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@ARTICLE{Acharyya:586755,
      author       = {Acharyya, A. and Adams, C. B. and Archer, A. and Bangale,
                      P. and Benbow, W. and Brill, A. and Christiansen, J. L. and
                      Chromey, A. J. and Errando, M. and Falcone, A. and Feng, Q.
                      and Finley, J. P. and Foote, G. M. and Fortson, L. and
                      Furniss, A. and Gallagher, G. and Hanlon, W. and Hanna, D.
                      and Hervet, O. and Hinrichs, C. E. and Hoang, J. and Holder,
                      J. and Jin, W. and Johnson, M. N. and Kaaret, P. and
                      Kertzman, M. and Kieda, D. and Kleiner, T. K. and Korzoun,
                      N. and Krennrich, F. and Lang, M. J. and Lundy, M. and
                      Maier, G. and McGrath, C. E. and Millard, M. J. and Millis,
                      J. and Mooney, C. L. and Moriarty, P. and Mukherjee, R. and
                      O'Brien, S. and Ong, R. A. and Pohl, M. and Pueschel, E. and
                      Quinn, J. and Ragan, K. and Reynolds, P. T. and Ribeiro, D.
                      and Roache, E. and Sadeh, I. and Sadun, A. C. and Saha, L.
                      and Santander, M. and Sembroski, G. H. and Shang, R. and
                      Splettstoesser, M. and Talluri, A. Kaushik and Tucci, J. V.
                      and Vassiliev, V. V. and Williams, D. A. and Wong, S. L. and
                      Hovatta, Talvikki and Jorstad, Svetlana G. and Kiehlmann,
                      Sebastian and Lähteenmäki, Anne and Liodakis, Ioannis and
                      Marscher, Alan P. and Max-Moerbeck, Walter and Readhead,
                      Anthony C. S. and Reeves, Rodrigo and Smith, Paul S. and
                      Tornikoski, Merja},
      collaboration = {{VERITAS Collaboration}},
      title        = {{VERITAS} {D}iscovery of {V}ery {H}igh {E}nergy
                      {G}amma-{R}ay {E}mission from {S}3 1227+25 and
                      {M}ultiwavelength {O}bservations},
      journal      = {The astrophysical journal / 1},
      volume       = {950},
      number       = {2},
      issn         = {0004-637X},
      address      = {London},
      publisher    = {Institute of Physics Publ.},
      reportid     = {PUBDB-2023-03993, arXiv:2305.02860},
      pages        = {152},
      year         = {2023},
      note         = {18 pages, 6 figures. Accepted for publication in the
                      Astrophysical Journal (ApJ)},
      abstract     = {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 2015 May 15
                      with the Fermi-Large Area Telescope (LAT). A combined 5 hr
                      VERITAS exposure on May 16 and 18 resulted in a strong 13σ
                      detection with a differential photon spectral index, Γ =
                      3.8 ± 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 τ$_{obs}$ =
                      6.2 ± 0.9 hr, indicating emission from compact regions
                      within the jet, and the combined gamma-ray spectrum shows no
                      strong evidence of a spectral cutoff. 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.},
      keywords     = {gamma ray: VHE (INSPIRE) / gamma ray: emission (INSPIRE) /
                      gamma ray: flux (INSPIRE) / emission: model (INSPIRE) /
                      detector: imaging (INSPIRE) / polarization: monitoring
                      (INSPIRE) / VERITAS (INSPIRE) / GeV (INSPIRE) / optical
                      (INSPIRE) / correlation (INSPIRE) / spectral (INSPIRE) /
                      variability (INSPIRE) / power spectrum (INSPIRE) / blazar
                      (INSPIRE) / photon (INSPIRE) / spectral energy distribution
                      (INSPIRE) / GLAST (INSPIRE) / synchrotron (INSPIRE)},
      cin          = {$Z_CTA$ / $Z_VER$},
      ddc          = {520},
      cid          = {$I:(DE-H253)Z_CTA-20210408$ / $I:(DE-H253)Z_VER-20210408$},
      pnm          = {613 - Matter and Radiation from the Universe (POF4-613)},
      pid          = {G:(DE-HGF)POF4-613},
      experiment   = {EXP:(DE-H253)CTA-20150101 / EXP:(DE-H253)VERITAS-20170101},
      typ          = {PUB:(DE-HGF)16},
      eprint       = {2305.02860},
      howpublished = {arXiv:2305.02860},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2305.02860;\%\%$},
      UT           = {WOS:001018157400001},
      doi          = {10.3847/1538-4357/acd2d0},
      url          = {https://bib-pubdb1.desy.de/record/586755},
}