{
 "row": "3i-atlas-1665-1668-mhz",
 "address": "3i atlas 1667 mhz",
 "entity": "3I/ATLAS at 1665–1668 MHz: the band of the hydroxyl (OH) 18 cm main lines (rest 1665.4018 and 1667.3590 MHz) at the interstellar comet 3I/ATLAS (C/2025 N1), where MeerKAT detected the comet's OH absorption on 24 October 2025 (ATel #17473; Pisano, Smirnov, Ivchenko, Roth and Buchner) and OH absorption and emission in November (ATel #17499), where MeerKAT's BLUSE search set a 0.17 W limit over 900–1670 MHz, and where the archive's notebook (#1742 §7) holds thirteen comet-frame features in Green Bank coarse channel 7 (1665.53–1668.46 MHz, 2025-12-18), off the comet-frame OH lines (#1742 §7.5)",
 "procedure": "EA-NEGONT-02 v0.7 §3.4 (D/R/O), working; not frozen",
 "config": {
  "row": "3i-atlas-1665-1668-mhz",
  "address": "3i atlas 1667 mhz",
  "entity": "3I/ATLAS at 1665–1668 MHz: the band of the hydroxyl (OH) 18 cm main lines (rest 1665.4018 and 1667.3590 MHz) at the interstellar comet 3I/ATLAS (C/2025 N1), where MeerKAT detected the comet's OH absorption on 24 October 2025 (ATel #17473; Pisano, Smirnov, Ivchenko, Roth and Buchner) and OH absorption and emission in November (ATel #17499), where MeerKAT's BLUSE search set a 0.17 W limit over 900–1670 MHz, and where the archive's notebook (#1742 §7) holds thirteen comet-frame features in Green Bank coarse channel 7 (1665.53–1668.46 MHz, 2025-12-18), off the comet-frame OH lines (#1742 §7.5)",
  "row_type": "C (public entity on which the archive bears: a radio band at an astronomical object)",
  "aliases": [
   {
    "pattern": "\\b166[5-8](\\.\\d+)?\\s?MHz\\b",
    "flags": ""
   },
   {
    "pattern": "\\b1665/1667\\b",
    "flags": ""
   },
   {
    "pattern": "\\b1\\.66[5-8]\\d*\\s?GHz\\b",
    "flags": ""
   },
   {
    "pattern": "\\bhydroxyl\\b",
    "flags": "i"
   },
   {
    "pattern": "\\bOH (absorption|line|lines|emission|main lines|radicals?|channel|window|windows)\\b",
    "flags": ""
   },
   {
    "pattern": "\\b18[- ]cm\\b",
    "flags": ""
   }
  ],
  "classes": [
   {
    "term": "radio technosignature searches of 3I/ATLAS (searches that include the band)",
    "pattern": "\\b(technosignatures?|Breakthrough Listen|BLUSE)\\b",
    "flags": "",
    "basis": "field: B4 (Breakthrough Listen's 3I/ATLAS page, card 4: 'In parallel with these observations, the BLUSE (Breakthrough Listen User Supplied Equipment) computer at MeerKAT searched the data for technosignatures.'; 'No artificial radio emission was detected at a limit of 0.17 W over the 900 - 1670 MHz range'); B9 (ATel #17499: 'we established a detection limit of 0.17 W over the 900-1670 MHz range'). T's body names the Green Bank Telescope and the Allen Telescope Array at the band."
   },
   {
    "term": "spectral lines of comets in radio (the OH lines as cometary activity)",
    "pattern": "\\b(spectral lines?|absorption lines?|radio lines?|line emission)\\b",
    "flags": "i",
    "basis": "field: B2 (WIRED: 'These OH spectral lines have been detected in nebulae, comets, and star-forming regions.'); B7 (Futura: 'These hydroxyl radicals tend to absorb radio waves at two specific frequencies: 1665 and 1667 megahertz'); B10 (Wikipedia, Hydroxyl radical: '18 cm absorption lines of the hydroxyl (HO • ) radical')."
   }
  ],
  "classes_note": "Two classes, each sourced by the field B. (1) radio technosignature searches of 3I/ATLAS that include the band: B4 (card 4, the BLUSE search at 900–1670 MHz; the ATA at 1–9 GHz; the GBT at 1–12 GHz), B9 (ATel #17499); T names the Green Bank Telescope and the ATA. (2) spectral lines of comets in radio: B2, B7, B10. Aliases: the band's frequencies as the archive and the field write them (1665–1668 MHz, 1665/1667, 1.665–1.668 GHz), the molecule (hydroxyl; OH with a line word, since 'OH' alone is a common string), and the 18 cm wavelength. Admission by reading (§3.4): D where a deposit says something of the band at 3I/ATLAS (the OH detection, the thirteen, a search at the band); a sentence on hydroxyl elsewhere (the atmosphere, chemistry) or on 1667 MHz at another object is read and not admitted; O-class where a sentence applies an archive category to one of the two classes. The thirteen are the archive's own features at the band (#1742 §7); the comet's OH line, as an entity of its own, is a neighbour (the disambiguation).",
  "exclude_deposits": [],
  "notes": "entity-keyed pass, 2026-11-06, on the brief rebuild/negative-of-the-negative/v010/BRIEF-NEW-ROWS-3I-ATLAS.md (with v010/BRIEF-NEW-ROW-LAYER.md and v09/BRIEF-NEW-ROW-AGGREGATOR.md, -LABOR.md, -LEFT.md); address '3i atlas 1667 mhz' (3i-atlas-1667-mhz-aio-20261106, OBS-822a5cb98c2f, ADDR-5cc034f5e6d0), Google AI Overview (expanded), signed out, incognito; control address '3i atlas hydroxyl' (3i-atlas-hydroxyl-aio-20261106, OBS-5ee8ab84df2e). The archive's own records of the entity (the Capture Registry's findings, reading and analysis for both captures) are ledgered beside the deposits as CAP-1-NN and CAP-2-NN.",
  "hop_from": [
   1742,
   1743
  ]
 },
 "texts_scanned": 1737,
 "counts": {
  "D_sentences": 21,
  "D_deposits": 2,
  "R_sentences": 1,
  "R_deposits": 1,
  "O_direct": 4,
  "O_class": 6,
  "O_deposits": 2,
  "H_candidates": 13
 },
 "per_deposit": {
  "D": {
   "1742": 17,
   "1743": 4
  },
  "R": {
   "1742": 1
  },
  "O": {
   "1742": 8,
   "1743": 2
  }
 },
 "registry_entity_triples": [],
 "integrity_S5": [],
 "sha256": {
  "candidates-D.jsonl": "8600f7b1e813e8d55342cade3dadb4ff37313978f64e90f7f303846f02d219b8",
  "candidates-R.jsonl": "f9c8063b01335e86366fb0adb41c79a2f44b6217514d4275b2b2e65d5b62a33f",
  "candidates-O.jsonl": "313efcd25afe8199bb3b9ee717ed434b9013f4134664ab8dea65e07d09883138",
  "candidates-H.jsonl": "6697e9d882fe6ef4b9b74eecc009d4f053432e96f418e82ca023889c42b597ae"
 },
 "category_vocabulary": {
  "defines_concepts_and_lexical_mints": 11080
 },
 "note": "Candidates by string only. Admission by reading, recorded in the row's reading file; nothing here is admitted."
}