The On-Orbit Performance of the Galaxy Evolution Explorer
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- 17 January 2005
- journal article
- research article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 619 (1) , L7-L10
- https://doi.org/10.1086/424734
Abstract
We report the first year's on-orbit performance results for the Galaxy Evolution Explorer (GALEX), a NASA Small Explorer that is performing a survey of the sky in two ultraviolet bands. The instrument comprises a 50 cm diameter modified Ritchey-Chrétien telescope with a 125 field of view, selectable imaging and objective-grism spectroscopic modes, and an innovative optical system with a thin-film multilayer dichroic beam splitter that enables simultaneous imaging by a pair of photon-counting, microchannel-plate, delay-line readout detectors. Initial measurements demonstrate that GALEX is performing well, meeting its requirements for resolution, efficiency, astrometry, bandpass definition, and survey sensitivity.Keywords
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This publication has 5 references indexed in Scilit:
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