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Proceedings Paper

The GEMS photoelectric x-ray polarimeters
Author(s): J. K. Black; P. Deines-Jones; J. E. Hill; T. Iwahashi; K. Jahoda; P. Kaaret; T. R. Kallman; C. J. Martoff; Z. Prieskorn; J. Swank; T. Tamagawa
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Paper Abstract

The Gravity and Extreme Magnetism Small Explorer (GEMS) is an astrophysical observatory dedicated to X-ray polarimetry (2-10 keV) and is being developed for launch in 2014. To maximize the polarization sensitivity of the observatory, GEMS uses polarimeters based on the photoelectric effect with a gas micropattern time projection chamber (TPC). We describe the TPC polarimeter concept and the details of the GEMS implementation, including factors that affect the ultimate polarization sensitivity, including quantum efficiency, modulation factor, systematic errors, and background.

Paper Details

Date Published: 30 July 2010
PDF: 11 pages
Proc. SPIE 7732, Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray, 77320X (30 July 2010); doi: 10.1117/12.857736
Show Author Affiliations
J. K. Black, Rock Creek Scientific (United States)
NASA Goddard Space Flight Ctr. (United States)
P. Deines-Jones, NASA Goddard Space Flight Ctr. (United States)
J. E. Hill, CRESST/Universities Space Research Association (United States)
NASA Goddard Space Flight Ctr. (United States)
T. Iwahashi, RIKEN (Japan)
Tokyo Univ. of Science (Japan)
K. Jahoda, NASA Goddard Space Flight Ctr. (United States)
P. Kaaret, The Univ. of Iowa (United States)
T. R. Kallman, NASA Goddard Space Flight Ctr. (United States)
C. J. Martoff, Temple Univ. (United States)
Z. Prieskorn, The Univ. of Iowa (United States)
J. Swank, NASA Goddard Space Flight Ctr. (United States)
T. Tamagawa, RIKEN (Japan)
Tokyo Univ. of Science (Japan)


Published in SPIE Proceedings Vol. 7732:
Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray
Monique Arnaud; Stephen S. Murray; Tadayuki Takahashi, Editor(s)

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