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http://hdl.handle.net/20.500.12386/23187
Title: | Discovery of very high energy γ-ray emission from the blazar 1ES 0033+595 by the MAGIC telescopes | Authors: | Aleksić, J. Ansoldi, S. ANTONELLI, Lucio Angelo Antoranz, P. Babic, A. Bangale, P. Barres de Almeida, U. Barrio, J. A. Becerra González, J. Bednarek, W. Berger, K. Bernardini, E. Biland, A. Blanch, O. Bonnefoy, S. Bonnoli, G. Borracci, F. Bretz, T. Carmona, E. Carosi, A. Carreto Fidalgo, D. Colin, P. Colombo, E. Contreras, J. L. Cortina, J. COVINO, Stefano da Vela, P. Dazzi, F. de Angelis, A. de Caneva, G. de Lotto, B. Delgado Mendez, C. Doert, M. Domínguez, A. Dominis Prester, D. Dorner, D. Doro, M. Einecke, S. Eisenacher, D. Elsaesser, D. Farina, E. Ferenc, D. Fonseca, M. V. Font, L. Frantzen, K. Fruck, C. García López, R. J. Garczarczyk, M. Garrido Terrats, D. Gaug, M. Godinović, N. González Muñoz, A. Gozzini, S. R. Hadasch, D. Hayashida, M. Herrera, J. Herrero, A. Hildebrand, D. Hose, J. Hrupec, D. Idec, W. Kadenius, V. Kellermann, H. Kodani, K. Konno, Y. Krause, J. Kubo, H. Kushida, J. LA BARBERA, ANTONINO Lelas, D. Lewandowska, N. Lindfors, E. Lombardi, S. López, M. López-Coto, R. López-Oramas, A. Lorenz, E. Lozano, I. Makariev, M. Mallot, K. Maneva, G. Mankuzhiyil, N. Mannheim, K. Maraschi, L. Marcote, B. Mariotti, M. Martínez, M. Mazin, D. Menzel, U. Meucci, M. Miranda, J. M. Mirzoyan, R. Moralejo, A. Munar-Adrover, P. Nakajima, D. Niedzwiecki, A. Nilsson, K. Nishijima, K. Noda, K. Nowak, N. Orito, R. Overkemping, A. Paiano, S. Palatiello, M. Paneque, D. Paoletti, R. Paredes, J. M. Paredes-Fortuny, X. Partini, S. PERSIC, Massimo Prada, F. Moroni, P. G. Prada PRANDINI, ELISA Preziuso, S. Puljak, I. Reinthal, R. Rhode, W. Ribó, M. Rico, J. Rodriguez Garcia, J. Rügamer, S. Saggion, A. Saito, T. Saito, K. Satalecka, K. Scalzotto, V. Scapin, V. Schultz, C. Schweizer, T. Shore, S. N. Sillanpää, A. Sitarek, J. Snidaric, I. Sobczynska, D. Spanier, F. Stamatescu, V. STAMERRA, Antonio Steinbring, T. Storz, J. Sun, S. Surić, T. Takalo, L. Takami, H. TAVECCHIO, Fabrizio Temnikov, P. Terzić, T. Tescaro, D. Teshima, M. Thaele, J. Tibolla, O. Torres, D. F. Toyama, T. Treves, A. Uellenbeck, M. Vogler, P. Wagner, R. M. Zandanel, F. Zanin, R. MAGIC Collaboration Tronconi, V. Buson, S. Borghese, A. |
Issue Date: | 2015 | Journal: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Number: | 446 | Issue: | 1 | First Page: | 217 | Abstract: | The number of known very high energy (VHE) blazars is ̃50, which is very small in comparison to the number of blazars detected in other frequencies. This situation is a handicap for population studies of blazars, which emit about half of their luminosity in the γ-ray domain. Moreover, VHE blazars, if distant, allow for the study of the environment that the high-energy γ-rays traverse in their path towards the Earth, like the extragalactic background light (EBL) and the intergalactic magnetic field (IGMF), and hence they have a special interest for the astrophysics community. We present the first VHE detection of 1ES 0033+595 with a statistical significance of 5.5σ. The VHE emission of this object is constant throughout the MAGIC observations (2009 August and October), and can be parametrized with a power law with an integral flux above 150 GeV of (7.1 ± 1.3) × 10<SUP>-12</SUP> photons cm<SUP>-2</SUP> s<SUP>-1</SUP> and a photon index of (3.8 ± 0.7). We model its spectral energy distribution (SED) as the result of inverse Compton scattering of synchrotron photons. For the study of the SED, we used simultaneous optical R-band data from the KVA telescope, archival X-ray data by Swift as well as INTEGRAL, and simultaneous high-energy (HE, 300 MeV-10 GeV) γ-ray data from the Fermi Large Area Telescope (LAT) observatory. Using the empirical approach of Prandini et al. (2010) and the Fermi LAT and MAGIC spectra for this object, we estimate the redshift of this source to be 0.34 ± 0.08 ± 0.05. This is a relevant result because this source is possibly one of the 10 most distant VHE blazars known to date, and with further (simultaneous) observations could play an important role in blazar population studies, as well as future constraints on the EBL and IGMF. | Acknowledgments: | We would like to thank the Instituto de Astrofísica de Canarias for the excellent working conditions at the Observatorio del Roque de los Muchachos in La Palma. The support of the German BMBF and MPG, the Italian INFN, the Swiss National Fund SNF, and the Spanish MICINN is gratefully acknowledged. This work was also supported by the CPAN CSD2007-00042 and MultiDark CSD2009-00064 projects of the Spanish Consolider-Ingenio 2010 programme, by grant DO02-353 of the Bulgarian NSF, by grant 127740 of the Academy of Finland, by the DFG Cluster of Excellence ‘Origin and Structure of the Universe’, by the DFG Collaborative Research Centers SFB823/C4 and SFB876/C3, and by the Polish MNiSzW grant 745/N-HESS-MAGIC/2010/0. The Fermi LAT Collaboration acknowledges generous ongoing support from a number of agencies and institutes that have supported both the development and the operation of the LAT as well as scientific data analysis. These include the National Aeronautics and Space Administration and the Department of Energy in the United States, the Commissariat à l'Energie Atomique and the Centre National de la Recherche Scientifique/Institut National de Physique Nucléaire et de Physique des Particules in France, the Agenzia Spaziale Italiana and the Istituto Nazionale di Fisica Nucleare in Italy, the Ministry of Education, Culture, Sports, Science and Technology (MEXT), High Energy Accelerator Research Organization (KEK) and Japan Aerospace Exploration Agency (JAXA) in Japan, and the K. A. Wallenberg Foundation, the Swedish Research Council and the Swedish National Space Board in Sweden. Additional support for science analysis during the operations phase is gratefully acknowledged from the Istituto Nazionale di Astrofisica in Italy and the Centre National d’Études Spatiales in France. | URI: | http://hdl.handle.net/20.500.12386/23187 | URL: | https://academic.oup.com/mnras/article/446/1/217/1311150 | ISSN: | 0035-8711 | DOI: | 10.1093/mnras/stu2024 | Bibcode ADS: | 2015MNRAS.446..217A | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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