STIS CCD Spectroscopic Flats C8 - late continuation

Details STIS CCD Spectroscopic Flats C8 - late continuation STIS CCD Spectroscopic Flats C8 - late continuation

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8797g&link_type=abstract

HST Proposal ID #8797

Physics

Hst Proposal Id #8797

Scientific paper

The Cycle 8 STIS CCD flat program provides monitoring information to S/N levels up to about 600 which should be sufficient for the vast majority of science observations. In Cycle 8 there are at least two GO programs using 35 orbits {GO 8115 PI Valenti, GO/DD 8789 PI Brown} that will obtain stellar spectroscopy with sufficient counts when co-added to reach S/N levels of order 10, 000 per resolution element. The primary science of each program focuses on time series photometry; for this the routine flat fields should be adequate given that the photometry will average over about 4000 pixels. Secondary, or archival science could however utilize the extremely high S/N spectra; for this purpose benefits would derive from having higher S/N flats. Given expected drifts of positions simulations suggest large gains in spectral fidelity with availability of flat fields at S/N of 1000 to 2000 per pixel. These internal observations taken in conjunction with the existing high count level GO programs will allow numerous "pushing the envelope" style tests to be conducted to much better quantify the potential of ultra high S/N spectroscopy with STIS and the stability of flat fields with time.

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