发现新的 TeV 伽马射线源：VER J0521+211
高能天体物理现象
2013-10-04 v1 宇宙学与河外天体物理
摘要
我们报告了基于 VERITAS 成像大气切伦科夫望远镜阵列的观测，发现了一个新的 TeV 伽马射线源 VER J0521+211。这些观测的动机源于在 Fermi-LAT 观测的第一年发现了一个包含>30 GeV 光子的星团。VER J0521+211 在 TeV 能段相对明亮，在 VERITAS 观测期间，其高于 0.2 TeV 的平均光子通量为 1.93 +/- 0.13_stat +/- 0.78_sys × 10^-11 cm^-2 s^-1。该源在所有波段（从光学到 TeV）均表现出强烈的日变异性，其峰值通量对应于 TeV 能段稳态蟹状星云通量的约 0.3 倍。后续在光学和 X 射线波段的观测将该新发现的 TeV 源归类为红移不确定的 BL Lac 型耀变体，尽管最近的测量表明 z=0.108。VER J0521+211 展现了耀变体在射电、光学、X 射线和伽马射线波长的所有定义特征。
引用
@article{arxiv.1308.5017,
title = {Discovery of a new TeV gamma-ray source: VER J0521+211},
author = {VERITAS Collaboration and S. Archambault and T. Arlen and T. Aune and M. Beilicke and W. Benbow and R. Bird and A. Bouvier and J. H. Buckley and V. Bugaev and K. Byrum and A. Cesarini and L. Ciupik and M. P. Connolly and W. Cui and M. Errando and A. Falcone and S. Federici and Q. Feng and J. P. Finley and L. Fortson and A. Furniss and N. Galante and D. Gall and G. H. Gillanders and S. Griffin and J. Grube and G. Gyuk and D. Hanna and J. Holder and G. Hughes and T. B. Humensky and P. Kaaret and M. Kertzman and Y. Khassen and D. Kieda and H. Krawczynski and F. Krennrich and S. Kumar and M. J. Lang and A. S Madhavan and G. Maier and P. Majumdar and S. McArthur and A. McCann and J. Millis and P. Moriarty and R. Mukherjee and A. O'Faolain de Bhroithe and R. A. Ong and A. N. Otte and N. Park and J. S. Perkins and M. Pohl and A. Popkow and H. Prokoph and J. Quinn and K. Ragan and L. C. Reyes and P. T. Reynolds and G. T. Richards and E. Roache and D. B. Saxon and G. H. Sembroski and A. W. Smith and D. Staszak and I. Telezhinsky and M. Theiling and A. Varlotta and V. V. Vassiliev and S. Vincent and S. P. Wakely and T. C. Weekes and A. Weinstein and R. Welsing and D. A. Williams and B. Zitzer and M. Bottcher and S. J. Fegan and P. Fortin and J. P. Halpern and Y. Y. Kovalev and M. L. Lister and J. Liu and A. B. Pushkarev and P. S. Smith},
journal= {arXiv preprint arXiv:1308.5017},
year = {2013}
}
备注
10 pages, 8 figures, 3 tables. Accepted by The Astrophysical Journal