DOI: 10.5068/d1309d
title: Data from: A search for technosignatures from 14 planetary systems in the Kepler field with the Green Bank Telescope at 1.15–1.73 GHz

description: This dataset describes candidate signal detections obtained at the Green
 Bank Telescope in 2016 and reprocessed with the 2020 UCLA SETI Group data
 processing pipeline. Analysis of Kepler mission data suggests that the
 Milky Way includes billions of Earth-sized planets in the habitable zone
 of their host stars. Current technology enables the detection of
 technosignatures emitted from a large fraction of the Galaxy. We describe
 a search for technosignatures that is sensitive to Arecibo-class
 transmitters located within ∼420 ly of Earth and transmitters that are
 1000 times more effective than Arecibo within ∼13000 ly of Earth. Our
 observations focused on 14 planetary systems in the Kepler field and used
 the L-band receiver (1.15–1.73 GHz) of the 100 m diameter Green Bank
 Telescope. Each source was observed for a total integration time of 5
 minutes. We obtained power spectra at a frequency resolution of 3 Hz and
 examined narrowband signals with Doppler drift rates between ±9 Hz s −1 .
 We flagged any detection with a signal-to-noise ratio in excess of 10 as a
 candidate signal and identified approximately 850,000 candidates. Most
 (99%) of these candidate signals were automatically classified as
 human-generated radio-frequency interference (RFI). A large fraction
 (&gt;99%) of the remaining candidate signals were also flagged as
 anthropogenic RFI because they have frequencies that overlap those used by
 global navigation satellite systems, satellite downlinks, or other
 interferers detected in heavily polluted regions of the spectrum. All 19
 remaining candidate signals were scrutinized and none were attributable to
 an extraterrestrial source.
description: Please see journal article for methods.
description: The field descriptions are as follows: ID: a unique integer identifier
 for the signal NAME: the name of the
 source SCAN: the scan index number (1, 2) for the
 source MJD: the Modified Julian Date at the start of
 the scan FREQ: the frequency (Hz) at the start of the
 scan DFDT: the rate of change in frequency
 (Hz/s) Z: the signal power integrated over the scan
 duration aka Z score (standard deviations of the noise)
 BW: an estimate of the bandwidth (FWHM) of the signal
 (Hz) FSNR: a flag set to Y if signal power exceeds
 detection threshold FDOP: a flag set to Y if DFDT
 is <strong style="font-weight:bold;">not</strong> zero
 FBTH: a flag set to Y if signal is detected in both scans of
 this source FOTH: a flag set to Y if signal
 is <strong style="font-weight:bold;">not</strong> detected in
 scans of other sources FAND: a flag set to Y if
 FSNR=FDOP=FBTH=FOTH=Y PARTNER: the ID of the signal
 in a subsequent scan of this source, if known
 RFICODE: an identifier for the probable source of RFI
 NOTES: additional notes The
 field names and types are as follows: <pre>
 +---------+--------------+ | Field | Type | +---------+--------------+ |
 ID | int(11) | | NAME | varchar(50) | | SCAN | int(4) | | MJD |
 double(16,8) | | FREQ | double(20,6) | | DFDT | double(14,8) | | Z |
 double(15,3) | | BW | double(8,1) | | FSNR | char(1) | | FDOP | char(1) |
 | FBTH | char(1) | | FOTH | char(1) | | FAND | char(1) | | PARTNER |
 int(11) | | RFICODE | char(5) | | NOTES | text |
 +---------+--------------+</pre>