The Extended Range X-Ray Telescope center director's discretionary fund report

Astronomy and Astrophysics – Astronomy

Scientific paper

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Charge Coupled Devices, Spaceborne Telescopes, X Ray Astronomy, X Ray Telescopes, Microscopy, Mirrors, Spatial Resolution, Ultraviolet Radiation, X Ray Spectroscopy

Scientific paper

An Extended Range X-Ray Telescope (ERXRT) of high sensitivity and spatial resolution capable of functioning over a broad region of the X-ray/XUV portion of the spectrum has been designed and analyzed. This system has been configured around the glancing-incidence Wolter Type I X-ray mirror system which was flown on the Skylab Apollo Telescope Mount as ATM Experiment S-056. Enhanced sensitivity over a vastly broader spectral range can be realized by the utilization of a thinned, back-illuminated, buried-channel Charge Coupled Device (CCD) as the X-ray/XUV detector rather than photographic film. However, to maintain the high spatial resolution inherent in the X-ray optics when a CCD of 30 micron pixel size is used, it is necessary to increase the telescope plate scale. This can be accomplished by use of a glancing-incidence X-ray microscope to enlarge and re-focus the primary image onto the focal surface of the CCD.

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