期刊
JOURNAL OF ASTRONOMICAL INSTRUMENTATION
卷 3, 期 2, 页码 -出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S225117171440008X
关键词
X-rays; polarization; black hole; InFOC mu S; X-Calibur
资金
- NASA [NNX10AJ56G, NNX12AD51G, NNX14AD19G]
- McDonnell Center for the Space Sciences to build the X-Calibur polarimeter
- National Science Foundation
- National Institutes of Health/National Institute of General Medical Sciences under NSF [DMR-0936384]
- NASA [NNX12AD51G, 52914, NNX14AD19G, 685542] Funding Source: Federal RePORTER
X-ray polarimetry promises to give qualitatively new information about high-energy astrophysical sources, such as binary black hole systems, micro-quasars, active galactic nuclei, neutron stars, and gamma-ray bursts. We designed, built and tested a X-ray polarimeter, X-Calibur, to be used in the focal plane of the balloon-borne InFOC mu S grazing incidence X-ray telescope. X-Calibur combines a low-Z scatterer with a Cadmium Zinc Telluride (CZT) detector assembly to measure the polarization of 20-80 keV X-rays making use of the fact that polarized photons scatter preferentially perpendicular to the electric field orientation. X-Calibur achieves a high detection efficiency of similar or equal to 80%. The X-Calibur detector assembly is completed, tested, and fully calibrated. The response to a polarized X-ray beam was measured successfully at the Cornell High Energy Synchrotron Source. This paper describes the design, calibration and performance of the X-Calibur polarimeter. In principle, a similar space-borne scattering polarimeter could operate over the broader 2-100 keV energy band.
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