Breakthrough Listen Follow-up of the Random Transiter (EPIC 249706694/HD 139139) with the Green Bank Telescope. (arXiv:1910.03711v1 [astro-ph.EP])

Breakthrough Listen Follow-up of the Random Transiter (EPIC 249706694/HD 139139) with the Green Bank Telescope. (arXiv:1910.03711v1 [astro-ph.EP])
<a href="http://arxiv.org/find/astro-ph/1/au:+Brzycki_B/0/1/0/all/0/1">Bryan Brzycki</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Siemion_A/0/1/0/all/0/1">Andrew P. V. Siemion</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Croft_S/0/1/0/all/0/1">Steve Croft</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Czech_D/0/1/0/all/0/1">Daniel Czech</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+DeBoer_D/0/1/0/all/0/1">David DeBoer</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+DeMarines_J/0/1/0/all/0/1">Julia DeMarines</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Drew_J/0/1/0/all/0/1">Jamie Drew</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Enriquez_J/0/1/0/all/0/1">J. Emilio Enriquez</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Gajjar_V/0/1/0/all/0/1">Vishal Gajjar</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Gizani_N/0/1/0/all/0/1">Nectaria Gizani</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Isaacson_H/0/1/0/all/0/1">Howard Isaacson</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lacki_B/0/1/0/all/0/1">Brian C. Lacki</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lebofsky_M/0/1/0/all/0/1">Matt Lebofsky</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+MacMahon_D/0/1/0/all/0/1">David H. E. MacMahon</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Pater_I/0/1/0/all/0/1">Imke de Pater</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Price_D/0/1/0/all/0/1">Daniel C. Price</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sheikh_S/0/1/0/all/0/1">Sofia Z. Sheikh</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Webb_C/0/1/0/all/0/1">Claire Webb</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Worden_S/0/1/0/all/0/1">S. Pete Worden</a>

The star EPIC 249706694 (HD 139139) was found to exhibit 28 transit-like
events over an 87 day period during the Kepler mission’s K2 Campaign 15
(Rappaport et al. 2019). These events did not fall into an identifiable pattern
and could not be explained by a multitude of transit scenarios explored by the
authors. We conduct follow-up observations at C-band frequencies with the Green
Bank Telescope as part of the ongoing Breakthrough Listen search for
technosignatures. We search for narrow band signals above a signal-to-noise
threshold of 10 and with Doppler drift rates within +-5 Hz/s. We detect no
evidence of technosignatures from EPIC 249706694 and derive an upper limit for
the EIRP (Equivalent Isotropic Radiated Power) of putative transmissions to be
10 TW.

The star EPIC 249706694 (HD 139139) was found to exhibit 28 transit-like
events over an 87 day period during the Kepler mission’s K2 Campaign 15
(Rappaport et al. 2019). These events did not fall into an identifiable pattern
and could not be explained by a multitude of transit scenarios explored by the
authors. We conduct follow-up observations at C-band frequencies with the Green
Bank Telescope as part of the ongoing Breakthrough Listen search for
technosignatures. We search for narrow band signals above a signal-to-noise
threshold of 10 and with Doppler drift rates within +-5 Hz/s. We detect no
evidence of technosignatures from EPIC 249706694 and derive an upper limit for
the EIRP (Equivalent Isotropic Radiated Power) of putative transmissions to be
10 TW.

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