Home > Publications database > VERITAS discovery of very high energy gamma-ray emission from S3 1227+25 and multiwavelength observations > print

001     585373
005     20230721220652.0
024 7 _ |a VERITAS:2023smr
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024 7 _ |a inspire:2656721
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024 7 _ |a arXiv:2305.02860
|2 arXiv
024 7 _ |a 10.3204/PUBDB-2023-03521
|2 datacite_doi
037 _ _ |a PUBDB-2023-03521
041 _ _ |a English
088 _ _ |a arXiv:2305.02860
|2 arXiv
100 1 _ |a Acharyya, A.
|0 P:(DE-H253)PIP1085764
|b 0
|e Corresponding author
245 _ _ |a VERITAS discovery of very high energy gamma-ray emission from S3 1227+25 and multiwavelength observations
260 _ _ |c 2023
336 7 _ |a Preprint
|b preprint
|m preprint
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|2 PUB:(DE-HGF)
336 7 _ |a WORKING_PAPER
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336 7 _ |a Electronic Article
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336 7 _ |a preprint
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336 7 _ |a ARTICLE
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336 7 _ |a Output Types/Working Paper
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500 _ _ |a 18 pages, 6 figures. Accepted for publication in the Astrophysical Journal (ApJ)
520 _ _ |a We report the detection of very high energy gamma-ray emission from the blazar S3 1227+25 (VER J1230+253) with the Very Energetic Radiation Imaging Telescope Array System (VERITAS). VERITAS observations of the source were triggered by the detection of a hard-spectrum GeV flare on May 15, 2015 with the Fermi-Large Area Telescope (LAT). A combined five-hour VERITAS exposure on May 16th and May 18th resulted in a strong 13$\sigma$ detection with a differential photon spectral index, $\Gamma$ = 3.8 $\pm$ 0.4, and a flux level at 9% of the Crab Nebula above 120 GeV. This also triggered target of opportunity observations with Swift, optical photometry, polarimetry and radio measurements, also presented in this work, in addition to the VERITAS and Fermi-LAT data. A temporal analysis of the gamma-ray flux during this period finds evidence of a shortest variability timescale of $\tau_{obs}$ = 6.2 $\pm$ 0.9 hours, indicating emission from compact regions within the jet, and the combined gamma-ray spectrum shows no strong evidence of a spectral cut-off. An investigation into correlations between the multiwavelength observations found evidence of optical and gamma-ray correlations, suggesting a single-zone model of emission. Finally, the multiwavelength spectral energy distribution is well described by a simple one-zone leptonic synchrotron self-Compton radiation model.
536 _ _ |a 613 - Matter and Radiation from the Universe (POF4-613)
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588 _ _ |a Dataset connected to INSPIRE
650 _ 7 |a gamma ray: VHE
|2 INSPIRE
650 _ 7 |a gamma ray: emission
|2 INSPIRE
650 _ 7 |a gamma ray: flux
|2 INSPIRE
650 _ 7 |a emission: model
|2 INSPIRE
650 _ 7 |a detector: imaging
|2 INSPIRE
650 _ 7 |a polarization: monitoring
|2 INSPIRE
650 _ 7 |a VERITAS
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650 _ 7 |a GeV
|2 INSPIRE
650 _ 7 |a optical
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650 _ 7 |a correlation
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650 _ 7 |a spectral
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650 _ 7 |a variability
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650 _ 7 |a power spectrum
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650 _ 7 |a blazar
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650 _ 7 |a photon
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650 _ 7 |a spectral energy distribution
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650 _ 7 |a GLAST
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650 _ 7 |a synchrotron
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693 _ _ |0 EXP:(DE-H253)CTA-20150101
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693 _ _ |0 EXP:(DE-H253)VERITAS-20170101
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|e Very Energetic Radiation Imaging Telescope Array System
|x 1
700 1 _ |a Adams, C. B.
|b 1
700 1 _ |a Archer, A.
|b 2
700 1 _ |a Bangale, P.
|0 0000-0002-3886-3739
|b 3
700 1 _ |a Benbow, W.
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700 1 _ |a Brill, A.
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700 1 _ |a Christiansen, J. L.
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700 1 _ |a Chromey, A. J.
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700 1 _ |a Errando, M.
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700 1 _ |a Falcone, A.
|0 0000-0002-5068-7344
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700 1 _ |a Feng, Q.
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700 1 _ |a Finley, J. P.
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700 1 _ |a Foote, G. M.
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700 1 _ |a Fortson, L.
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700 1 _ |a Furniss, A.
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700 1 _ |a Gallagher, G.
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700 1 _ |a Hanlon, W.
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700 1 _ |a Hanna, D.
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700 1 _ |a Hervet, O.
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700 1 _ |a Hinrichs, C. E.
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700 1 _ |a Hoang, J.
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700 1 _ |a Holder, J.
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700 1 _ |a Jin, W.
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700 1 _ |a Johnson, M. N.
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700 1 _ |a Kaaret, P.
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700 1 _ |a Kertzman, M.
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700 1 _ |a Kieda, D.
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700 1 _ |a Kleiner, T. K.
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700 1 _ |a Korzoun, N.
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700 1 _ |a Krennrich, F.
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700 1 _ |a Lang, M. J.
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700 1 _ |a Lundy, M.
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700 1 _ |a Maier, G.
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700 1 _ |a McGrath, C. E.
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700 1 _ |a Millard, M. J.
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700 1 _ |a Millis, J.
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700 1 _ |a Mooney, C. L.
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700 1 _ |a Moriarty, P.
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700 1 _ |a Mukherjee, R.
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700 1 _ |a O'Brien, S.
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700 1 _ |a Ong, R. A.
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700 1 _ |a Pohl, M.
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700 1 _ |a Pueschel, E.
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700 1 _ |a Quinn, J.
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700 1 _ |a Ragan, K.
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700 1 _ |a Reynolds, P. T.
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700 1 _ |a Ribeiro, D.
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700 1 _ |a Roache, E.
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700 1 _ |a Sadeh, I.
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700 1 _ |a Sadun, A. C.
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700 1 _ |a Saha, L.
|b 50
700 1 _ |a Santander, M.
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700 1 _ |a Sembroski, G. H.
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700 1 _ |a Shang, R.
|b 53
700 1 _ |a Splettstoesser, M.
|0 0000-0003-3407-9936
|b 54
700 1 _ |a Talluri, A. Kaushik
|b 55
700 1 _ |a Tucci, J. V.
|b 56
700 1 _ |a Vassiliev, V. V.
|b 57
700 1 _ |a Williams, D. A.
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700 1 _ |a Wong, S. L.
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700 1 _ |a Hovatta, Talvikki
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700 1 _ |a Jorstad, Svetlana G.
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700 1 _ |a Kiehlmann, Sebastian
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700 1 _ |a Lähteenmäki, Anne
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700 1 _ |a Liodakis, Ioannis
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700 1 _ |a Marscher, Alan P.
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700 1 _ |a Max-Moerbeck, Walter
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700 1 _ |a Readhead, Anthony C. S.
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700 1 _ |a Reeves, Rodrigo
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700 1 _ |a Smith, Paul S.
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700 1 _ |a Tornikoski, Merja
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700 1 _ |a VERITAS Collaboration
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856 4 _ |y OpenAccess
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913 1 _ |a DE-HGF
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