The calibration of eROSITA on SRG

Konrad Dennerl; Robert Andritschke; Heinrich Bräuninger; Wolfgang Burkert; Vadim Burwitz; Valentin Emberger; Michael Freyberg; Peter Friedrich; Roland Gaida; Stefanie Granato; Gisela Hartner; Andreas von Kienlin; Norbert Meidinger; Benedikt Menz; Peter Predehl

doi:10.1117/12.2562330

13 December 2020 The calibration of eROSITA on SRG

Konrad Dennerl, Robert Andritschke, Heinrich Bräuninger, Wolfgang Burkert, Vadim Burwitz, Valentin Emberger, Michael Freyberg, Peter Friedrich, Roland Gaida, Stefanie Granato, Gisela Hartner, Andreas von Kienlin, Norbert Meidinger, Benedikt Menz, Peter Predehl

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Proceedings Volume 11444, Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray; 114444Q (2020) https://doi.org/10.1117/12.2562330
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

The power of eROSITA (extended ROentgen Survey with an Imaging Telescope Array), the core instrument on the Russian–German Spectrum–Roentgen–Gamma (SRG) mission, is high sensitivity at high spectral, spatial, and temporal resolution over a large field of view. This is achieved by combining 7 coaligned X–ray telescope modules, each composed of 54 paraboloid / hyperboloid mirror shells in a Wolter–I geometry, to focus the X–rays through optical blocking filters onto PNCCDs with a total of 1 million pixels, providing a spectral resolution of 60 – 160 eV FWHM over an energy range 0.2 – 8 keV and a 1 degree field of view at a time resolution of 50 ms. In order to make full scientific use of the unique capabilities of eROSITA, all the individual components have to be calibrated. The initial ground calibration was done at the PANTER and PUMA facilities of MPE as well as at BESSY, and was supplemented by an in–orbit calibration. We report on the extensive and often challenging calibration activities performed on ground and in space.

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Konrad Dennerl, Robert Andritschke, Heinrich Bräuninger, Wolfgang Burkert, Vadim Burwitz, Valentin Emberger, Michael Freyberg, Peter Friedrich, Roland Gaida, Stefanie Granato, Gisela Hartner, Andreas von Kienlin, Norbert Meidinger, Benedikt Menz, and Peter Predehl "The calibration of eROSITA on SRG", Proc. SPIE 11444, Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray, 114444Q (13 December 2020); https://doi.org/10.1117/12.2562330

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