Transmission grating spectroscopy and the Advanced X-ray Astrophysics Facility (AXAF)

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Astronomical Spectroscopy, Gratings (Spectra), Grazing Incidence, X Ray Astronomy, X Ray Astrophysics Facility, Imaging Spectrometers, Spatial Distribution, Stellar Spectra

Scientific paper

The use of transmission gratings with grazing-incidence telescopes in celestial X-ray astrononmy is reviewed. The basic properties of transmission grating spectrometers and the use of 'phased' gratings to enhance the diffraction efficiency are outlined. The fabrication of the gratings is examined, giving special attention to the AXAF High Energy Transmission Grating. The performance of finite-period thick gratings is briefly discussed, and the performance of the transmission grating spectrometers planned for SPECTROSAT and AXAF are examined.

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