Rocket- and satellite-borne X-ray and γ-ray experiments.

Details Rocket- and satellite-borne X-ray and γ-ray experiments. Rocket- and satellite-borne X-ray and γ-ray experiments.

Oct 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ijrsp..24..219m&link_type=abstract

Indian J. Radio Space Phys., Vol. 24, No. 5, p. 219 - 244

Astronomy and Astrophysics

Astronomy

X-Ray Astronomy: Detectors

Scientific paper

The spectacular progress in X-ray astronomy has followed the successful refinements and adoption of measuring techniques in the X-ray range. Various observational methods employed in the astronomical observations are similar to those used in a radiation physics laboratory. The main considerations which characterize the experiments in X-ray astronomy are: (i) the strong attenuation of the X-ray photons in the atmosphere thereby requiring observations at higher altitudes above 40 km and (ii) the photon limited regime, because the photon flux from even the strongest X-ray source is so low that individual photon counting is unavoidable. This coupled with the fact that absorption cross-sections at higher X-ray energies are quite low, makes the choice of X-ray detectors for astronomical use rather limited. This, in turn, has limited the variety of experiments being conducted in the X-ray and γ-ray regions. Presently, apart from the state-of-art detectors, many new concepts specifically applicable to X-ray bands are being explored. The paper traces the history of the rocket- and satellite-borne instruments and presents a brief summary of the current practices and future projections.

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