Speaker
Description
The origin of IceCube astrophysical neutrinos is an important question in astrophysics and neutrino science, and the real-time follow-up of neutrino events in the very-high-energy (VHE, E > 100 GeV) gamma-ray band is a promising way to locate neutrino sources. In 2017, evidence was presented that a flaring gamma-ray blazar, TXS 0506+056, was in spatial and temporal coincidence with the high-energy neutrino IceCube-170922A detected by IceCube. As a part of an active gamma-ray follow-up observation program of IceCube neutrino alerts, VERITAS performed observations of TXS 0506+056 in the VHE gamma-ray band and has continued this program in the following years. In a similar way, the importance of searching for gamma-ray counterparts is well demonstrated by the first detection of gravitational waves from a neutron star merger by LIGO/Virgo in 2017, which was greatly benefited from the concurrent detection of a gamma-ray burst. Searching for VHE gamma-ray counterparts will be one of the major goals of multimessenger astronomy for the near future. This presentation will describe the IceCube neutrino and gravitational-wave events follow-up program by VERITAS. We will present recent results of searching for VHE gamma-ray counterparts associated with neutrino and gravitational wave events. A subset of events will be presented with multiwavelength data as highlights.
| Collaboration name | VERITAS (Very Energetic Radiation Imaging Telescope Array System) |
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