arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.11208astro-ph.HE
收藏

费米大面积望远镜第四源目录数据发布2

Fermi Large Area Telescope Fourth Source Catalog Data Release 2

J. Ballet, T. H. Burnett, S. W. Digel, B. Lott

摘要:

我们提出了一个增量版本(4FGL-DR 2,数据发布2)的第四费米-LAT目录的伽马射线源。它基于50 MeV到1 TeV能量范围内前十年的科学数据,使用与4FGL目录八年数据相同的分析方法。更新所有源的光谱参数、光谱能量分布和关联。所有光源的光变曲线都是以1年为间隔重建的(不是2个月的间隔)。在5064个4FGL来源中,120个在10年内正式低于检测阈值(但仍保留在列表中),而53个新关联,4个关联被撤回。我们报告了723个新的来源,大多数刚刚超过检测阈值,其中两个被认为是确定的,341个在其他波长有一个合理的对应。

英文摘要:

We present an incremental version (4FGL-DR2, for Data Release 2) of the fourth Fermi-LAT catalog of gamma-ray sources. Based on the first ten years of science data in the energy range from 50 MeV to 1 TeV, it uses the same analysis methods as the 4FGL catalog did for eight years of data. The spectral parameters, spectral energy distributions and associations are updated for all sources. Light curves are rebuilt for all sources with 1-year intervals (not 2-month intervals). Among the 5064 4FGL sources, 120 are formally below the detection threshold over 10 years (but are kept in the list), while 53 are newly associated and four associations were withdrawn. We report 723 new sources, mostly just above the detection threshold, among which two are considered identified and 341 have a plausible counterpart at other wavelengths.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑