Extraction Slits for First-Order STIS Spectra

Details Extraction Slits for First-Order STIS Spectra Extraction Slits for First-Order STIS Spectra

Sep 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997stis.rept...13l&link_type=abstract

Instrument Science Report STIS 97-13, 38 pages

Computer Science

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

Scientific paper

Measurements of enclosed energy vs. extraction slit height and numerical simulations for first-order STIS spectra demonstrate the dependence of signal-to-noise (S/N) on the extraction slit height for different gratings, wavelengths, and signal levels. Slit heights of 11 pixels for G140L and G230L, and 7 pixels for the three CCD first-order modes are a reasonable compromise between photometric precision, achieved S/N, and spectral purity at most wavelengths. We recommend the implementation of these extraction slits for the pipeline and the default absolute flux calibration of archival STIS spectra of point sources.

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