PG 1553+113：MAGIC 五年观测结果
宇宙学与河外天体物理
2015-05-27 v4 高能天体物理现象
摘要
我们展示了 MAGIC 对 BL Lac 天体 PG 1553+113 在甚高能（VHE，E > 100 GeV）波段五年（2005-2009）的观测结果。各年份的幂律拟合与稳定的平均光子指数 一致。在最后三年的数据中，150 GeV 以上的流量水平显示出明显的变异性（恒定流量概率 < 0.001%）。流量变化幅度较小，在蟹状星云流量的 4% 到 11% 之间。同时期的光学数据也仅显示出微弱的变异性，且似乎与甚高能伽马射线变异性相关。我们还对 PG 1553+113 所有可用的同时期 Fermi/LAT 1 GeV 以上数据进行了时间分析，结果提示 2008-2009 年样本存在变异性迹象。最后，我们将甚高能波段测得的平均能谱与其他波段的存档数据进行了组合。平均能谱分布可以用单区同步自康普顿（SSC）模型拟合，该模型给出了控制耀变体喷流中甚高能发射的主要物理参数。
引用
@article{arxiv.1101.2764,
title = {PG 1553+113: five years of observations with MAGIC},
author = {MAGIC Collaboration and J. Aleksić and E. A. Alvarez and L. A. Antonelli and P. Antoranz and M. Asensio and M. Backes and J. A. Barrio and D. Bastieri and J. Becerra González and W. Bednarek and A. Berdyugin and K. Berger and E. Bernardini and A. Biland and O. Blanch and R. K. Bock and A. Boller and G. Bonnoli and D. Borla Tridon and I. Braun and T. Bretz and A. Cañellas and E. Carmona and A. Carosi and P. Colin and E. Colombo and J. L. Contreras and J. Cortina and L. Cossio and S. Covino and F. Dazzi and A. De Angelis and G. De Caneva and E. De Cea del Pozo and B. De Lotto and C. Delgado Mendez and A. Diago Ortega and M. Doert and A. Domínguez and D. Dominis Prester and D. Dorner and M. Doro and D. Elsaesser and D. Ferenc and M. V. Fonseca and L. Font and C. Fruck and R. J. García López and M. Garczarczyk and D. Garrido and G. Giavitto and N. Godinović and D. Hadasch and D. Häfner and A. Herrero and D. Hildebrand and D. Höhne-Mönch and J. Hose and D. Hrupec and B. Huber and T. Jogler and H. Kellermann and S. Klepser and T. Krähenbühl and J. Krause and A. La Barbera and D. Lelas and E. Leonardo and E. Lindfors and S. Lombardi and M. López and A. López-Oramas and E. Lorenz and M. Makariev and G. Maneva and N. Mankuzhiyil and K. Mannheim and L. Maraschi and M. Mariotti and M. Martínez and D. Mazin and M. Meucci and J. M. Miranda and R. Mirzoyan and H. Miyamoto and J. Moldón and A. Moralejo and P. Munar-Adrover and D. Nieto and K. Nilsson and R. Orito and I. Oya and D. Paneque and R. Paoletti and S. Pardo and J. M. Paredes and S. Partini and M. Pasanen and F. Pauss and M. A. Perez-Torres and M. Persic and L. Peruzzo and M. Pilia and J. Pochon and F. Prada and P. G. Prada Moroni and E. Prandini and I. Puljak and I. Reichardt and R. Reinthal and W. Rhode and M. Ribó and J. Rico and S. Rügamer and A. Saggion and K. Saito and T. Y. Saito and M. Salvati and K. Satalecka and V. Scalzotto and V. Scapin and C. Schultz and T. Schweizer and M. Shayduk and S. N. Shore and A. Sillanpää and J. Sitarek and D. Sobczynska and F. Spanier and S. Spiro and V. Stamatescu and A. Stamerra and B. Steinke and J. Storz and N. Strah and T. Surić and L. Takalo and H. Takami and F. Tavecchio and P. Temnikov and T. Terzić and D. Tescaro and M. Teshima and O. Tibolla and D. F. Torres and A. Treves and M. Uellenbeck and H. Vankov and P. Vogler and R. M. Wagner and Q. Weitzel and V. Zabalza and F. Zandanel and R. Zanin and S. Buson and D. Horan and S. Larsson and F. D'Ammando},
journal= {arXiv preprint arXiv:1101.2764},
year = {2015}
}
备注
11 pages, 6 figures, accepted for publication in ApJ