利用 VERITAS 搜寻 Geminga 高于 100 GeV 的脉冲辐射
高能天体物理现象
2015-06-23 v1
摘要
我们展示了利用 VERITAS 甚高能伽马射线望远镜阵列对 Geminga 脉冲星 (PSR J0633+1746) 进行 71.6 小时观测的结果。使用源自 XMM-\emph{Newton} 和 \emph{Fermi}-LAT 空间望远镜记录数据的 Geminga 脉冲星计时解，对 2007 年 11 月至 2013 年 2 月期间用 VERITAS 获取的数据进行了相位折叠。未观测到高于 100 GeV 的显著脉冲辐射，我们在 95% 置信水平上报告了高于 135 GeV（光谱分析阈值）的积分流量上限，对于辐射轮廓中的两个主峰，该上限分别为 4.0 s cm 和 1.7 s cm。将这些上限与基于 \emph{Fermi}-LAT 五年数据确定的相位分辨光谱能量分布相结合，限制了 Geminga 脉冲星辐射谱在 50 GeV 以上可能的硬化。
引用
@article{arxiv.1412.4734,
title = {A Search for Pulsations from Geminga Above 100 GeV with VERITAS},
author = {E. Aliu and S. Archambault and A. Archer and T. Aune and A. Barnacka and M. Beilicke and W. Benbow and R. Bird and J. H. Buckley and V. Bugaev and K. Byrum and J. V Cardenzana and M. Cerruti and X. Chen and L. Ciupik and M. P. Connolly and W. Cui and H. J. Dickinson and J. Dumm and J. D. Eisch and M. Errando and A. Falcone and Q. Feng and J. P. Finley and H. Fleischhack and P. Fortin and L. Fortson and A. Furniss and G. H. Gillanders and S. Griffin and S. T. Griffiths and J. Grube and G. Gyuk and N. Hakansson and D. Hanna and J. Holder and T. B. Humensky and C. A. Johnson and P. Kaaret and P. Kar and M. Kertzman and D. Kieda and F. Krennrich and S. Kumar and M. J. Lang and M. Lyutikov and A. S Madhavan and G. Maier and S. McArthur and A. McCann and K. Meagher and J. Millis and P. Moriarty and R. Mukherjee and D. Nieto and A. O'Faolain de Bhroithe and R. A. Ong and A. N. Otte and N. Park and M. Pohl and A. Popkow and H. Prokoph and E. Pueschel and J. Quinn and K. Ragan and L. C. Reyes and P. T. Reynolds and G. T. Richards and E. Roache and M. Santander and G. H. Sembroski and K. Shahinyan and A. W. Smith and D. Staszak and I. Telezhinsky and J. V. Tucci and J. Tyler and A. Varlotta and S. Vincent and S. P. Wakely and A. Weinstein and D. A. Williams and A. Zajczyk and B. Zitzer},
journal= {arXiv preprint arXiv:1412.4734},
year = {2015}
}
备注
7 pages, 2 figures, 2 tables. Accepted for publication in ApJ