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21 December 1988 A Hard X-Ray Spectrometer For High Angular Resolution Observations Of Cosmic Sources
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LAXRIS (large area x-ray imaging spectrometer) is an experimental, balloon-borne, hard x-ray telescope that consists of a coaligned array of x-ray imaging spectrometer modules capable of obtaining high angular resolution (1-3 arcminutes) with moderate energy resolution in the 20- to 300-keV region. Each spectrometer module consists of a CsI(Na) crystal coupled to a position-sensitive phototube with a crossed-wire, resisitive readout. Imaging is provided by a coded aperture mask with a 4-m focal length. The high angular resolution is coupled with rather large area (-800 cm') to provide good sensitivity. Results are presented on performance and overall design. Sensitivity estimates are derived from a Monte-Carlo code developed to model the LAXRIS response to background encountered at balloon altitudes. We discuss a variety of observations made feasible by high angular resolution. For instance, spatially resolving the nonthermal x-ray emission from clusters of galaxies is suggested as an ideal program for LAXRIS.
© (1988) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
C. J. Hailey, K. P. Ziock, F. Harrison, S. M. Kahn, D. Liedahl, P. M. Lubin, and M. Seiffert "A Hard X-Ray Spectrometer For High Angular Resolution Observations Of Cosmic Sources", Proc. SPIE 0982, X-Ray Instrumentation in Astronomy II, (21 December 1988);


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