In orbit performance of the Einstein Observatory/HEAO-2 Imaging Proportional Counter

Details In orbit performance of the Einstein Observatory/HEAO-2 Imaging Proportional Counter In orbit performance of the Einstein Observatory/HEAO-2 Imaging Proportional Counter

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981itns...28..869g&link_type=abstract

(IEEE, DOE, NASA, and NBS, Nuclear Science Symposium, 27th, Orlando, Fla., Nov. 5-7, 1980.) IEEE Transactions on Nuclear Science

Astronomy and Astrophysics

Astronomy

87

Heao 2, Proportional Counters, X Ray Imagery, X Ray Sources, Astronomical Observatories, Calibrating, Cosmic X Rays, Focal Plane Devices, Quantum Efficiency

Scientific paper

After two years of orbital operation, the IPC - a soft X-ray (0.2-4 keV) position sensitive proportional counter - continues to perform well after some initial gain changes, and is the most widely used focal plane instrument of the Einstein Observatory. X-ray images of several thousand cosmic X-ray sources have been obtained with a resolution of about 1.5 arcmin (FWHM) with a 1-deg field. Particle backgrounds are less than expected. The calibration of the instrument with respect to gain variations and spatial linearity is being refined by in-flight measurements.

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