用VERITAS在TeV能量下观测壳层型超新星遗迹仙后座A
高能天体物理现象
2010-04-30 v1 星系天体物理
摘要
我们报告了利用位于亚利桑那州的VERITAS立体成像大气切伦科夫望远镜阵列对壳层型超新星遗迹仙后座A在甚高能伽马射线波段的观测结果。这些观测的总曝光时间为22小时，累积于2007年9月至11月。与超新星遗迹仙后座A相关的伽马射线源在200 GeV以上被探测到，统计显著性为8.3个标准差。该伽马射线源的估计积分通量约为蟹状星云通量的3%。光子谱符合幂律dN/dE ~ E^(-Gamma)，谱指数Gamma = 2.61 ± 0.24（统计）± 0.2（系统）。数据与点状源一致。我们提供了分析结果的详细描述，并讨论了可能导致观测到的伽马射线发射的物理机制。
引用
@article{arxiv.1002.2974,
title = {Observations of the shell-type SNR Cassiopeia A at TeV energies with VERITAS},
author = {The VERITAS Collaboration and V. A. Acciari and E. Aliu and T. Arlen and T. Aune and M. Bautista and M. Beilicke and W. Benbow and D. Boltuch and S. M. Bradbury and J. H. Buckley and V. Bugaev and Y. Butt and K. Byrum and A. Cannon and A. Cesarini and Y. C. Chow and L. Ciupik and P. Cogan and W. Cui and R. Dickherber and C. Duke and T. Ergin and S. J. Fegan and J. P. Finley and G. Finnegan and P. Fortin and L. Fortson and A. Furniss and N. Galante and D. Gall and G. H. Gillanders and J. Grube and R. Guenette and G. Gyuk and D. Hanna and J. Holder and D. Huang and C. M. Hui and T. B. Humensky and P. Kaaret and N. Karlsson and M. Kertzman and D. Kieda and A. Konopelko and H. Krawczynski and F. Krennrich and M. J. Lang and S. LeBohec and G. Maier and S. McArthur and A. McCann and M. McCutcheon and J. Millis and P. Moriarty and R. A. Ong and D. Pandel and J. S. Perkins and M. Pohl and J. Quinn and K. Ragan and P. T. Reynolds and E. Roache and H. J. Rose and M. Schroedter and G. H. Sembroski and A. W. Smith and B. R. Smith and D. Steele and S. P. Swordy and M. Theiling and S. Thibadeau and A. Varlotta and V. V. Vassiliev and S. Vincent and R. G. Wagner and S. P. Wakely and J. E. Ward and T. C. Weekes and A. Weinstein and T. Weisgarber and S. Wissel and M. Wood},
journal= {arXiv preprint arXiv:1002.2974},
year = {2010}
}
备注
27 pages, 2 figures; Accepted for publication in ApJ