The First Flight of ProtoEXIST1: Advanced Prototype CZT Coded Aperture Telescope

Details The First Flight of ProtoEXIST1: Advanced Prototype CZT Coded Aperture Telescope The First Flight of ProtoEXIST1: Advanced Prototype CZT Coded Aperture Telescope

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010head...11.4803a&link_type=abstract

American Astronomical Society, HEAD meeting #11, #48.03; Bulletin of the American Astronomical Society, Vol. 41, p.740

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ProtoEXIST1 is a pathfinder for the EXIST-HET, a coded aperture hard X-ray telescope with a 4.5 m2 CZT detector plane a 90x70 degree field of view to be flown as the primary instrument on the EXIST mission and is intended to monitor the full sky every 3 h in an effort to locate GRBs and other high energy transients. ProtoEXIST1 consists of a 256 cm2 tiled CZT detector plane containing 4096 pixels composed of an 8x8 array of individual 2.0x2.0 cm2 CZT detector modules each with a 8x8 pixilated anode configured as a coded aperture telescope with a fully coded 10x10 degree field of view employing passive side shielding and an active CsI anti-coincidence rear shield, recently completed its maiden flight out of Ft. Sumner, NM on the 9th of October 2009. During the duration of its 6 hour flight on-board calibration of the detector plane was carried out utilizing a single tagged 198 nCi Am-241 source along with the simultaneous measurement of the background spectrum and an observation of Cygnus X-1. Here we recount the events of the flight and report on the detector performance in a near space environment.

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