Design of the Gravity and Extreme Magnetism Small Explorer (GEMS)

Details Design of the Gravity and Extreme Magnetism Small Explorer (GEMS) Design of the Gravity and Extreme Magnetism Small Explorer (GEMS)

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010head...11.4101e&link_type=abstract

American Astronomical Society, HEAD meeting #11, #41.01; Bulletin of the American Astronomical Society, Vol. 41, p.724

Astronomy and Astrophysics

Astronomy

Scientific paper

The Gravity and Extreme Magnetism Small explorer (GEMS) was recently selected for flight in 2014 by NASA and will make the first sensitive search for X-ray polarization across a wide set of source classes. GEMS will measure X-ray polarization by imaging photoelectron tracks using time projection chambers (TPCs). This technique enables high efficiency and, thus, good polarization sensitivity in the 2-10 keV band. There will be three TPCs, each behind thin foil mirrors similar to those flown on Suzaku. A Bragg reflection polarimeter may be included that can extend the sensitivity to 0.5 keV via the use of multilayers. The entire spacecraft, less the solar panels, will be rotated to enable measurement and correction of systematic errors. We will discuss the design of the GEMS mission.

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