STIS/CCD Time Series Photometry with Saturated Data

Details STIS/CCD Time Series Photometry with Saturated Data STIS/CCD Time Series Photometry with Saturated Data

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999stis.rept....5g&link_type=abstract

STIS Instrument Science Report 99-05, 15 pages

Physics

Hubble Space Telescope, Hst, Space Telescope Science Institute, Stis, Space Telescope Imaging Spectrograph

Scientific paper

STIS/CCD data were acquired in a time series mode on a Cen A & B to test limitations to ultra high Signal to Noise (S/N) capabilities. In order to reach a Poisson limited noise level of nearly 40,000 on a Cen A the data were acquired in a spectral mode to spread the image over a full row of pixels, and with an exposure time that led to strong over-saturation. Each 10s exposure resulted in detection of ~ e- for a Cen A and ~ e- for a Cen B, with the latter spectrum just at saturation in some spectral regions. I discuss the data characteristics in detail and present time series results under a reasonable analysis approach. Simple interpretations from this one orbit of calibration data are hindered as a result of unusually large instrument drifts. A S/N greater than 9400 per exposure was reached for a Cen A, and greater than 6800 for a Ce

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