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Astrophysics > High Energy Astrophysical Phenomena

arXiv:2108.05463 (astro-ph)
[Submitted on 11 Aug 2021 (v1), last revised 13 Aug 2021 (this version, v2)]

Title:VERITAS follow-up observation of the blazar TXS 0506+056

Authors:Weidong Jin (for the VERITAS Collaboration), RileyAnne Sharpe
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Abstract:The gamma-ray blazar TXS 0506+056 was found with an enhanced gamma-ray emission state in spatial and temporal coincidence with the IceCube high energy neutrino event IC170922A. This is the most significant association by far between a high-energy neutrino event and a blazar in a flaring state. Studying the time evolution and spectral behavior of the blazar emission may help in identifying the sources of the diffuse neutrino flux observed by IceCube and the origin of energetic cosmic rays. TXS 0506+056 was detected by the VERITAS gamma-ray observatory with a significance of 5.8 standard deviations above 110 GeV in a 35 hour data set collected between September 23, 2017 and February 6, 2018. Here we will present results from recent VERITAS observations and an associated multiwavelength campaign, collected between October 10, 2018 to March 1, 2021. A relatively quiet very high energy gamma-ray emission state was observed during this time period, and flux upper limits are used to constrain the potential variability of this blazar.
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE)
Cite as: arXiv:2108.05463 [astro-ph.HE]
  (or arXiv:2108.05463v2 [astro-ph.HE] for this version)
  https://doi.org/10.48550/arXiv.2108.05463
Related DOI: https://doi.org/10.22323/1.395.0945

Submission history

From: Weidong Jin [view email]
[v1] Wed, 11 Aug 2021 22:25:38 UTC (6,454 KB)
[v2] Fri, 13 Aug 2021 17:53:34 UTC (3,231 KB)
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