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Proceedings Paper

Calibration of the Stellar X-Ray Polarimeter
Author(s): John A. Tomsick; Enrico Costa; J. Dwyer; Ronald F. Elsner; E. Ford; Philip E. Kaaret; Robert Novick; Andrea E. Santangelo; Eric H. Silver; Paolo Soffitta; Martin C. Weisskopf; Klaus Ziock
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Paper Abstract

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.

Paper Details

Date Published: 15 October 1997
PDF: 11 pages
Proc. SPIE 3114, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VIII, (15 October 1997); doi: 10.1117/12.283780
Show Author Affiliations
John A. Tomsick, Columbia Univ. (United States)
Enrico Costa, Istituto di Astrofisica Spaziale (Italy)
J. Dwyer, Columbia Univ. (United States)
Ronald F. Elsner, NASA Marshall Space Flight Ctr. (United States)
E. Ford, Columbia Univ. (United States)
Philip E. Kaaret, Columbia Univ. (United States)
Robert Novick, Columbia Univ. (United States)
Andrea E. Santangelo, Istituto di Fisica Cosmica ed Applicazione dell'Informatica (Italy)
Eric H. Silver, Ctr. for Astrophysics (United States)
Paolo Soffitta, Istituto di Astrofisica Spaziale (Italy)
Martin C. Weisskopf, NASA Marshall Space Flight Ctr. (United States)
Klaus Ziock, Lawrence Livermore National Lab. (United States)

Published in SPIE Proceedings Vol. 3114:
EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VIII
Oswald H. W. Siegmund; Mark A. Gummin, Editor(s)

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