The Calibration of the ROSAT HRI Particle Background

Details The Calibration of the ROSAT HRI Particle Background The Calibration of the ROSAT HRI Particle Background

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apjs..117..233s&link_type=abstract

Astrophysical Journal Supplement v.117, p.233

Astronomy and Astrophysics

Astronomy

25

Instrumentation: Detectors, Space Vehicles, X-Rays: General

Scientific paper

A calibration for the particle background (PB) of the ROSAT High Resolution Imager (HRI) is presented. It is found that the PB rate is temporally a relatively stable function of the subsatellite geographic position and that the average master veto (MV) signal of the Position Sensitive Proportional Counter is a good template of that function. By determining the general correlation between the average MV signal and PB rate as a function of time and scaling the general correlation by an individual observation's light curve, an accurate PB model for that observation can be produced. Detector maps for the distribution of PB events and the distribution of exposure (including vignetting, detector artifacts, and quantum efficiency variations) are also presented. The maps were created from Earth-block data collected throughout the mission.

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