论文标题
费米大面积望远镜第四源目录数据版本2
Fermi Large Area Telescope Fourth Source Catalog Data Release 2
论文作者
论文摘要
我们提出了伽马射线源第四部费米 - 拉特目录的增量版本（4FGL-DR2，对于数据发行2）。基于能量范围从50 MEV到1 TEV的最初十年的科学数据，它使用了与4FGL目录相同的分析方法，用于八年的数据。所有来源都更新了光谱参数，光谱能量分布和关联。对所有1年间隔（而不是2个月间隔）的所有来源重建光曲线。在5064 4FGL来源中，有120个正式低于10年的检测阈值（但保存在列表中），而53个新相关，撤回了4个关联。我们报告了723个新来源，大部分位于检测阈值之上，其中两个被认为是确定的，而341个在其他波长下具有合理的对应物。
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detection threshold over 10 years (but are kept in the list), while 53 are newly associated and four associations were withdrawn.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.
