Bibcode
Aleksić, J.; Antonelli, L. A.; Antoranz, P.; Backes, M.; Barrio, J. A.; Bastieri, D.; Becerra-González, J.; Bednarek, W.; Berdyugin, A.; Berger, K.; Bernardini, E.; Biland, A.; Blanch, O.; Bock, R. K.; Boller, A.; Bonnoli, G.; Bordas, P.; Borla Tridon, D.; Bosch-Ramon, V.; Bose, D.; Braun, I.; Bretz, T.; Camara, M.; Cañellas, A.; Carmona, E.; Carosi, A.; Colin, P.; Colombo, E.; Contreras, J. L.; Cortina, J.; Cossio, L.; Covino, S.; Dazzi, F.; De Angelis, A.; De Cea del Pozo, E.; De Lotto, B.; De Maria, M.; De Sabata, F.; Delgado-Mendez, C.; Diago-Ortega, A.; Doert, M.; Domínguez, A.; Dominis Prester, D.; Dorner, D.; Doro, M.; Elsaesser, D.; Errando, M.; Ferenc, D.; Fonseca, M. V.; Font, L.; García López, R. J.; Garczarczyk, M.; Giavitto, G.; Godinović, N.; Hadasch, D.; Herrero, A.; Hildebrand, D.; Höhne-Mönch, D.; Hose, J.; Hrupec, D.; Jogler, T.; Klepser, S.; Krähenbühl, T.; Kranich, D.; Krause, J.; La Barbera, A.; Leonardo, E.; Lindfors, E.; Lombardi, S.; Longo, F.; López, M.; Lorenz, E.; Majumdar, P.; Makariev, M.; Maneva, G.; Mankuzhiyil, N.; Mannheim, K.; Maraschi, L.; Mariotti, M.; Martínez, M.; Mazin, D.; Meucci, M.; Miranda, J. M.; Mirzoyan, R.; Miyamoto, H.; Moldón, J.; Moralejo, A.; Nieto, D.; Nilsson, K.; Orito, R.; Oya, I.; Paoletti, R.; Paredes, J. M.; Partini, S.; Pasanen, M.; Pauss, F.; Pegna, R. G.; Perez-Torres, M. A.; Persic, M.; Peruzzo, L. et al.
Bibliographical reference
The Astrophysical Journal Letters, Volume 723, Issue 2, pp. L207-L212 (2010).
Advertised on:
11
2010
Citations
96
Refereed citations
67
Description
We report on the detection with the MAGIC telescopes of very high energy
(VHE) γ-rays from IC 310, a head-tail radio galaxy in the Perseus
galaxy cluster, observed during the interval 2008 November to 2010
February. The Fermi satellite has also detected this galaxy. The source
is detected by MAGIC at a high statistical significance of 7.6σ in
20.6 hr of stereo data. The observed spectral energy distribution is
flat with a differential spectral index of -2.00 ± 0.14. The mean
flux above 300 GeV, between 2009 October and 2010 February, (3.1
± 0.5) × 10-12 cm-2 s-1,
corresponds to (2.5 ± 0.4)% of Crab Nebula units. Only an upper
limit, of 1.9% of Crab Nebula units above 300 GeV, was obtained with the
2008 data. This, together with strong hints (>3σ) of flares in
the middle of 2009 October and November, implies that the emission is
variable. The MAGIC results favor a scenario with the VHE emission
originating from the inner jet close to the central engine. More
complicated models than a simple one-zone synchrotron self-Compton (SSC)
scenario, e.g., multi-zone SSC, external Compton, or hadronic, may be
required to explain the very flat spectrum and its extension over more
than three orders of magnitude in energy.
Related projects
Particle Astrophysics
The MAGIC Collaboration is integrated by 20 research institutes and university departments from Armenia, Bulgaria, Finland, Germany, Italy, Poland, Spain, Switzerland and USA. The collaboration comprises two 17m diameter telescopes, located at the Roque de los Muchachos Observatory, designed to measure the Cherenkov radiation associated with
Ramón
García López