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A 1.1-1.9 GHz SETI Survey of the Kepler Field. I. A Search for Narrow-band Emission from Select Targets

Siemion, Andrew P. V. and Demorest, Paul and Korpela, Eric and Maddalena, Ron J. and Werthimer, Dan and Cobb, Jeff and Howard, Andrew W. and Langston, Glen and Lebofsky, Matt and Marcy, Geoffrey W. and Tarter, Jill (2013) A 1.1-1.9 GHz SETI Survey of the Kepler Field. I. A Search for Narrow-band Emission from Select Targets. Astrophysical Journal, 767 (1). Art. No. 94. ISSN 0004-637X. doi:10.1088/0004-637X/767/1/94.

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We present a targeted search for narrow-band (<5 Hz) drifting sinusoidal radio emission from 86 stars in the Kepler field hosting confirmed or candidate exoplanets. Radio emission less than 5 Hz in spectral extent is currently known to only arise from artificial sources. The stars searched were chosen based on the properties of their putative exoplanets, including stars hosting candidates with 380 K > T_(eq) > 230 K, stars with five or more detected candidates or stars with a super-Earth (R_p < 3 R⊕) in a >50 day orbit. Baseband voltage data across the entire band between 1.1 and 1.9 GHz were recorded at the Robert C. Byrd Green Bank Telescope between 2011 February and April and subsequently searched offline. No signals of extraterrestrial origin were found. We estimate that fewer than ~1% of transiting exoplanet systems host technological civilizations that are radio loud in narrow-band emission between 1 and 2 GHz at an equivalent isotropically radiated power (EIRP) of ~1.5 × 10^(21) erg s^(–1), approximately eight times the peak EIRP of the Arecibo Planetary Radar, and we limit the number of 1-2 GHz narrow-band-radio-loud Kardashev type II civilizations in the Milky Way to be < 10^(-6) M⊙^(-1). Here we describe our observations, data reduction procedures and results.

Item Type:Article
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URLURL TypeDescription Paper
Howard, Andrew W.0000-0001-8638-0320
Marcy, Geoffrey W.0000-0002-2909-0113
Additional Information:© 2013 The American Astronomical Society. Received 2012 December 6; accepted 2013 February 3; published 2013 March 28. We thank John Ford and Scott Ransom for technical assistance during our observations and Gerry Harp for comments on an early draft of this manuscript. The work presented here was partially funded by NASA Exobiology Grant NNX09AN69G and donations from the Friends of Berkeley SETI and the Friends of SETI@home. We also acknowledge the financial and intellectual contributions of the students, faculty and sponsors of the Berkeley Wireless Research Center. This research used resources of the National Energy Research Scientific Computing Center, which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH1123. A.P.V.S. gratefully acknowledges receipt of student observing support from the National Radio Astronomy Observatory. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.
Funding AgencyGrant Number
Friends of Berkeley SETIUNSPECIFIED
Berkeley Wireless Research CenterUNSPECIFIED
Department of Energy (DOE)DE-AC02-05CH1123
National Radio Astronomy ObservatoryUNSPECIFIED
Subject Keywords:astrobiology – extraterrestrial intelligence – planets and satellites: detection – planets and satellites: general – surveys
Issue or Number:1
Record Number:CaltechAUTHORS:20170627-134051275
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Official Citation:Andrew P. V. Siemion et al 2013 ApJ 767 94
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:78615
Deposited By: Tony Diaz
Deposited On:27 Jun 2017 23:32
Last Modified:15 Nov 2021 17:41

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