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Veritas observations of the bl lac object txs 0506+056

Abeysekara, A. U.
; 
Archer, A.
; 
Benbow, W.
; 
Bird, R.
; 
Brill, A.
; 
Brose, R.
; 
Buckley, J. H.
; 
Christiansen, J. L.
; 
Chromey, A. J.
; 
Daniel, M. K.
... show 10 more
Identifiers
http://hdl.handle.net/10379/10076
https://doi.org/10.13025/27953
Repository DOI
10.3847/2041-8213/aad053
Publication Date
2018-07-12
Keywords
astroparticle physics, bl lacertae objects: individual (txs 0506+056, ver j0509+057), gamma rays: galaxies, quasars: general, neutrinos, active galactic nuclei, telescope, radiation, mission, blazar, i.
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Article
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Citation
Abeysekara, A. U. Archer, A.; Benbow, W.; Bird, R.; Brill, A.; Brose, R.; Buckley, J. H.; Christiansen, J. L.; Chromey, A. J.; Daniel, M. K.; Falcone, A.; Feng, Q.; Finley, J. P.; Fortson, L.; Furniss, A.; Gillanders, G. H.; Gueta, O.; Hanna, D.; Hervet, O.; Holder, J.; Hughes, G.; Humensky, T. B.; Johnson, C. A.; Kaaret, P.; Kar, P.; Kelley-Hoskins, N.; Kertzman, M.; Kieda, D.; Krause, M.; Krennrich, F.; Lang, M. J.; Moriarty, P.; Mukherjee, R.; O’Brien, S.; Ong, R. A.; Otte, A. N.; Park, N.; Petrashyk, A.; Pohl, M.; Pueschel, E.; Quinn, J.; Ragan, K.; Reynolds, P. T.; Richards, G. T.; Roache, E.; Rulten, C.; Sadeh, I.; Santander, M.; Scott, S. S.; Sembroski, G. H.; Shahinyan, K.; Tyler, J.; Wakely, S. P.; Weinstein, A.; Wells, R. M.; Wilcox, P.; Wilhelm, A.; Williams, D. A.; Williamson, T. J; Zitzer, B.; Kaur, A.; , (2018). Veritas observations of the bl lac object txs 0506+056. The Astrophysical Journal 861 (2),
Abstract
On 2017 September 22, the IceCube Neutrino Observatory reported the detection of the high-energy neutrino event IC 170922A, of potential astrophysical origin. It was soon determined that the neutrino direction was consistent with the location of the gamma-ray blazar TXS 0506+056. (3FGL J0509.4+ 0541), which was in an elevated gamma-ray emission state as measured by the Fermi satellite. Very Energetic Radiation Imaging Telescope Array System (VERITAS) observations of the neutrino/blazar region started on 2017 September 23 in response to the neutrino alert and continued through 2018 February 6. While no significant very-high-energy (VHE; E > 100 GeV) emission was observed from the blazar by VERITAS in the two-week period immediately following the IceCube alert, TXS 0506+ 056 was detected by VERITAS with a significance of 5.8 standard deviations (sigma) in the full 35 hr data set. The average photon flux of the source during this period was (8.9 +/- 1.6). x. 10(-12) cm(-2) s(-1), or 1.6% of the Crab Nebula flux, above an energy threshold of 110 GeV, with a soft spectral index of 4.8. +/-. 1.3.
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Publisher
American Astronomical Society
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Attribution-NonCommercial-NoDerivs 3.0 Ireland
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Externally hosted open access publications with University of Galway authors (2)