Dithering strategies for WFC3

Details Dithering strategies for WFC3 Dithering strategies for WFC3

Jun 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010wfc..rept....9d&link_type=abstract

Instrument Science Report WFC3 2010-09, 26 pages

Physics

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

Scientific paper

In this report we describe different dithering strategies for WFC3. This includes moving the telescope by steps large enough to step over detector artifacts and the use of sub- integer pixel steps to recover some of the spatial information lost due to the under- sampling of the point spread function by both WFC3 detectors. For both the UVIS and IR channels, we describe the different detector characteristics that have to be taken into account in order to derive an optimal dithering strategy. A number of dither patterns for different scenarios are presented.

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