MAGIC 望远镜对遥远 TeV 耀变体 PKS 1424+240 的多波段长期研究
高能天体物理现象
2014-09-05 v2 宇宙学与河外天体物理
摘要
我们展示了利用 MAGIC 望远镜对耀变体 PKS 1424+240 的甚高能 (VHE; E > 100 GeV) 伽马射线辐射的研究。本文的主要目的是对该耀变体进行多波段光谱表征和建模；最近发现其红移下限为 z > 0.6，使其成为最有希望的最遥远 VHE 源候选体，因而尤为引人关注。2009 年至 2011 年间，MAGIC 望远镜对该源进行了总计约 33.6 小时的 VHE 伽马射线观测。该源在 2009 年和 2010 年的 VHE 伽马射线观测中仅被边缘探测到，随后在 2011 年的一次光学爆发期间确认了探测结果。叠加样本的综合显著性约为 7.2 sigma。不同观测活动期间测得的微分光谱可用陡峭的幂律描述，其指数范围从 3.5 +/- 1.2 到 5.0 +/- 1.7。经河外背景光吸收修正后的 MAGIC 光谱，在系统误差范围内，与 Fermi-LAT 在 2009-2011 年间观测到的较低能量平均光谱平滑连接。吸收修正后的 MAGIC 光谱在高达 400 GeV 的范围内是平坦的，没有明显的下降趋势。多波段光变曲线显示射电和光学波段的流量增加，这可能表明它们源自喷流的同一区域。所构建的非同时性能量分布的两个峰值之间存在巨大间隔，如果应用单区同步自康普顿模型，则需要极高的多普勒因子。我们发现，如果该源位于 z~0.6 处，双组分同步自康普顿模型能很好地描述该源的能量分布。
引用
@article{arxiv.1401.0464,
title = {MAGIC long-term study of the distant TeV blazar PKS 1424+240 in a multiwavelength context},
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 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 S. Cutini and D. Gasparrini and A. Furniss and T. Hovatta and T. Kangas and E. Kankare and J. Kotilainen and M. Lister and A. Lähteenmäki and W. Max-Moerbeck and V. Pavlidou and A. Readhead and J. Richards},
journal= {arXiv preprint arXiv:1401.0464},
year = {2014}
}
备注
15 pages, 8 figures. A&A accepted for publication