The Photometric Performance of WFC3/UVIS: Temporal Stability Through Year 1

Details The Photometric Performance of WFC3/UVIS: Temporal Stability Through Year 1 The Photometric Performance of WFC3/UVIS: Temporal Stability Through Year 1

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010wfc..rept...14k&link_type=abstract

Instrument Science Report WFC3 2010-14, 12 pages

Physics

Hubble Space Telescope, Hst, Space Telescope Science Institute, Wfc3, Wide Field Camera 3

Scientific paper

We analyze multiple observations of three bright HST spectrophotometric standard stars obtained with WFC3 UVIS1 and UVIS2 in order to establish the temporal stability of the instrument over its first year of science operations. Observations of the three stars, GD 153, G191B2B, and GRW+70d5824 were obtained at multiple dither positions at each epoch and in most Wide (W) and Medium (M) band filters. The cadence of the observations was varied from once per week shortly after the instrument was installed in Hubble in the summer of 2009 (i.e., during SMOV) to once ever few months toward the end of the first year. Analysis of the high signal-to-noise pho- tometry in W and M bands indicates that the instrument is photometrically stable, with measured variations that are <0.4%.

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