Physics – Optics
Scientific paper
May 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...192.1406r&link_type=abstract
American Astronomical Society, 192nd AAS Meeting, #14.06; Bulletin of the American Astronomical Society, Vol. 30, p.839
Physics
Optics
Scientific paper
The Reflection Grating Spectrometer (RGS) aboard XMM is a high throughput, dispersive soft X-Ray spectrometer designed to operate with a resolving power of a few hundred between 5 and 35 Angstroms in first order. Arrays of grating replicas (RGAs), assembled to work as single dispersive optics, intercept roughly 45% of the converging light behind the Mirror Module (MM) exit apertures on two of the three nested-shell X-Ray telescopes. Dispersed light is read out on the two, 300mm long, back-illuminated CCD arrays, housed in the RGS focal-plane cameras (RFCs). In short, XMM/RGS offers unrivaled soft X-Ray spectroscopic collection area. The two flight model RGAs were assembled at Columbia Astrophysics Lab and have already undergone end-to-end testing: both at MPE/Panter and at the XMM Vertical Facility (Centre Spatial de Liege). Results from these measurement campaigns will be presented, and they indicate the expected flight performance of the XMM/RGS spectrometer system.
Brinkman Albert
Cottam Jean
Decker Thomas
den Herder JW.
Kahn Sophia
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