The origin and behavior of the background in the large area counters on GINGA and its effect on the sensitivity
Abstract
The origin and behavior of background in the large area counter (LAC) on Ginga is discussed, and methods of background estimation are described. The size of residual systematic uncertainty in the background, after subtraction, is given, and its effect on the sensitivity of the instrument is discussed. At low energies the sensitivity of the LAC is limited mainly by confusion due to undetectable faint sources in the 1 x 2 deg field of view: the 3sigma level of this source confusion noise is 6 x 10 to the -12th erg/sq cm s in the 2-10-kev range.
- Publication:
-
Publications of the Astronomical Society of Japan
- Pub Date:
- 1989
- Bibcode:
- 1989PASJ...41..373H
- Keywords:
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- Astronomical Satellites;
- Background Radiation;
- Energy Spectra;
- Ginga Satellite;
- Proportional Counters;
- Spaceborne Astronomy;
- X Ray Astronomy;
- Charged Particles;
- Cosmic X Rays;
- Field Of View;
- Japanese Space Program;
- Satellite-Borne Instruments;
- Spacecraft Instrumentation