First-Order Test of WFC3/IR Imaging: from Phase 2 Proposal to MultiDrizzle Product

Details First-Order Test of WFC3/IR Imaging: from Phase 2 Proposal to MultiDrizzle Product First-Order Test of WFC3/IR Imaging: from Phase 2 Proposal to MultiDrizzle Product

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009nicm.rept...11d&link_type=abstract

WFC3 Instrument Science Report 2009-11, 10 pages

Computer Science

Performance

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

Scientific paper

We have run MultiDrizzle on a synthetically generated set of WFC3/IR central subarray images using headers produced and processed as they will be in on-orbit observations. The images consist of a few "stars" (point spread functions) which are dithered in a box pattern. We have measured the positions of the stars in the aligned distortioncorrected images by fitting a Gaussian to smoothed one-dimensional profiles along rows and columns, and show the accuracy of this method. We use the dispersion in the measured coordinates of each star as a first-order test of the end-to-end performance of the systems that specify target positioning and correct the images for geometric distortion.

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