BATSE spectroscopy detector calibration

Details BATSE spectroscopy detector calibration BATSE spectroscopy detector calibration

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992exa.....2..307b&link_type=abstract

Experimental Astronomy (ISSN 0922-6435), vol. 2, no. 5, p. 307-330.

Astronomy and Astrophysics

Astronomy

22

Gamma Ray Observatory, Gamma Ray Spectrometers, Scintillation Counters, Calibrating, Gamma Ray Astronomy, Gamma Ray Bursts, Photomultiplier Tubes

Scientific paper

We describe the channel-to-energy calibration of the Spectroscopy Detectors of the Burst and Transient Source Experiment (BATSE) on the Compton Gamma Ray Observatory (GRO). These detectors consist of NaI(TI) crystals viewed by photomultiplier tubes whose output in turn is measured by a pulse height analyzer. The calibration of these detectors has been complicated by frequent gain changes and by nonlinearities specific to the BATSE detectors. Nonlinearities in the light output from the NaI crystal and in the pulse height analyzer are shifted relative to each other by changes in the gain of the photomultiplier tube. We present the analytical model which is the basis of our calibration methodology, and outline how the empirical coefficients in this approach were determined. We also describe the complications peculiar to the Spectroscopy Detectors, and how our understanding of the detectors' operation led us to a solution to these problems.

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