Physics
Scientific paper
Jul 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....5.2745s&link_type=abstract
Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I
Physics
Scientific paper
The Wide-field X-ray Monitor (WXM) is one of the scientific instruments carried on the High Energy Transient Explorer 2 (HETE-2) satellite launched in October 2000. The WXM consists of four identical Xe-filled one-dimensional position-sensitive proportional counters, two sets of one-dimensional coded apertures orthogonally mounted above the counters, and the main electronics. The WXM counters are sensitive to X-rays between 2 keV and 25 keV within a field-ofview of about 1.5 sr with a total detector area of about 350 cm2 . The combination of the apertures and the counters provides GRB locations with accuracy of 10 arcmin. The WXM plays a ma jor roll in the GRB localization and its spectroscopy in the energy range between 2 keV and 25 keV. Observing Crab nebula and Sco X-1, we have calibrated the detector alignment between the WXM and the optical camera system with 2 arcmin accuracy. The energy response of the detectors has also been calibrated using the Crab spectrum. We report in-orbit performance of the WXM instrument.
Donaghy Timothy
Fenimore Edward E.
Galassi Mark
Graziani Carlo
Hatsukade Izamu
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