PoS - Proceedings of Science
Volume 301 - 35th International Cosmic Ray Conference (ICRC2017) - Session Neutrino. NU-astrophysical neutrinos
IceCube Search for Neutrinos from 1ES 1959+650: Completing the Picture
T. Kintscher*  on behalf of the IceCube Collaboration  on behalf of the FACT Collaboration  on behalf of the MAGIC collaboration, K. Krings, D. Dorner, W. Bhattacharyya and M. Takahashi
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Pre-published on: August 16, 2017
Published on: August 03, 2018
Abstract
The IceCube neutrino observatory is a 1 km$^3$ detector deployed in the ice at the South Pole. While it has observed an astrophysical flux of neutrinos, individual sources have yet to be identified and the high-peaked BL Lac object 1ES 1959+650 is an intriguing candidate. It exhibited an ``orphan flare'' in 2002: a TeV gamma ray flare without a simultaneous X-ray flare, behavior that is hard to accommodate in leptonic synchrotron self-compton models. This suggests that it is a potential site of hadronic acceleration and thus a prime source candidate for neutrinos.
A recently observed increase in gamma ray activity from 1ES 1959+650 between May and July of 2016 has provided a new opportunity, prompting a dedicated search in IceCube data for neutrinos correlated with the flaring states during this period.
We present results based on two model-independent approaches which look only for an excess of neutrinos from the source, as well as a more targeted search for a direct time correlation between neutrino events observed by IceCube and gamma ray emission observed with the FACT and MAGIC telescopes.
DOI: https://doi.org/10.22323/1.301.0969
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