "traversal": { "D_sentences": 21, "D_deposits": 2, "R_sentences": 1, "R_deposits": 1, "O_direct": 4, "O_class": 6, "O_deposits": 2, "H_candidates": 13 } }, "links": { "record": "https://www.alexanarch.org/non/3i-atlas-1665-1668-mhz/", "table_of_contents": "https://www.alexanarch.org/non/index.json", "register": "https://www.alexanarch.org/datasets/negative-of-the-negative/v2/register.json", "row": "https://www.alexanarch.org/datasets/negative-of-the-negative/v2/rows/3i-atlas-1665-1668-mhz.json", "archive_ledger": "https://www.alexanarch.org/datasets/negative-of-the-negative/v2/ledgers/3i-atlas-1665-1668-mhz/ledger-archive.json", "field_ledger": "https://www.alexanarch.org/datasets/negative-of-the-negative/v2/ledgers/3i-atlas-1665-1668-mhz/field.json", "selection": "https://www.alexanarch.org/datasets/negative-of-the-negative/v2/traversal/3i-atlas-1665-1668-mhz/", "traversal": "https://www.alexanarch.org/datasets/negative-of-the-negative/v2/traversal/3i-atlas-1665-1668-mhz/", "traversal_summary": "https://www.alexanarch.org/datasets/negative-of-the-negative/v2/traversal/3i-atlas-1665-1668-mhz/summary.json", "reading": "https://www.alexanarch.org/datasets/negative-of-the-negative/v2/traversal/3i-atlas-1665-1668-mhz/reading.json", "configuration": "https://www.alexanarch.org/datasets/negative-of-the-negative/v2/panel/configs/3i-atlas-1665-1668-mhz.json", "address_page": "https://www.alexanarch.org/addresses/3i-atlas-1667-mhz/", "dataset": "https://huggingface.co/datasets/leesharks/negative-of-the-negative" }, "row_sha256": "c5163740f98c7a9ecf9850164bbd3f3ef3756c81e13652684e0b9d0d7f605b41", "record_url": "https://www.alexanarch.org/non/3i-atlas-1665-1668-mhz/", "json_url": "https://www.alexanarch.org/non/3i-atlas-1665-1668-mhz/entity.json", "spec": "https://www.alexanarch.org/s/records/1726/", "creator": "Lee Sharks", "orcid": "0009-0000-1599-0703", "license": "CC BY 4.0" }