Be/脉冲星双星1A 0535+262在巨X射线爆发期间的伽马射线观测
高能天体物理现象
2015-05-27 v2
摘要
巨X射线爆发（光度约10^{37} erg s^{-1}）大约每5年从附近的Be/脉冲星双星1A 0535+262观测到一次。本文中，我们介绍了由2009年12月X射线爆发触发的、使用VERITAS在甚高能（VHE；E>100 GeV）对该源的观测。观测在爆发开始后不久启动，并提供了对该事件以及111天双星轨道的全面覆盖。在任何时候都没有明显的VHE发射。我们还检查了同时期使用Fermi/LAT在高能光子（HE；E>0.1 GeV）对1A 0535+262的观测数据，但未能在GeV能量探测到该源。使用Swift/XRT和RXTE/PCA测量的X射线连续谱可以很好地由黑体和热电子康普顿化发射的组合来描述。因此，伽马射线和X射线观测表明系统中缺乏显著的非热粒子布居。这使1A 0535+262区别于那些在GeV-TeV能量被探测到的Be X射线双星（如PSR B1259-63和LS I +61°303）。我们讨论了这些结果对理论模型的意义。
引用
@article{arxiv.1103.3250,
title = {Gamma-ray observations of the Be/pulsar binary 1A 0535+262 during a giant X-ray outburst},
author = {VERITAS collaboration and V. A. Acciari and E. Aliu and M. Araya and T. Arlen and T. Aune and M. Beilicke and W. Benbow and S. M. Bradbury and J. H. Buckley and V. Bugaev and K. Byrum and A. Cannon and A. Cesarini and L. Ciupik and E. Collins-Hughes and W. Cui and R. Dickherber and C. Duke and A. Falcone and J. P. Finley and L. Fortson and A. Furniss and N. Galante and D. Gall and S. Godambe and S. Griffin and R. Guenette and G. Gyuk and D. Hanna and J. Holder and G. Hughes and C. M. Hui and T. B. Humensky and A. Imran and P. Kaaret and M. Kertzman and H. Krawczynski and F. Krennrich and A. S. Madhavan and G. Maier and P. Majumdar and S. McArthur and P. Moriarty and R. A. Ong and A. N. Otte and D. Pandel and N. Park and J. S. Perkins and M. Pohl and H. Prokoph and J. Quinn and K. Ragan and L. C. Reyes and P. T. Reynolds and E. Roache and H. J. Rose and D. B. Saxon and G. H. Sembroski and G. Demet Senturk and A. W. Smith and G. Tešić and M. Theiling and S. Thibadeau and A. Varlotta and S. Vincent and M. Vivier and S. P. Wakely and J. E. Ward and T. C. Weekes and A. Weinstein and T. Weisgarber and S. Weng and D. A. Williams and M. Wood and B. Zitzer},
journal= {arXiv preprint arXiv:1103.3250},
year = {2015}
}
备注
28 pages, 4 figures; accepted by The Astrophysical Journal updated references