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Proceedings Paper

Concept of the ROSITA x-ray camera
Author(s): Elmar Pfeffermann; S. Bonerz; Heinrich W. Braeuninger; Ulrich G. Briel; Peter Friedrich; Robert Hartmann; Gisela D. Hartner; Gunther Hasinger; Horst Hippmann; Eckhard Kendziorra; Guenther Kettenring; Walter Kink; Norbert Meidinger; Siegfried Mueller; Peter Predehl; Heike Soltau; Lothar Strueder; Joachim E. Truemper
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Paper Abstract

The main scientific objective of the ROSITA mission is to extend the X-ray all-sky survey of ROSAT to higher energies to gain an unbiased sample of all types of celestial X-ray sources in the medium energy band. During this mission the whole sky will be scanned by seven imaging X-ray telescopes. The telescopes have different viewing directions with an offset angle between 4 and 6 deg. The focal plane instrumentation of the telescopes is based on a novel type of pn-CCD with a frame store, an advanced version of the pn-CC operating quite successfully on XMM-Newton. The pixel size is adapted to the mirror resolution and the fast readout time guaranties the required angular accuracy despite the scan motion. The X-ray camera carries seven separate CCDs arranged on a circle in the foci of the Wolter type I mirror systems of the seven telescopes. The CCDs are mounted on ceramic frames, which carry dedicated front-end electronics for each CCD. The CCDs are operated at a temperature of-80 deg C. Except for the entrance window, the CCDs are covered by graded shielding for suppression of fluorescent X-ray background, generated by cosmic rays in the surrounding materials. Filters in front of the the CCDs, inhibit optical and UV photons. For in-orbit calibration a radioactive source producing fluorescent X-rays in the desired energy band is provided. We will give an overview of the mechanical, thermal and electrical concept of the camera system.

Paper Details

Date Published: 11 March 2003
PDF: 8 pages
Proc. SPIE 4851, X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy, (11 March 2003); doi: 10.1117/12.461167
Show Author Affiliations
Elmar Pfeffermann, Max-Planck-Institut fuer extraterrestrische Physik (Germany)
S. Bonerz, Max-Planck-Institut fuer extraterrestrische Physik (Germany)
Heinrich W. Braeuninger, Max-Planck-Institut fuer extraterrestrische Physik (Germany)
Ulrich G. Briel, Max-Planck-Institut fuer extraterrestrische Physik (Germany)
Peter Friedrich, Max-Planck-Institut fuer extraterrestrische Physik (Germany)
Robert Hartmann, Max-Planck-Institut fuer extraterrestrische Physik (Germany)
Gisela D. Hartner, Max-Planck-Institut fuer extraterrestrische Physik (Germany)
Gunther Hasinger, Max-Planck-Institut fuer extraterrestrische Physik (Germany)
Horst Hippmann, Max-Planck-Institut fuer extraterrestrische Physik (Germany)
Eckhard Kendziorra, Eberhard-Karls-Univ. Tuebingen (Greece)
Guenther Kettenring, Max-Planck-Institut fuer extraterrestrische Physik (Germany)
Walter Kink, Max-Planck-Institut fuer Physik und Astrophysik (Germany)
Norbert Meidinger, Max-Planck-Institut fuer extraterrestrische Physik (Germany)
Siegfried Mueller, Max-Planck-Institut fuer Extraterrestrische Physik (Germany)
Peter Predehl, Max-Planck-Institut fuer extraterrestrische Physik (Germany)
Heike Soltau, Max-Planck-Institut fuer Extraterristrische Physik (Germany)
Lothar Strueder, Max-Planck-Institut fuer extraterrestrische Physik (Germany)
Joachim E. Truemper, Max-Planck-Institut fuer extraterrestrische Physik (Germany)


Published in SPIE Proceedings Vol. 4851:
X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy
Joachim E. Truemper; Harvey D. Tananbaum, Editor(s)

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