J/AJ/165/61ivo://CDS.VizieR/J/AJ/165/61doi:10.26093/cds/vizier.51650061CDSSheikh S.Z.Kanodia S.Lubar E.Bowman W.P.Canas C.I.Gilbertson C.,MacDonald M.G.Wright J.MacMahon D.Croft S.Price D.Siemion A.,Drew J.Worden S.P.Trenholm E.Graduate SETI Course at Penn State,The Breakthrough Listen Initiative2023-09-27T06:48:15Z2023-06-13T07:14:03ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frexoplanetsradio-spectroscopyAgrowing avenue for determining the prevalence of life beyond Earth is to search for "technosignatures" from extraterrestrial intelligences/agents. Technosignatures require significant energy to be visible across interstellar space and thus intentional signals might be concentrated in frequency, in time, or in space, to be found in mutually obvious places. Therefore, it could be advantageous to search for technosignatures in parts of parameter space that are mutually derivable to an observer on Earth and a distant transmitter. In this work, we used the L-band (1.1-1.9GHz) receiver on the Robert C. Byrd Green Bank Telescope to perform the first technosignature search presynchronized with exoplanet transits, covering 12 Kepler systems. We used the Breakthrough Listen turboSETI pipeline to flag narrowband hits (~3Hz) using a maximum drift rate of {+/-}614.4Hz/s and a signal-to-noise threshold of 5-the pipeline returned ~3.4x105 apparently-localized features. Visual inspection by a team of citizen scientists ruled out 99.6% of them. Further analysis found two signals of interest that warrant follow up, but no technosignatures. If the signals of interest are not redetected in future work, it will imply that the 12 targets in the search are not producing transit-aligned signals from 1.1 to 1.9GHz with transmitter powers >60 times that of the former Arecibo radar. This search debuts a range of innovative technosignature techniques: citizen science vetting of potential signals of interest, a sensitivity-aware search out to extremely high drift rates, a more flexible method of analyzing on-off cadences, and an extremely low signal-to-noise threshold.2023AJ....165...61Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/165/61CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/767/94 : 1.1-1.9GHz SETI survey of KOIs. I. (Siemion+, 2013)J/AJ/152/181 : SETI observations of exoplanets with the ATA (Harp+, 2016)J/ApJ/822/86 : False positive probabilities Q1-Q17 DR24 KOIs (Morton+, 2016)J/ApJ/869/66 : Search for extraterrestrial intelligence with ATA (Harp+, 2018)J/AJ/161/55 : Observation of 31 G-stars at 1.5GHz with GBT (Margot+, 2021)J/A+A/658/A10 : 3C295 LOFAR, MERLIN and VLA images (Bonnassieux+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/165/61https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/165/61http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/165/61https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/165/61https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/165/61http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/165/61GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/165/61/table1 (Stellar and planetary properties for the twelve transiting Kepler planets observed in this work)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/165/61/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/165/61/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/165/61/table1?GETtext/xml+votable180.050000true282.250208344.92110.0055555555555555566/14587 14775 14918 14969-14970 14974 15106 15133 15137 15144 15157 15168https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/165/61?format=asciiRadiodefaultJ/AJ/165/61/table1Stellar and planetary properties for the twelve transiting Kepler planets observed in this workSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPlanetPlanetmeta.id;meta.maincharRAJ2000[18/19] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000[38/51] Degree of Declination (J2000)pos.eq.dec;meta.mainDist[120/992] Distance (1)pcpos.distanceintRad[0.79/12.2] Radius, Earth units (1)(6.3781x10+6m)phys.size.radiusfloatE_Rad[0.04/2] Upper uncertainty in Rad (1)(6.3781x10+6m)stat.error;stat.maxfloate_Rad[-0.8/-0.04] Lower uncertainty in Rad (1)(6.3781x10+6m)stat.errorfloatPer[0.89/24.6] Orbital period, days (1)dtime.periodfloatBJD[964/1007] T0; BJD-2450000 (1)dtime.epochfloatTeq[510/2080] Equivalent temperature (1)Kphys.temperatureintTeff[3464/5703] Effective temperature (1)Kphys.temperature.effectiveint