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- Aleksic, J. (author)
PG 1553+113 : FIVE YEARS OF OBSERVATIONS WITH MAGIC
- Article/chapterEnglish2012
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- 2012
- printrdacarrier
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- LIBRIS-ID:oai:DiVA.org:su-76153
- https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-76153URI
- https://doi.org/10.1088/0004-637X/748/1/46DOI
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- Language:English
- Summary in:English
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- SwePubSwePub
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- 158
- We present the results of five years (2005-2009) of MAGIC observations of the BL Lac object PG 1553+113 at very high energies (VHEs; E > 100 GeV). Power-law fits of the individual years are compatible with a steady mean photon index Gamma = 4.27 +/- 0.14. In the last three years of data, the flux level above 150 GeV shows a clear variability (probability of constant flux < 0.001%). The flux variations are modest, lying in the range from 4% to 11% of the Crab Nebula flux. Simultaneous optical data also show only modest variability that seems to be correlated with VHE gamma-ray variability. We also performed a temporal analysis of (all available) simultaneous Fermi/Large Area Telescope data of PG 1553+113 above 1 GeV, which reveals hints of variability in the 2008-2009 sample. Finally, we present a combination of the mean spectrum measured at VHEs with archival data available for other wavelengths. The mean spectral energy distribution can be modeled with a one-zone synchrotron self-Compton model, which gives the main physical parameters governing the VHE emission in the blazar jet.
Subject headings and genre
- NATURVETENSKAP Fysik Astronomi, astrofysik och kosmologi hsv//swe
- NATURAL SCIENCES Physical Sciences Astronomy, Astrophysics and Cosmology hsv//eng
- BL Lacertae objects: individual (PG 1553+113)
- gamma rays: galaxies
- radiation mechanisms: non-thermal
Added entries (persons, corporate bodies, meetings, titles ...)
- Alvarez, E. A. (author)
- Antonelli, L. A. (author)
- Antoranz, P. (author)
- Asensio, M. (author)
- Backes, M. (author)
- Barrio, J. A. (author)
- Bastieri, D. (author)
- Becerra Gonzalez, J. (author)
- Bednarek, W. (author)
- Berdyugin, A. (author)
- Berger, K. (author)
- Bernardini, E. (author)
- Biland, A. (author)
- Blanch, O. (author)
- Bock, R. K. (author)
- Boller, A. (author)
- Bonnoli, G. (author)
- Tridon, D. Borla (author)
- Braun, I. (author)
- Bretz, T. (author)
- Canellas, A. (author)
- Carmona, E. (author)
- Carosi, A. (author)
- Colin, P. (author)
- Colombo, E. (author)
- Contreras, J. L. (author)
- Cortina, J. (author)
- Cossio, L. (author)
- Covino, S. (author)
- Dazzi, F. (author)
- De Angelis, A. (author)
- De Caneva, G. (author)
- De Cea del Pozo, E. (author)
- De Lotto, B. (author)
- Delgado Mendez, C. (author)
- Diago Ortega, A. (author)
- Doert, M. (author)
- Dominguez, A. (author)
- Prester, D. Dominis (author)
- Dorner, D. (author)
- Doro, M. (author)
- Elsaesser, D. (author)
- Ferenc, D. (author)
- Fonseca, M. V. (author)
- Font, L. (author)
- Fruck, C. (author)
- Garcia Lopez, R. J. (author)
- Garczarczyk, M. (author)
- Garrido, D. (author)
- Giavitto, G. (author)
- Godinovic, N. (author)
- Hadasch, D. (author)
- Haefner, D. (author)
- Herrero, A. (author)
- Hildebrand, D. (author)
- Ohne-Moench, D. H. (author)
- Hose, J. (author)
- Hrupec, D. (author)
- Huber, B. (author)
- Jogler, T. (author)
- Kellermann, H. (author)
- Klepser, S. (author)
- Kraehenbuehl, T. (author)
- Krause, J. (author)
- La Barbera, A. (author)
- Lelas, D. (author)
- Leonardo, E. (author)
- Lindfors, E. (author)
- Lombardi, S. (author)
- Lopez, M. (author)
- Lopez-Oramas, A. (author)
- Lorenz, E. (author)
- Makariev, M. (author)
- Maneva, G. (author)
- Mankuzhiyil, N. (author)
- Mannheim, K. (author)
- Maraschi, L. (author)
- Mariotti, M. (author)
- Martinez, M. (author)
- Mazin, D. (author)
- Meucci, M. (author)
- Miranda, J. M. (author)
- Mirzoyan, R. (author)
- Miyamoto, H. (author)
- Moldon, J. (author)
- Moralejo, A. (author)
- Munar-Adrover, P. (author)
- Nieto, D. (author)
- Nilsson, K. (author)
- Orito, R. (author)
- Oya, I. (author)
- Paneque, D. (author)
- Paoletti, R. (author)
- Pardo, S. (author)
- Paredes, J. M. (author)
- Partini, S. (author)
- Pasanen, M. (author)
- Pauss, F. (author)
- Perez-Torres, M. A. (author)
- Persic, M. (author)
- Peruzzo, L. (author)
- Pilia, M. (author)
- Pochon, J. (author)
- Prada, F. (author)
- Moroni, P. G. Prada (author)
- Prandini, E. (author)
- Puljak, I. (author)
- Reichardt, I. (author)
- Reinthal, R. (author)
- Rhode, W. (author)
- Ribo, M. (author)
- Rico, J. (author)
- Ruegamer, S. (author)
- Saggion, A. (author)
- Saito, K. (author)
- Saito, T. Y. (author)
- Salvati, M. (author)
- Satalecka, K. (author)
- Scalzotto, V. (author)
- Scapin, V. (author)
- Schultz, C. (author)
- Schweizer, T. (author)
- Shayduk, M. (author)
- Shore, S. N. (author)
- Sillanpaa, A. (author)
- Sitarek, J. (author)
- Sobczynska, D. (author)
- Spanier, F. (author)
- Spiro, S. (author)
- Stamatescu, V. (author)
- Stamerra, A. (author)
- Steinke, B. (author)
- Storz, J. (author)
- Strah, N. (author)
- Suric, T. (author)
- Takalo, L. (author)
- Takami, H. (author)
- Tavecchio, F. (author)
- Temnikov, P. (author)
- Terzic, T. (author)
- Tescaro, D. (author)
- Teshima, M. (author)
- Tibolla, O. (author)
- Torres, D. F. (author)
- Treves, A. (author)
- Uellenbeck, M. (author)
- Vankov, H. (author)
- Vogler, P. (author)
- Wagner, R. M. (author)
- Weitzel, Q. (author)
- Zabalza, V. (author)
- Zandanel, F. (author)
- Zanin, R. (author)
- Buson, S. (author)
- Horan, D. (author)
- Larsson, StefanStockholms universitet,Institutionen för astronomi(Swepub:su)slars (author)
- D'Ammando, F. (author)
- Stockholms universitetInstitutionen för astronomi (creator_code:org_t)
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- In:Astrophysical Journal748:1, s. 46-0004-637X1538-4357
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- Aleksic, J.
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