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3i atlas ata drift rate filter


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In the SETI Institute's Allen Telescope Array (ATA) search for radio technosignatures from the interstellar object 3I/ATLAS, researchers applied a drift rate filter of 0.05 to 1.5 Hz/s across all frequencies.


Berkeley SETI
Key Details of the Filter
Filtered Range: 0.05 to 1.5 Hz/s


Berkeley SETI
Purpose: To capture the expected frequency shift (acceleration) caused by the relative motion between 3I/ATLAS and Earth, while accounting for uncertainties like potential object rotation or tumbling.


Berkeley SETI
 +1
Baseline Calculation: At the lowest tuning frequency (1336 MHz), the calculated minimum drift rate for 3I/ATLAS was approximately 0.15 Hz/s, prompting a middle-ground range to filter out excessive radio frequency interference (RFI) without missing real signals.


Berkeley SETI
Impact: Applying this drift-rate limit—along with initial frequency blanking—reduced the initial set of nearly 74 million narrowband hits (detected via the bliss pipeline) down to about 1.9–2 million hits before further localization and visual inspection.


IOPscience
 +1
(Note: Other observatories like FAST utilized a maximum drift rate up to 2 Hz/s in search routines, corresponding to similar relative acceleration models).


IOPscience
Would you like more details on how the SETI Institute's ATA study handled RFI blanking or spatial localization with NBeamAnalysis?





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Berkeley SETI
https://seti.berkeley.edu
PDF
A Search for Radio Technosignatures from Interstellar Object 3I/ATLAS with the ...

by SZ Sheikh · Cited by 5 — At a center frequency of 8728 MHz the maximum drift rate of 3I/ATLAS would be 1.01 Hz/s. the minimum drift rate of 3I/ATLAS would be 0.15 Hz/s. ...
12 pages·808 KB

IOPscience
https://iopscience.iop.org
A Search for Radio Technosignatures from Interstellar Object 3I/ATLAS with the ...
by SZ Sheikh · 2026 · Cited by 5 — At a center frequency … the maximum drift rate of 3I/ATLAS would be 1.01 Hz s−1. the minimum drift rate of 3I/ATLAS would be 0.15 Hz s−1. We ...

Phys.org
https://phys.org
Interstellar object 3I/ATLAS reveals no technosignatures in seven-hour radio ...
Jun 3, 2026 — The team observed 3I/ATLAS for more than seven hours with the ATA, covering 1 to 9 gigahertz. This broad range allows scientists to search for ...
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Astrobiology Web
https://astrobiology.com
SETI Institute Looks for Signs of Technology in Interstellar Visitor 3I/ATLAS
Jun 4, 2026 — Applying blanking ranges and drift-rate limits significantly reduced dense clusters of hits (reducing the total number of hits by 97.4%)

arXiv
https://arxiv.org
PDF
Breakthrough Listen Observations of 3I/ATLAS with the Green Bank Telescope at ...
by B Jacobson-Bell · 2025 · Cited by 8 — The color-shaded regions give the range of drift rates expected from Earth's orbital motion and rotational motion and 3I/ATLAS's rotation at ...

The Brighter Side of News
https://www.thebrighterside.news
SETI checked 3I/ATLAS for alien signals — Here's what they found
Jun 6, 2026 — Across the survey, they filtered for hits between 0.05 and 1.5 hertz per second. This is a range broad enough to capture the known motion of 3I ...

IOPscience
https://iopscience.iop.org
Narrowband Radio Technosignature Search Toward 3I/ATLAS with FAST
by JK Li · 2026 · Cited by 2 — We also filter the hits by drift rate before potential candidate selection. The drift rates caused by the relative motion of the comet in the observation ...

Harvard University
https://ui.adsabs.harvard.edu
Photometric Analysis of the Interstellar Comet 3I/ATLAS During its Pre- ...
by M Wesołowski · 2026 — A consistent brightening trend was measured in all filters, with average rates ranging from 0.033 to 0.066 magnitudes per day, indicating a progressive ...
Missing: drift ‎| Show results with: drift

Reddit · r/spaceporn
630+ comments · 1 year ago
Timelapse of 3I/ATLAS, the Interstellar Object That Has a Harvard Professor ...

Correct. The new telescopes and surveys are expected to increase the detection rate by at least an order of magnitude.
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