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@ARTICLE{Acharyya:620263,
author = {Acharyya, A. and Adams, C. B. and Archer, A. and Bangale,
P. and Bartkoske, J. T. and Batista, P. and Benbow, W. and
Brill, A. and Caldwell, J. P. and Carini, M. and
Christiansen, J. L. and Chromey, A. J. and Errando, M. and
Falcone, A. and Feng, Q. and Finley, J. P. and Foote, J. 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 Humensky, T. B. and Jin, W. and
Johnson, M. N. and Kaaret, P. and Kertzman, M. and
Kherlakian, M. and Kieda, D. and Kleiner, T. K. and Korzoun,
N. and Krennrich, F. and Kumar, S. 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 Rabinowitz, P. L. and
Ragan, K. and Reynolds, P. T. and Ribeiro, D. and Roache, E.
and Ryan, J. L. and Sadeh, I. and Sadun, A. C. and Saha, L.
and Santander, M. and Sembroski, G. H. and Shahinyan, K. and
Shang, R. and Splettstoesser, M. and Tak, D. and Talluri, A.
K. and Tucci, J. V. and Williams, D. A. and Wong, S. L. and
Jorstad, S. G. and Lico, R. and Lusen, P. and Marscher, A.
P.},
collaboration = {{VERITAS Collaboration}},
title = {{A} {M}ultiwavelength {S}tudy to {D}ecipher the 2017
{F}lare of the {B}lazar {OJ} 287},
reportid = {PUBDB-2025-00097, arXiv:2407.11848},
year = {2024},
note = {21 pages, 7 figures, accepted for publication in The
Astrophysical Journal},
abstract = {In 2017 February, the blazar OJ 287 underwent a period of
intense multiwavelength activity. It reached a new historic
peak in the soft X-ray (0.3–10 keV) band, as measured by
the Swift X-ray Telescope. This event coincides with a
very-high-energy (VHE) γ-ray outburst that led VERITAS to
detect emission above 100 GeV, with a detection significance
of 10σ (from 2016 December 9 to 2017 March 31). The
time-averaged VHE γ-ray spectrum was consistent with a soft
power law (Γ = −3.81 ± 0.26) and an integral flux
corresponding to $∼2.4\%$ that of the Crab Nebula above
the same energy. Contemporaneous data from multiple
instruments across the electromagnetic spectrum reveal a
complex flaring behavior, primarily in the soft X-ray and
VHE bands. To investigate the possible origin of such an
event, our study focuses on three distinct activity states:
before, during, and after the 2017 February peak. The
spectral energy distributions during these periods suggest
the presence of at least two nonthermal emission zones, with
the more compact one responsible for the observed flare.
Broadband modeling results and observations of a new radio
knot in the jet of OJ 287 in 2017 are consistent with a
flare originating from a strong recollimation shock outside
the radio core.},
cin = {$Z_CTA$},
ddc = {520},
cid = {$I:(DE-H253)Z_CTA-20210408$},
pnm = {613 - Matter and Radiation from the Universe (POF4-613)},
pid = {G:(DE-HGF)POF4-613},
experiment = {EXP:(DE-H253)VERITAS-20170101},
typ = {PUB:(DE-HGF)25},
eprint = {2407.11848},
howpublished = {arXiv:2407.11848},
archivePrefix = {arXiv},
SLACcitation = {$\%\%CITATION$ = $arXiv:2407.11848;\%\%$},
doi = {10.3204/PUBDB-2025-00097},
url = {https://bib-pubdb1.desy.de/record/620263},
}