HAWC伽马射线天文台对蟹状星云的观测
高能天体物理现象
2017-07-05 v1
摘要
蟹状星云是天空中亮度最高的TeV伽马射线源，过去25年来一直被用作TeV天文学的参考源，用于新TeV仪器的校准与验证。2015年初建成的高海拔水切伦科夫天文台（HAWC）已在其几乎整个灵敏能谱范围内对蟹状星云进行了高显著性观测。HAWC的独特之处在于其宽视场（任意时刻近2球面度）和高能段覆盖能力（可达100 TeV）。HAWC的灵敏度随伽马射线能量提高而改善。在约1 TeV以上，其灵敏度得益于宽视场地面阵列迄今实现的最佳背景抑制和角分辨率。我们利用2014年11月至2016年6月共507个有效观测日的HAWC数据，对蟹状星云进行了时间积分分析。蟹状星云的能谱拟合为函数形式 。当 固定为7 TeV且拟合范围在1至37 TeV之间时，数据拟合良好，得到 ，，log。本文讨论并估计了此次HAWC测量的系统误差，在1至37 TeV范围内光子通量的系统误差约为±50%。蟹状星云通量的确认有助于确立HAWC仪器对天空巡天的灵敏度。HAWC巡天的灵敏度将超越当前一代天文台，并打开10 TeV以上三分之二天空的新视野。
引用
@article{arxiv.1701.01778,
title = {Observation of the Crab Nebula with the HAWC Gamma-Ray Observatory},
author = {A. U. Abeysekara and A. Albert and R. Alfaro and C. Alvarez and J. D. Álvarez and R. Arceo and J. C. Arteaga-Velázquez and H. A. Ayala Solares and A. S. Barber and N. Bautista-Elivar and A. Becerril and E. Belmont-Moreno and S. Y. BenZvi and D. Berley and J. Braun and C. Brisbois and K. S. Caballero-Mora and T. Capistrán and A. Carramiñana and S. Casanova and M. Castillo and U. Cotti and J. Cotzomi and S. Coutiño de León and E. de la Fuente and C. De León and T. DeYoung and B. L. Dingus and M. A. DuVernois and J. C. Díaz-Vélez and R. W. Ellsworth and D. W. Fiorino and N. Fraija and J. A. García-González and M. Gerhardt and A. González Munoz and M. M. González and J. A. Goodman and Z. Hampel-Arias and J. P. Harding and S. Hernandez and A. Hernandez-Almada and J. Hinton and C. M. Hui and P. Hüntemeyer and A. Iriarte and A. Jardin-Blicq and V. Joshi and S. Kaufmann and D. Kieda and A. Lara and R. J. Lauer and W. H. Lee and D. Lennarz and H. León Vargas and J. T. Linnemann and A. L. Longinotti and G. Luis Raya and R. Luna-García and R. López-Coto and K. Malone and S. S. Marinelli and O. Martinez and I. Martinez-Castellanos and J. Martínez-Castro and H. Martínez-Huerta and J. A. Matthews and P. Miranda-Romagnoli and E. Moreno and M. Mostafá and L. Nellen and M. Newbold and M. U. Nisa and R. Noriega-Papaqui and R. Pelayo and J. Pretz and E. G. Pérez-Pérez and Z. Ren and C. D. Rho and C. Rivière and D. Rosa-González and M. Rosenberg and E. Ruiz-Velasco and H. Salazar and F. Salesa Greus and A. Sandoval and M. Schneider and H. Schoorlemmer and G. Sinnis and A. J. Smith and R. W. Springer and P. Surajbali and I. Taboada and O. Tibolla and K. Tollefson and I. Torres and T. N. Ukwatta and L. Villaseñor and T. Weisgarber and S. Westerhoff and I. G. Wisher and J. Wood and T. Yapici and G. B. Yodh and P. W. Younk and A. Zepeda and H. Zhou},
journal= {arXiv preprint arXiv:1701.01778},
year = {2017}
}
备注
Submitted 2017/01/06 to the Astrophysical Journal