发稿时间:2021-07-26浏览次数:10

USTC Astronomy Colloquium Series: 2021 Spring
The eROSITA Final Equatorial Depth Survey (eFEDS)
刘腾  博士
MPE Germany
2021/7/27, 4:00pm , 点击链接入会,或添加至会议列表:https://meeting.tencent.com/s/oRJ1z4Ln9gmM
报告人:
刘腾,中科大03级00班本科生,13年在中科大天文系获得博士学位,13-16年留校从事博士后研究。10-12年在意大利Trieste天文台学习两年,16-17年在美国UMASS天文系交流工作一年,17年至今在德国马普地外物理所工作。主要工作集中在河外X射线巡天,包括CDFS,SWXCS,XMM-XXL,XMM-RM等,目前主要从事eROSITA相关研究。
摘要:
After the successful launch of the SRG mission in July 2019, eROSITA, the soft X-ray instrument aboard SRG, performed scanning observations of a large (140 deg^2) contiguous field, namely the eROSITA Final Equatorial Depth Survey (eFEDS), ahead of the planned four-year all-sky survey. eFEDS yielded a large sample of X-ray sources with very rich multi-band photometric and spectroscopic coverage. We present the eFEDS X-ray catalog (27910 sources) and the AGN catalog (21952 sources) selected from it. Through simulations, we test and optimize the eROSITA source detection procedures, and provide mock eFEDS catalogs, which are used to construct the selection function of AGN and galaxy clusters. Using a Bayesian method, we perform a systematic X-ray spectral analysis for all eFEDS sources. We find that the AGN catalog is dominated by X-ray unobscured sources, with an obscured (logNH>21.5) fraction of 10%.