Contributed Talk - Splinter eROSITA

Wednesday, 14 September 2022, 17:11   (SFG 0140 / virtual eROSITA)

Enabling the first eROSITA based cluster cosmology through systematic analysis of optical imaging surveys

Matthias Klein, I-Non Chiu, Joseph Mohr, Sebastian Bocquet
LMU Muenchen

The eROSITA Final Equatorial Depth Survey (eFEDS) with an average exposure time of ~1.3 ks was designed to test the performance of the instruments and analysis methods meant to be applied to the all-sky survey. The success of this test has been shown in an extensive series of papers. One missing piece of science involved combining the X-ray measurements, optical follow-up and weak-lensing calibration to perform a cosmological analysis. Recently, the first results from a cosmological analysis of the eFEDS cluster sample became available. In this presentation I will show what we learned from the optical follow-up of the eFEDS sources with respect to crucial catalog properties such as sample completeness and purity and how it supported the cosmological analysis of the cluster sample.