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Proceedings Paper

Development and testing of the eROSITA mirror modules
Author(s): Peter Friedrich; Heinrich Bräuninger; Bernd Budau; Wolfgang Burkert; Vadim Burwitz; Konrad Dennerl; Josef Eder; Michael Freyberg; Roland Gaida; Gisela Hartner; Benedikt Menz; Elmar Pfeffermann; Peter Predehl; Christian Rohé; Reiner Schreib
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Paper Abstract

MPE will provide the X-ray Survey Telescope eROSITA for the Russian Spektrum-Roentgen-Gamma Mission. The mirror system consists of a compact bundle of seven co-aligned mirror modules with a focal length of 1600 mm and 54 nested mirror shells each. The 61 arcmin field-of-view (FoV) will yield a high grasp of about 1000 cm2deg2 around 1 keV. An angular resolution of 15 arcsec HEW on-axis (resulting in an average angular resolution of ~26 arcsec HEW over the field-of-view and ~30 arcsec including all optical and spacecraft error contributions) will help distinguish point sources from extended emission of galaxy clusters which are relevant for cosmological studies. During a four year allsky survey eROSITA will generate a new rich database of X-ray sources. In a second phase of the mission eROSITA will also perform pointed observations.

After a mirror development program the integration of flight mirror modules started in early 2011. Currently, the manufacturing of flight modules is ongoing and some of the partially integrated ones have already been X-ray tested. Calibration of completed mirror modules will start end of 2012. Parallel to the X-ray mirrors we have developed an X-ray baffle to suppress stray light from single reflections. It consists of precisely shaped and welded concentric Invar foils which will be mounted on top of each mirror module and aligned by optical means.

We report on the design and the mirror development program including the X-ray baffle and present the latest results from X-ray measurements.


Paper Details

Date Published: 17 September 2012
PDF: 8 pages
Proc. SPIE 8443, Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray, 84431S (17 September 2012); doi: 10.1117/12.926772
Show Author Affiliations
Peter Friedrich, Max-Planck-Institut für extraterrestrische Physik (Germany)
Heinrich Bräuninger, Max-Planck-Institut für extraterrestrische Physik (Germany)
Bernd Budau, Max-Planck-Institut für extraterrestrische Physik (Germany)
Wolfgang Burkert, Max-Planck-Institut für extraterrestrische Physik (Germany)
Vadim Burwitz, Max-Planck-Institut für extraterrestrische Physik (Germany)
Konrad Dennerl, Max-Planck-Institut für extraterrestrische Physik (Germany)
Josef Eder, Max-Planck-Institut für extraterrestrische Physik (Germany)
Michael Freyberg, Max-Planck-Institut für extraterrestrische Physik (Germany)
Roland Gaida, Max-Planck-Institut für extraterrestrische Physik (Germany)
Gisela Hartner, Max-Planck-Institut für extraterrestrische Physik (Germany)
Benedikt Menz, Max-Planck-Institut für extraterrestrische Physik (Germany)
Elmar Pfeffermann, Max-Planck-Institut für extraterrestrische Physik (Germany)
Peter Predehl, Max-Planck-Institut für extraterrestrische Physik (Germany)
Christian Rohé, Max-Planck-Institut für extraterrestrische Physik (Germany)
Reiner Schreib, Max-Planck-Institut für extraterrestrische Physik (Germany)


Published in SPIE Proceedings Vol. 8443:
Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray
Tadayuki Takahashi; Stephen S. Murray; Jan-Willem A. den Herder, Editor(s)

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