In-flight Calibration of the HETE-2 WXM Detector Response

Details In-flight Calibration of the HETE-2 WXM Detector Response In-flight Calibration of the HETE-2 WXM Detector Response

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aipc..727..618s&link_type=abstract

GAMMA-RAY BURSTS: 30 YEARS OF DISCOVERY: Gamma-Ray Burst Symposium. AIP Conference Proceedings, Volume 727, pp. 618-621 (2004).

Computer Science

Gamma-Ray Sources, Gamma-Ray Bursts, X- And Gamma-Ray Telescopes And Instrumentation, Spaceborne And Space Research Instruments, Apparatus, And Components

Scientific paper

We present the in-flight calibration results of the detector response matrices of the X-ray instrument, Wide-field X-ray Monitor (WXM), on board the HETE-2 satellite. WXM consists of four one-dimensional position-sensitive proportional counters and two sets of one-dimensional coded aperture. Its energy range is 2-25 keV.
The detector response matrix (DRM) of WXM is calculated numerically using the ground measurements for each anode wire. It is then calibrated with the observation of the Crab nebula in December 2001 and January 2002. The spectral parameters and the normalization of the spectra are investigated at various incident angles, and compared with the known values in literature. With the current DRM, the derived spectral parameters are mostly consistent with the values in literature, expect for 10-20% uncertainty in normalization for individual anode wires, and at large incidence angles.

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