Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997spie.3114..373t&link_type=abstract
Proc. SPIE Vol. 3114, p. 373-383, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VIII, Oswald H. Siegmund; Mark A. Gumm
Astronomy and Astrophysics
Astronomy
2
Scientific paper
The stellar x-ray polarimeter (SXRP) will be more than an order of magnitude more sensitive than any previous x-ray polarimeter in the 2 - 15 keV energy band. The SXRP is a focal plane detector for a Danish-Russian SODART telescope, which will be launched on the Russian spectrum-x-gamma (SXG) mission. The SXRP exploits the polarization dependence of Bragg reflection from a graphite crystal, and of Thomson scattering from a target of metallic lithium. The SXRP flight model (FM) was calibrated at a facility at Lawrence Livermore National Laboratory (LLNL) equipped with polarized and unpolarized x-ray sources producing x-rays in the band pass for the graphite and lithium scatterers. By adjusting the orientation of the SXRP with respect to the incident x-ray beam, it was possible to simulate the converging beam from a SODART telescope and to measure the SXRP response to telescope pointing errors. In this paper, we describe the SXRP-FM calibration and present results for the graphite polarimeter.
Costa Enrico
Dwyer Joseph
Elsner Ronald F.
Ford Edward
Kaaret Philip E.
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