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TeV Gamma-Ray Observations of the Binary Neutron Star Merger GW170817 with HESS
North West Univ, South Africa.
Univ Hamburg, Germany.
Max Planck Inst Kernphys, Germany;Dublin Inst Adv Studies, Ireland;Natl Acad Sci Republ Armenia, Armenia.
Max Planck Inst Kernphys, Germany.
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2017 (English)In: Astrophysical Journal Letters, ISSN 2041-8205, E-ISSN 2041-8213, Vol. 850, no 2, article id L22Article in journal (Refereed) Published
Abstract [en]

We search for high-energy gamma-ray emission from the binary neutron star merger GW170817 with the H.E.S.S. Imaging Air Cherenkov Telescopes. The observations presented here have been obtained starting only 5.3 hr after GW170817. The H.E.S.S. target selection identified regions of high probability to find a counterpart of the gravitational-wave event. The first of these regions contained the counterpart SSS17a that has been identified in the optical range several hours after our observations. We can therefore present the first data obtained by a ground-based pointing instrument on this object. A subsequent monitoring campaign with the H.E.S.S. telescopes extended over several days, covering timescales from 0.22 to 5.2 days and energy ranges between 270 GeV to 8.55 TeV. No significant gamma-ray emission has been found. The derived upper limits on the very-high-energy gamma-ray flux for the first time constrain non-thermal, high-energy emission following the merger of a confirmed binary neutron star system.

Place, publisher, year, edition, pages
Institute of Physics Publishing (IOPP), 2017. Vol. 850, no 2, article id L22
Keywords [en]
gamma-ray burst: individual (GRB 170817A), gamma rays: general, gravitational waves
National Category
Astronomy, Astrophysics and Cosmology
Research subject
Physics, Astroparticle Physics
Identifiers
URN: urn:nbn:se:lnu:diva-69692DOI: 10.3847/2041-8213/aa97d2ISI: 000416034400002OAI: oai:DiVA.org:lnu-69692DiVA, id: diva2:1172722
Available from: 2018-01-10 Created: 2018-01-10 Last updated: 2018-01-10Bibliographically approved

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Becherini, YvonneFarnier, ChristianProkhorov, DmitryPunch, Michael

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Becherini, YvonneFarnier, ChristianProkhorov, DmitryPunch, Michael
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Astrophysical Journal Letters
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