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FERMI-LAT observations of the ligo event GW150914

Markus Ackermann Marco Ajello 1 A. Albert 2 B. Anderson 3 M. Arimoto William B. Atwood 4 Magnus Axelsson Luca Baldini Jean Ballet 5 Guido Barbiellini Matthew G. Baring D. Bastieri J. Becerra Gonzalez R. Bellazzini E. Bissaldi R. D. Blandford E. D. Bloom R. Bonino E. Bottacini T. J. Brandt J. Bregeon 6 R. J. Britto 7 P. Bruel 8 R. Buehler T. H. Burnett S. Buson G. A. Caliandro R. A. Cameron R. Caputo M. Caragiulo P. A. Caraveo J. M. Casandjian 9 E. Cavazzuti E. Charles A. Chekhtman J. Chiang G. Chiaro S. Ciprini J. Cohen-Tanugi 6 L. R. Cominsky B. Condon 10 F. Costanza A. Cuoco S. Cutini F. D’ammando D. Dumora 10 F. De Palma R. Desiante S. W. Digel 11 N. Di Lalla 12 M. Di Mauro 13 L. Di Venere A. Domínguez P. S. Drell R. Dubois 14 C. Favuzzi S. J. Fegan 8 E. C. Ferrara 15 A. Franckowiak Y. Fukazawa S. Funk 16 P. Fusco 17 F. Gargano D. Gasparrini N. Gehrels N. Giglietto M. Giomi P. Giommi F. Giordano M. Giroletti 18 T. Glanzman G. Godfrey G. A. Gomez-Vargas J. Granot D. Green I. A. Grenier 19 M.-H. Grondin 10 J. E. Grove Lucas Guillemot 20, 21 S. Guiriec D. Hadasch A. K. Harding 22 E. Hays J. W. Hewitt A. B. Hill D. Horan 8 T. Jogler G. Jóhannesson T. Kamae S. Kensei D. Kocevski M. Kuss 23 G. La Mura 24 S. Larsson 25 L. Latronico M. Lemoine-Goumard 10 J. Li 26 L. Li 27 F. Longo F. Loparco M. N. Lovellette P. Lubrano G. M. Madejski J. Magill S. Maldera A. Manfreda M. Marelli M. Mayer M. N. Mazziotta J. E. Mcenery M. Meyer P. F. Michelson 28 N. Mirabal T. Mizuno A. A. Moiseev M. E. Monzani E. Moretti A. Morselli I. V. Moskalenko S. Murgia M. Negro 29 E. Nuss 6 T. Ohsugi N. Omodei M. Orienti E. Orlando J. F. Ormes D. Paneque J. S. Perkins 30 M. Pesce-Rollins F. Piron 6 G. Pivato T. A. Porter 31 J. L. Racusin S. Rainò R. Rando S. Razzaque A. Reimer O. Reimer T. Reposeur 10 S. Ritz 32, 33 L. S. Rochester R. W. Romani P. M. Saz Parkinson 4 C. Sgrò 34 D. Simone 35 E. J. Siskind D. A. Smith 10 F. Spada G. Spandre P. Spinelli 36 D. J. Suson H. Tajima 37 J. G. Thayer J. B. Thayer D. J. Thompson 38 L. Tibaldo D. F. Torres E. Troja Y. Uchiyama 39 T. M. Venters G. Vianello K. S. Wood 40 M. Wood G. Zaharijas S. Zhu 41 S. Zimmer 42
Abstract : The Fermi Large Area Telescope (LAT) has an instantaneous field of view (FoV) covering $\sim 1/5$ of the sky and it completes a survey of the entire sky in high-energy gamma-rays every 3 hr. It enables searches for transient phenomena over timescales from milliseconds to years. Among these phenomena could be electromagnetic counterparts to gravitational wave (GW) sources. In this paper, we present a detailed study of the LAT observations relevant to Laser Interferometer Gravitational-wave Observatory (LIGO) event GW150914, which is the first direct detection of gravitational waves and has been interpreted as being due to the coalescence of two stellar-mass black holes. The localization region for GW150914 was outside the LAT FoV at the time of the GW signal. However, as part of routine survey observations, the LAT observed the entire LIGO localization region within ~70 minutes of the trigger and thus enabled a comprehensive search for a γ-ray counterpart to GW150914. The study of the LAT data presented here did not find any potential counterparts to GW150914, but it did provide limits on the presence of a transient counterpart above 100 MeV on timescales of hours to days over the entire GW150914 localization region.
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Markus Ackermann, Marco Ajello, A. Albert, B. Anderson, M. Arimoto, et al.. FERMI-LAT observations of the ligo event GW150914. The Astrophysical journal letters, Bristol : IOP Publishing, 2016, 823 (1), 13 p. ⟨10.3847/2041-8205/823/1/L2⟩. ⟨insu-01362128⟩

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