The Breakthrough Listen Search for Intelligent Life: Searching for Technosignatures in Observations of TESS Targets of Interest. (arXiv:2101.11137v2 [astro-ph.EP] UPDATED)

The Breakthrough Listen Search for Intelligent Life: Searching for Technosignatures in Observations of TESS Targets of Interest. (arXiv:2101.11137v2 [astro-ph.EP] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+Traas_R/0/1/0/all/0/1">Raffy Traas</a> (1 and 2), <a href="http://arxiv.org/find/astro-ph/1/au:+Croft_S/0/1/0/all/0/1">Steve Croft</a> (2 and 3), <a href="http://arxiv.org/find/astro-ph/1/au:+Gajjar_V/0/1/0/all/0/1">Vishal Gajjar</a> (2), <a href="http://arxiv.org/find/astro-ph/1/au:+Isaacson_H/0/1/0/all/0/1">Howard Isaacson</a> (2 and 4), <a href="http://arxiv.org/find/astro-ph/1/au:+Lebofsky_M/0/1/0/all/0/1">Matt Lebofsky</a> (2), <a href="http://arxiv.org/find/astro-ph/1/au:+MacMahon_D/0/1/0/all/0/1">David H. E. MacMahon</a> (2), <a href="http://arxiv.org/find/astro-ph/1/au:+Perez_K/0/1/0/all/0/1">Karen Perez</a> (5), <a href="http://arxiv.org/find/astro-ph/1/au:+Price_D/0/1/0/all/0/1">Danny C. Price</a> (2 and 6), <a href="http://arxiv.org/find/astro-ph/1/au:+Sheikh_S/0/1/0/all/0/1">Sofia Sheikh</a> (2 and 7), <a href="http://arxiv.org/find/astro-ph/1/au:+Siemion_A/0/1/0/all/0/1">Andrew P. V. Siemion</a> (2 and 3 and 8 and 9), <a href="http://arxiv.org/find/astro-ph/1/au:+Smith_S/0/1/0/all/0/1">Shane Smith</a> (10), <a href="http://arxiv.org/find/astro-ph/1/au:+Drew_J/0/1/0/all/0/1">Jamie Drew</a> (11), <a href="http://arxiv.org/find/astro-ph/1/au:+Worden_S/0/1/0/all/0/1">S. Pete Worden</a> (11) ((1) University of Wisconsin-La Crosse, (2) UC Berkeley, (3) SETI Institute, (4) University of Southern Queensland, (5) Columbia University, (6) Swinburne University of Technology, (7) Pennsylvania State University, (8) Radboud University, (9) University of Malta, (10) Hillsdale College, (11) Breakthrough Initiatives)

Exoplanetary systems are prime targets for the Search for Extraterrestrial
Intelligence (SETI). With the recent uptick in the identification of candidate
and confirmed exoplanets through the work of missions like the Transiting
Exoplanet Survey Satellite (TESS), we are beginning to understand that
Earth-like planets are common. In this work, we extend the Breakthrough Listen
(BL) search for extraterrestrial intelligence to include targeted searches of
stars identified by TESS as potential exoplanet hosts. We report on 113 30-min
cadence observations collected for 28 targets selected from the TESS Input
Catalog (TIC) from among those identified as containing signatures of
transiting planets. The targets were searched for narrowband signals from 1-11
GHz using the turboSETI pipeline architecture modified for compatibility with
the Google Cloud environment. Data were searched for drift rates of +/-4 Hz/s
above a minimum signal-to-noise threshold of 10, following the parameters of
previous searches conducted by Price et al. (2020) and Enriquez et al. (2017).
The observations presented in this work establish some of the deepest limits to
date over such a wide band (1-11 GHz) for life beyond Earth. We determine that
fewer than 12.72% of the observed targets possess transmitters operating at
these frequencies with an Equivalent Isotropic Radiated Power (EIRP) greater
than our derived threshold of 4.9*10^(14) W.

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