Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011head...12.3705g&link_type=abstract
American Astronomical Society, HEAD meeting #12, #37.05
Astronomy and Astrophysics
Astronomy
Scientific paper
The Gravity and Extreme Magnetism SMEX (GEMS) mission was selected by NASA for flight in 2014. GEMS will make the first sensitive survey of X-ray polarization across a wide set of source classes including stellar black holes, Seyfert galaxies and quasars, blazars, rotation and accretion-powered pulsars, magnetars, shell supernova remnants and pulsar wind nebulae. GEMS employs grazing-incidence foil mirrors and novel time-projection chamber (TPC) polarimeters leveraging the photoelectric effect to image the charge tracks of photoelectrons produced by 2 - 10 keV X-rays. We present an overview of the methods that will be used for ground calibration of the TPC polarimeters and the development of polarized and unpolarized X-ray sources for this purpose.
Gall Daniel D.
GEMS Team
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