IceCube Search for Neutrinos from 1ES 1959+650: Completing the Picture

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. Thissuggests 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 ontwo 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