Fringe Correction for STIS Near-IR Long-Slit Spectra using Contemporaneous Tungsten Flat Fields

Details Fringe Correction for STIS Near-IR Long-Slit Spectra using Contemporaneous Tungsten Flat Fields Fringe Correction for STIS Near-IR Long-Slit Spectra using Contemporaneous Tungsten Flat Fields

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...191.1803g&link_type=abstract

American Astronomical Society, 191st AAS Meeting, #18.03; Bulletin of the American Astronomical Society, Vol. 29, p.1239

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We report on the accuracy of fringe removal for STIS long-slit near-IR spectra using contemporaneous flats (taken during the course of science data collection). In case of point sources, we use tungsten flats taken through a small slit to mimic illumination by a point source. In case of extended sources, we use long-slit spectra of Jupiter's moon Io as test cases. We find that in case of the G750L grating, fringe residuals can be reduced to below the 1% level, for both point sources and extended objects. We will also compare these results with those obtained by using a library of long-slit in-flight flats whereby the fringes in the flats are matched to observed spectra by cross-correlation.

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