Sky coverage of orbital detectors. Analytical approach

Details Sky coverage of orbital detectors. Analytical approach Sky coverage of orbital detectors. Analytical approach

2005-11-23

arxiv.org/abs/astro-ph/0511674v2

Astronomy and Astrophysics

Astrophysics

12pages, 7 figures

Scientific paper

Orbital detectors without pointing capability have to keep their field of view axis laying on their orbital plane, to observe the largest sky fraction. A general approach to estimate the exposure of each sky element for such detectors is a valuable tool in the R&D phase of a project, when the detector characteristics are still to be fixed. An analytical method to estimate the sky exposure is developed, which makes only few very reasonable approximations. The formulae obtained with this method are used to compute the histogram of the sky exposure of a hypothetical gamma-ray detector installed on the ISS. The C++ code used in this example is freely available on the http://cern.ch/casadei/software.html web page.

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