WFC3 SMOV Programs 11437/9: IR On-orbit PSF Evaluation

Details WFC3 SMOV Programs 11437/9: IR On-orbit PSF Evaluation WFC3 SMOV Programs 11437/9: IR On-orbit PSF Evaluation

Nov 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009wfc..rept...37h&link_type=abstract

Instrument Science Report WFC3 2009-37, 12 pages

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

Scientific paper

We have assessed the image quality of the WFC3 IR channel on orbit, following its alignment to the HST OTA. Point spread function measurements of ~130 stars over the field were made in the F098M, F105W and F160W and compared to model computations and CEI specifications. Deep, core-saturated images of a standard star, sampling the field at 5 locations, were also obtained to evaluate the PSF wings. All encircled energy specifications are met or exceeded, with exception of the inner core EE at 160 nm, as expected from previous ground testing and modeling results. The optical model has been correlated to the observed PSF properties and may be used to predict performance over the full IR spectral range.

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