Spectroscopy and variability mission in x-ray astronomy: Assessment study

Astronomy and Astrophysics – Astronomy

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Esa Satellites, Variability, X Ray Astronomy, X Ray Sources, X Ray Spectroscopy, Active Galaxies, Cyclotron Radiation, Proportional Counters, Quasars, Radiation Counters, Radio Bursts, Radio Galaxies, Spaceborne Astronomy, Supernova Remnants

Scientific paper

An assessment study of an X-ray astronomical observatory satellite is presented. The proposed spectroscopy and variability mission is designed to study carefully selected individual sources. The principal categories of objects to be studied are: nuclei of active galaxies and quasars, clusters of galaxies, X-ray emitting binary systems and their associated black holes, neutron stars or white dwarfs, X-ray burst sources, supernova remnants, and active stars and stellar coronae. A set of three instruments is proposed for the mission. The crystal spectrometers will follow iron emission and absorption features. The large area proportional counter array will have the high photon collecting power necessary to study variability in faint sources and to provide a monitor function for the crystal spectrometers. The phoswich detector will extend the spectral and variability measurements from a few keV to some 200 keV and will permit the detailed study of the recently discovered cyclotron features.

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