Abstract
On-orbit data characteristics of the Space Telescope Imaging Spectrograph (STIS) CCD aboard the Hubble Space Telescope have been explored with early calibrations in a number of limiting conditions. At a gain of 4 e- DN-1, STIS CCD data show excellent linearity at high count levels, even for extreme oversaturation of individual central pixels. At low count levels we interpret a position- and intensity-dependent nonlinearity in terms of charge transfer (in)efficiency in the parallel clocking direction and provide a simple model that accounts for this. A short time series of spectra was acquired at short-exposure times and high signal-to-noise ratio (S/N) on the binary system a Cen A and B enabling the shutter repeatability to be quantified at 0.0002 s. A direct demonstration of near-Poisson-limited time series with S/N > 3000 is shown.
Original language | English (US) |
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Pages (from-to) | 1009-1020 |
Number of pages | 12 |
Journal | Publications of the Astronomical Society of the Pacific |
Volume | 111 |
Issue number | 762 |
DOIs | |
State | Published - Aug 1999 |
All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science