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FERMI-LAT OBSERVATIONS OF THE LIGO EVENT GW150914
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
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Number of Authors: 167
2016 (English)In: Astrophysical Journal Letters, ISSN 2041-8205, E-ISSN 2041-8213, Vol. 823, no 1, L2Article in journal (Refereed) Published
Abstract [en]

The Fermi Large Area Telescope (LAT) has an instantaneous field of view (FoV) covering similar to 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 similar to 70 minutes of the trigger and thus enabled a comprehensive search for a.-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.

Place, publisher, year, edition, pages
2016. Vol. 823, no 1, L2
Keyword [en]
gamma-ray burst: general, gamma-rays: general, gravitational waves, methods: observational
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-132069DOI: 10.3847/2041-8205/823/1/L2ISI: 000376391700002OAI: oai:DiVA.org:su-132069DiVA: diva2:948545
Available from: 2016-07-12 Created: 2016-07-06 Last updated: 2016-07-12Bibliographically approved

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Anderson, BrandonLarsson, StefanMeyer, ManuelZimmer, Stephan
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Department of PhysicsThe Oskar Klein Centre for Cosmo Particle Physics (OKC)
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