Using global PSF properties to probe the WFC3 UVIS alignment and focus

Details Using global PSF properties to probe the WFC3 UVIS alignment and focus Using global PSF properties to probe the WFC3 UVIS alignment and focus

Aug 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002wfc..rept....4s&link_type=abstract

Instrument Science Report WFC3 2002-04, 10 pages

Physics

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

Scientific paper

This ISR briefly reviews how the WFC3 UVIS channel focus and alignment impact the PSF. The aim is to verify whether we can identify any simple PSF measurement that would allows to monitor these quantities. We find that the centering of the PSF within a pixel is a crucial parameter that needs to be calibrated or corrected for and that PSF sharpness is the most promising parameter.

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