The Flat Fielding and Achievable Signal-to-Noise of the MAMA Detectors
نویسندگان
چکیده
The Space Telescope Imaging Spectrograph (STIS) was designed to achieve a signal-to-noise of at least 100:1 per resolution element. MAMA observations during Servicing Mission Orbital Verification (SMOV) confirm that this specification can be met. From analysis of a single spectrum of GD153, with counting statistics of ∼ 165 a S/N of ∼ 125 is achieved per spectral resolution element in the FUV over the spectral range of 1280Å to 1455Å. Co-adding spectra of GRW+70D5824 to increase the counting statistics to ∼ 300 yields a S/N of ∼ 190 per spectral resolution element over the region extending from 1347Å to 1480Å in the FUV. In the NUV, a single spectrum of GRW+70D5824 with counting statistics of ∼ 200 yields a S/N of ∼ 150 per spectral resolution element over the spectral region extending from 2167 to 2520Å. Details of the flat field construction, the spectral extraction, and the definition of a spectral resolution element will be described in the text.
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تاریخ انتشار 1998