Bibcode
Aleksić, J.; Alvarez, E. A.; Antonelli, L. A.; Antoranz, P.; Ansoldi, S.; Asensio, M.; Backes, M.; Barres de Almeida, U.; Barrio, J. A.; Bastieri, D.; Becerra-González, J.; Bednarek, W.; Berger, K.; Bernardini, E.; Biland, A.; Blanch, O.; Bock, R. K.; Boller, A.; Bonnoli, G.; Borla Tridon, D.; Bretz, T.; Cañellas, A.; Carmona, E.; Carosi, A.; Colin, P.; Colombo, E.; Contreras, J. L.; Cortina, J.; Cossio, L.; Covino, S.; Da Vela, P.; Dazzi, F.; De Angelis, A.; De Caneva, G.; De Cea del Pozo, E.; De Lotto, B.; Delgado-Mendez, C.; Diago-Ortega, A.; Doert, M.; Domínguez, A.; Dominis Prester, D.; Dorner, D.; Doro, M.; Eisenacher, D.; Elsaesser, D.; Ferenc, D.; Fonseca, M. V.; Font, L.; Fruck, C.; García-López, R. J.; Garczarczyk, M.; Garrido Terrats, D.; Gaug, M.; Giavitto, G.; Godinović, N.; González Muñoz, A.; Gozzini, S. R.; Hadasch, D.; Häfner, D.; Herrero, A.; Hildebrand, D.; Hose, J.; Hrupec, D.; Huber, B.; Jankowski, F.; Jogler, T.; Kadenius, V.; Kellermann, H.; Klepser, S.; Krähenbühl, T.; Krause, J.; La Barbera, A.; Lelas, D.; Leonardo, E.; Lewandowska, N.; Lindfors, E.; Lombardi, S.; López, M.; López-Coto, R.; López-Oramas, A.; Lorenz, E.; Makariev, M.; Maneva, G.; Mankuzhiyil, N.; Mannheim, K.; Maraschi, L.; Mariotti, M.; Martínez, M.; Mazin, D.; Meucci, M.; Miranda, J. M.; Mirzoyan, R.; Moldón, J.; Moralejo, A.; Munar-Adrover, P.; Niedzwiecki, A.; Nieto, D.; Nilsson, K.; Nowak, N.; Orito, R. et al.
Bibliographical reference
Astronomy and Astrophysics, Volume 544, id.A142
Advertised on:
8
2012
Journal
Citations
59
Refereed citations
51
Description
Context. We present the discovery of very high energy (VHE, E > 100
GeV) γ-ray emission from the BL Lac object 1ES 1215+303 by the
MAGIC telescopes and simultaneous multi-wavelength data in a broad
energy range from radio to γ-rays. Aims: We study the VHE
γ-ray emission from 1ES 1215+303 and its relation to the emissions
in other wavelengths. Methods: Triggered by an optical outburst,
MAGIC observed the source in 2011 January - February for 20.3 h. The
target was monitored in the optical R-band by the KVA telescope that
also performed optical polarization measurements. We triggered target of
opportunity observations with the Swift satellite and obtained
simultaneous and quasi-simultaneous data from the Fermi Large Area
Telescope and from the Metsähovi radio telescope. We also present
the analysis of older MAGIC data taken in 2010. Results: The
MAGIC observations of 1ES 1215+303 carried out in 2011 January -
February resulted in the first detection of the source at VHE with a
statistical significance of 9.4σ. Simultaneously, the source was
observed in a high optical and X-ray state. In 2010 the source was
observed in a lower state in optical, X-ray, and VHE, while the GeV
γ-ray flux and the radio flux were comparable in 2010 and 2011.
The spectral energy distribution obtained with the 2011 data can be
modeled with a simple one zone SSC model, but it requires extreme values
for the Doppler factor or the electron energy distribution.
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