H.E.S.S. follow-up of IceCube-160731A

ATel #9301; Mathieu de Naurois for the H. E.S. S. collaboration
on 2 Aug 2016; 15:57 UT
Credential Certification: Fabian Schüssler (fabian.schussler@cea.fr)

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The H.E.S.S. instrument was used to carry out follow-up observations of a high energy neutrino detected by IceCube on the 31st July 2016 at 01:55:04 UTC. The IceCube best fit position is Ra = 214.54, Dec = -0.33 with a radius of 0.75 deg at 90% confidence. The event was classified as Extremely-High-Energy (EHE) event suggesting a neutrino energy of more than 1 PeV. H.E.S.S. observed the region in two consecutive nights (2016-07-31/08-01 and 2016-08-01/02) for roughly 1 hour each. The observations were taken with the full array consisting of one 28m diameter telescope and four 12m diameter telescopes. A preliminary on-site calibration and analysis searching for a point-like gamma-ray source from within the 90% uncertainty region of IceCube160731 revealed no significant emission. H.E.S.S. is an array of five imaging atmospheric Cherenkov telescopes for the detection of very-high-energy gamma-ray sources and is located in the Khomas Highlands in Namibia. It was constructed and is operated by researchers from Armenia, Australia, Austria, the Czech Republic, France, Germany, Ireland, Netherlands, Japan, Poland, South Africa, Sweden, UK, and the host country, Namibia.