A Luminous and Isolated Gamma-Ray Flare from the Blazar B2 1215+30
A Luminous and Isolated Gamma-Ray Flare from the Blazar B2 1215+30
复制标题
耀变体 B2 1215 30 发出的发光且孤立的伽马射线耀斑
DOI：
10.3847/1538-4357/836/2/205
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
F. Zefi
中科院分区：
文献类型：
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作者：
A. Abeysekara;S. Archambault;A. Archer;W. Benbow;R. Bird;M. Buchovecky;J. Buckley;V. Bugaev;K. Byrum;M. Cerruti;Xuhui Chen;L. Ciupik;W. Cui;W. Cui;H. Dickinson;J. Eisch;M. Errando;M. Errando;A. Falcone;Q. Feng;J. Finley;H. Fleischhack;L. Fortson;A. Furniss;G. Gillanders;S. Griffin;J. Grube;M. Hütten;N. Håkansson;D. Hanna;J. Holder;T. Humensky;C. Johnson;P. Kaaret;P. Kar;M. Kertzman;D. Kieda;M. Krause;F. Krennrich;S. Kumar;M. Lang;G. Maier;S. McArthur;A. McCann;K. Meagher;P. Moriarty;R. Mukherjee;Thanh Huy Nguyen;D. Nieto;R. Ong;A. Otte;N. Park;V. Pelassa;M. Pohl;A. Popkow;E. Pueschel;J. Quinn;K. Ragan;P. Reynolds;G. Richards;E. Roache;C. Rulten;M. Santander;G. Sembroski;K. Shahinyan;D. Staszak;I. Telezhinsky;J. Tucci;J. Tyler;S. Wakely;O. Weiner;A. Weinstein;A. Wilhelm;D. Williams;S. Fegan;B. Giebels;D. Horan;A. Berdyugin;J. Kuan;E. Lindfors;K. Nilsson;A. Oksanen;H. Prokoph;R. Reinthal;L. Takalo;F. Zefi
B2 1215+30是一颗BL-Lac类型的blazar，它首先是由魔术大气切伦科夫望远镜在TeV能量下探测到的，随后被非常高能的辐射成像望远镜阵列系统(VERITAS)天文台用2009年至2012年收集的数据证实。2014年2月08年，VERITAS在对同一视场内的blazar 1ES 1218+304进行常规监测观测时，从B2 1215+30探测到一次大范围耀斑。TeV流量达到蟹状星云流量的2.4倍，变化时间尺度为<；3.6小时。费米-LAT、SWIFT和托拉天文台的多波长观测揭示了一个相关的高GeV通量状态，没有显著的光学对应物与耀斑相对应，具有伽马射线光度超过同步加速器光度的光谱能量分布。在单区轻子模型的框架下解释时，观测到的发射意味着高度的束流，多普勒因子δ>；10，以及光谱指数p<；2.3的电子布居。
B2 1215+30 is a BL-Lac-type blazar that was first detected at TeV energies by the MAGIC atmospheric Cherenkov telescopes and subsequently confirmed by the Very Energetic Radiation Imaging Telescope Array System (VERITAS) observatory with data collected between 2009 and 2012. In 2014 February 08, VERITAS detected a large-amplitude flare from B2 1215+30 during routine monitoring observations of the blazar 1ES 1218+304, located in the same field of view. The TeV flux reached 2.4 times the Crab Nebula flux with a variability timescale of < 3.6 hr . Multiwavelength observations with Fermi-LAT, Swift, and the Tuorla Observatory revealed a correlated high GeV flux state and no significant optical counterpart to the flare, with a spectral energy distribution where the gamma-ray luminosity exceeds the synchrotron luminosity. When interpreted in the framework of a one-zone leptonic model, the observed emission implies a high degree of beaming, with Doppler factor δ > 10 , and an electron population with spectral index p < 2.3 .