Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974csgr.conf..363w&link_type=abstract
In ESRO The Context and Status of Gamma Ray Astronomy p 363-368 (SEE N75-25813 16-93)
Astronomy and Astrophysics
Astronomy
Cos-B Satellite, Earth Albedo, Gamma Rays, Satellite-Borne Instruments, Background Radiation, Earth Atmosphere, Galactic Radiation, High Altitude, Radiation Counters, Radiation Sources, Satellite Observation, Satellite Orbits, Sensitivity, Terrestrial Radiation
Scientific paper
It is suggested that a cross check of the sensitivities of different satellite-borne gamma ray detectors might be achieved by using the earth's atmosphere as a calibration source. An intensity of gamma rays above 100 MeV at an altitude of 500 km is computed which is consistent with the observed counting rate of OSO-3. If these results can be extrapolated to greater distances and lower energies, they may be folded with the response of the COS-B experiment (as measured at accelerators) to give an estimate of the counting rate to be expected as a function of distance from the earth and the angle between the experiment axis and the earth-satellite vector. The results of such extrapolations are discussed in terms of their implications for a possible orbital calibration of COS-B and for the observation of sources in directions close to the earth.
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