甚高能耀变体 MAGIC J2001+439 的首次宽带表征与红移测定
高能天体物理现象
2014-12-10 v1
摘要
我们的目标是表征 2FGL J2001.1+4352 的宽带辐射，该源与未知红移的耀变体 MG4 J200112+4352 相关联。基于其伽马射线光谱特性，它被确定为潜在的甚高能 (VHE; GeV) 伽马射线发射体。该源首先于 2009 年被 MAGIC 观测，随后在 2010 年作为多仪器观测活动的一部分再次被观测。MAGIC 观测获得了 14.8 小时的高质量立体数据。在 2010 年和 2011 年期间，对该天体进行了射电、光学和伽马射线能段的监测。该源命名为 MAGIC J2001+439，在 2010 年 7 月 16 日长达 1.3 小时的观测中，首次被 MAGIC 在 VHE 能段探测到，统计显著性为 6.3 ( GeV)。多仪器观测显示所有能段均存在变异性，其中 X 射线和 VHE 能段的变异性幅度最高。我们还于 2013 年利用北欧光学望远镜组织了深度光学成像观测，以确定该源的红移。我们通过在耀变体低活动期测量其宿主星系，首次确定了该 BL Lac 天体的红移。利用 BL Lac 宿主星系光度局限于相对狭窄范围的观测证据，我们得到 。此外，我们利用 Fermi-LAT 和 MAGIC 的伽马射线光谱提供了独立的红移估计，。使用前一个（更准确的）红移值，我们用一个单区 SSC 模型充分描述了不同活动状态下的宽带辐射，并将几天时间尺度的变异性解释为由电子能量分布的高能分量变化所致。
引用
@article{arxiv.1409.3389,
title = {First broadband characterization and redshift determination of the VHE blazar MAGIC J2001+439},
author = {MAGIC Collaboration and J. Aleksić and S. Ansoldi and L. A. Antonelli and P. Antoranz and A. Babic and P. Bangale and U. Barres de Almeida and J. A. Barrio and J. Becerra González and W. Bednarek and E. Bernardini and A. Biland and O. Blanch and S. Bonnefoy and G. Bonnoli and F. Borracci and T. Bretz and E. Carmona and A. Carosi and D. Carreto Fidalgo and P. Colin and E. Colombo and J. L. Contreras and J. Cortina and S. Covino and P. Da Vela and F. Dazzi and A. De Angelis and G. De Caneva and B. De Lotto and C. Delgado Mendez and M. Doert and A. Domínguez and D. Dominis Prester and D. Dorner and M. Doro and S. Einecke and D. Eisenacher and D. Elsaesser and E. Farina and D. Ferenc and M. V. Fonseca and L. Font and K. Frantzen and C. Fruck and R. J. García López and M. Garczarczyk and D. Garrido Terrats and M. Gaug and N. Godinović and A. González Muñoz and S. R. Gozzini and D. Hadasch and M. Hayashida and J. Herrera and A. Herrero and D. Hildebrand and J. Hose and D. Hrupec and W. Idec and V. Kadenius and H. Kellermann and K. Kodani and Y. Konno and J. Krause and H. Kubo and J. Kushida and A. La Barbera and D. Lelas and N. Lewandowska and E. Lindfors and S. Lombardi and M. López and R. López-Coto and A. López-Oramas and E. Lorenz and I. Lozano and M. Makariev and K. Mallot and G. Maneva and N. Mankuzhiyil and K. Mannheim and L. Maraschi and B. Marcote and M. Mariotti and M. Martínez and D. Mazin and U. Menzel and M. Meucci and J. M. Miranda and R. Mirzoyan and A. Moralejo and P. Munar-Adrover and D. Nakajima and A. Niedzwiecki and K. Nilsson and K. Nishijima and K. Noda and N. Nowak and R. Orito and A. Overkemping and S. Paiano and M. Palatiello and D. Paneque and R. Paoletti and J. M. Paredes and X. Paredes-Fortuny and S. Partini and M. Persic and F. Prada and P. G. Prada Moroni and E. Prandini and S. Preziuso and I. Puljak and R. Reinthal and W. Rhode and M. Ribó and J. Rico and J. Rodriguez Garcia and S. Rügamer and A. Saggion and T. Saito and K. Saito and K. Satalecka and V. Scalzotto and V. Scapin and C. Schultz and T. Schweizer and S. N. Shore and A. Sillanpää and J. Sitarek and I. Snidaric and D. Sobczynska and F. Spanier and V. Stamatescu and A. Stamerra and T. Steinbring and J. Storz and M. Strzys and S. Sun 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 J. Thaele and O. Tibolla and D. F. Torres and T. Toyama and A. Treves and M. Uellenbeck and P. Vogler and R. M. Wagner and F. Zandanel and R. Zanin and F. D'Ammando and T. Hovatta and V. M. Larionov and W. Max-Moerbeck and M. Perri and A. C. S. Readhead and J. L. Richards and T. Sakamoto and R. D. Schwartz and F. Verrecchia and L. C. Reyes},
journal= {arXiv preprint arXiv:1409.3389},
year = {2014}
}
备注
17 pages, 15 figures, Accepted for publication in A&A