HAWC 与 H.E.S.S. 对银道面源的 TeV 发射观测
天体物理仪器与方法
2021-09-09 v3
摘要
高海拔水切伦科夫（HAWC）天文台和高能立体系统（H.E.S.S.）是地基甚高能伽马射线领域的两个领先设备。HAWC 采用水切伦科夫探测（WCD）技术，而 H.E.S.S. 是一组成像大气切伦科夫望远镜（IACT）。因此，这两台设施在多个方面存在差异，包括观测策略、视场大小和角分辨率，导致不同的分析方法。迄今为止，尚不清楚两类设备的观测结果是否一致：最近发现的若干 HAWC 源已由 IACT 进行跟进观测，但仅在少数情况下得到确认探测。在本文中，我们更进一步，通过对 H.E.S.S. 银道面巡天数据执行新的分析（采用 HAWC 与 H.E.S.S. 间可比较的分析技术）来试图解决先前结果之间的张力。两个数据集均选取 1 TeV 以上事件，将 H.E.S.S. 的点扩散函数展宽以接近 HAWC，并采用相似的本底估计方法。这是两台设备所观测银道面的首次详细比较。H.E.S.S. 能够确认七个先前未被 IACT 探测到的 HAWC 源中四个的伽马射线发射，而其余三个的测得流量低于 H.E.S.S. 数据集的灵敏度。总体伽马射线通量上的剩余差异可由系统不确定性解释。因此，我们确认了 WCD 与 IACT 技术之间一致的伽马射线天空图景。
引用
@article{arxiv.2107.01425,
title = {TeV emission of Galactic plane sources with HAWC and H.E.S.S},
author = {H. Abdalla and F. Aharonian and F. Ait Benkhali and E. O. Angüner and C. Arcaro and C. Armand and T. Armstrong and H. Ashkar and M. Backes and V. Baghmanyan and V. Barbosa Martins and A. Barnacka and M. Barnard and Y. Becherini and D. Berge and K. Bernlöhr and B. Bi and M. Böttcher and C. Boisson and J. Bolmont and M. de Bony de Lavergne and M. Breuhaus and R. Brose and F. Brun and P. Brun and M. Bryan and M. Büchele and T. Bulik and T. Bylund and S. Caroff and A. Carosi and T. Chand and S. Chandra and A. Chen and G. Cotter and M. Curyło and J. Damascene Mbarubucyeye and I. D. Davids and J. Davies and C. Deil and J. Devin and L. Dirson and A. Djannati-Ataï and A. Dmytriiev and A. Donath and V. Doroshenko and L. Dreyer and C. Duffy and J. Dyks and K. Egberts and F. Eichhorn and S. Einecke and G. Emery and J. -P. Ernenwein and K. Feijen and S. Fegan and A. Fiasson and G. Fichet de Clairfontaine and G. Fontaine and S. Funk and M. Füßling and S. Gabici and Y. A. Gallant and G. 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journal= {arXiv preprint arXiv:2107.01425},
year = {2021}
}