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@ARTICLE{Aleksi:207224,
author = {Aleksić, J. and Antonelli, L. A. and Antoranz, P. and
Babic, A. and Barres de Almeida, U. and Barrio, J. A. and
Becerra González, J. and Bednarek, W. and Berger, K. and
Bernardini, E. and Biland, A. and Blanch, O. and Bock, R. K.
and Boller, A. and Bonnefoy, S. and Bonnoli, G. and Borla
Tridon, D. and Borracci, F. and Bretz, T. and Carmona, E.
and Carosi, A. and Carreto Fidalgo, D. and Colin, P. and
Colombo, E. and Contreras, J. L. and Cortina, J. and Cossio,
L. and Covino, S. and Da Vela, P. and Dazzi, F. and De
Angelis, A. and De Caneva, G. and Delgado Mendez, C. and De
Lotto, B. and Doert, M. and Domínguez, A. and Dominis
Prester, D. and Dorner, D. and Doro, M. and Eisenacher, D.
and Elsaesser, D. and Farina, E. and Ferenc, D. and Fonseca,
M. V. and Font, L. and Fruck, C. and García López, R. J.
and Garczarczyk, M. and Garrido Terrats, D. and Gaug, M. and
Giavitto, G. and Godinović, N. and González Muñoz, A. and
Gozzini, S. R. and Hadamek, A. and Hadasch, D. and Häfner,
D. and Herrero, A. and Hose, J. and Hrupec, D. and Idec, W.
and Kadenius, V. and Knoetig, M. L. and Krähenbühl, T. and
Krause, J. and Kushida, J. and La Barbera, A. and Lelas, D.
and Lewandowska, N. and Lindfors, E. and Lombardi, S. and
López-Coto, R. and López, M. and López-Oramas, A. and
Lorenz, E. and Lozano, I. and Makariev, M. and Mallot, K.
and Maneva, G. and Mankuzhiyil, N. and Mannheim, K. and
Maraschi, L. and Marcote, B. and Mariotti, M. and Martínez,
M. and Masbou, J. and Mazin, D. and Meucci, M. and Miranda,
J. M. and Mirzoyan, R. and Moldón, J. and Moralejo, A. and
Munar-Adrover, P. and Nakajima, D. and Niedzwiecki, A. and
Nilsson, K. and Nowak, N. and Orito, R. and Overkemping, A.
and Paiano, S. and Palatiello, M. and Paneque, D. and
Paoletti, R. and Paredes, J. M. and Partini, S. and Persic,
M. and Prada, F. and Prada Moroni, P. G. and Prandini, E.
and Preziuso, S. and Puljak, I. and Reichardt, I. and
Reinthal, R. and Rhode, W. and Ribó, M. and Rico, J. and
Rügamer, S. and Saggion, A. and Saito, K. and Saito, T. Y.
and Salvati, M. and Satalecka, K. and Scalzotto, V. and
Scapin, V. and Schultz, C. and Schweizer, T. and Shore, S.
N. and Sillanpää, A. and Sitarek, J. and Snidaric, I. and
Sobczynska, D. and Spanier, F. and Spiro, S. and Stamatescu,
V. and Stamerra, A. and Steinke, B. and Storz, J. and Sun,
S. and Surić, T. and Takalo, L. and Takami, H. and
Tavecchio, F. and Temnikov, P. and Terzić, T. and Tescaro,
D. and Teshima, M. and Thaele, J. and Tibolla, O. and
Torres, D. F. and Toyama, T. and Treves, A. and Uellenbeck,
M. and Vogler, P. and Wagner, R. M. and Weitzel, Q. and
Zandanel, F. and Zanin, R. and Dauser, T. and Fortin, P. and
Kadler, M. and Krauß, F. and Wilbert, S. and Wilms, J.},
collaboration = {{MAGIC Collaboration}},
title = {{R}apid and {M}ultiband {V}ariability of the {T}e{V}
{B}right {A}ctive {N}ucleus of the {G}alaxy {IC} 310},
journal = {Astronomy and astrophysics},
volume = {563},
issn = {1432-0746},
address = {Les Ulis},
publisher = {EDP Sciences},
reportid = {PUBDB-2015-01207, arXiv:1305.5147},
pages = {A91},
year = {2014},
note = {OA},
abstract = {Context. The radio galaxy IC 310 has recently been
identified as a γ-ray emitter based on observations at GeV
energies with Fermi-LAT and at very high energies (VHE, E >
100 GeV) with the MAGIC telescopes. Originally classified
as a head-tail radio galaxy, the nature of this object is
subject of controversy since its nucleus shows blazar-like
behavior.Aims. To understand the nature of IC 310 and the
origin of the VHE emission, we studied the spectral and flux
variability of IC 310 from the X-ray band to the VHE
γ-ray regime.Methods. The light curve of IC 310 above
300 GeV has been measured with the MAGIC telescopes from
2009 October to 2010 February. Contemporaneous Fermi-LAT
data (2008−2011) in the 10−500 GeV energy range were
also analyzed. In the X-ray regime, archival observations
from 2003 to 2007 with XMM-Newton, Chandra, and Swift-XRT in
the 0.5−10 keV band were studied.Results. The VHE light
curve reveals several high-amplitude and short-duration
flares. Day-to-day flux variability is clearly present
$(>5\sigma)$. The photon index between 120 GeV and 8 TeV
remains at the value Γ $\thicksim$ 2.0 during both low and
high flux states. The VHE spectral shape does not show
significant variability, whereas the flux at 1 TeV changes
by a factor of $\thicksim$ 7. Fermi-LAT detected only eight
$\gamma-ray$ events in the energy range 10 GeV–500 GeV
in three years of observation. The measured photon index of
Γ = 1.3 $\pm$ 0.5 in the Fermi-LAT range is very hard. The
X-ray measurements show strong variability in both flux and
photon index. The latter varied from 1.76 $\pm$ 0.07 to 2.55
$\pm$ 0.07. Conclusions. The rapid variability measured in
γ-rays and X-rays confirms the blazar-like behavior of
IC 310. The multi-TeV γ-ray emission seems to originate
from scales of less than 80 Schwarzschild radii (for a black
hole mass of 2 × 10$^{8}$ $M_{\odot}$) within the compact
core of its FR I radio jet with orientation angle
10°−38°. The spectral energy distribution resembles that
of an extreme blazar, albeit the luminosity is more than two
orders of magnitude lower.},
cin = {ZEU-EXP/AT},
ddc = {520},
cid = {$I:(DE-H253)ZEU-EXP_AT-20120731$},
pnm = {523 - High-energy gamma ray astronomy (POF2-523)},
pid = {G:(DE-HGF)POF2-523},
experiment = {EXP:(DE-MLZ)NOSPEC-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000333798000091},
eprint = {1305.5147},
howpublished = {arXiv:1305.5147},
archivePrefix = {arXiv},
SLACcitation = {$\%\%CITATION$ = $arXiv:1305.5147;\%\%$},
doi = {10.1051/0004-6361/201321938},
url = {https://bib-pubdb1.desy.de/record/207224},
}