NICMOS Pupil Transfer Function

Details NICMOS Pupil Transfer Function NICMOS Pupil Transfer Function

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7693c&link_type=abstract

HST Proposal ID #7693

Physics

Hst Proposal Id #7693

Scientific paper

The purpose of this test is to obtain, as a function of camera and wavelength, a two-dimensional surface fit to large-scale flat-fielding residuals expected in standard GO/GTO pointed observations. The large scale illumination pattern obtained from Earth flats is expected to be different from the sky pointed observations, in particular at the edges of the cameras where vignetting have already been detected. The output of this program will be a two-dimensional surface fit that will give the large scale corrections needed to flat-field the images to an accuracy of ~2%. Also, changes in the PSF will be measured as a function of position within the cameras.

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