Title: The eROSITA Final Equatorial Depth Survey (eFEDS)
Speaker: 刘腾
Institute: Max Planck Institute for Extraterrestrial Physics
Host: 顾为民
Time: 14:30-16:30, Thursday, October, 21
Location: Physics Building 552 (online)
Abstract:
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%.
Bio:
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。
主要工作集中在活动星系核与河外X射线巡天，包括7Ms Chandra南天深场巡天，Swift X射线星系团巡天，XMM-XXL和XMM-RM巡天，
以及eROSITA巡天。
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