WFC3 SMOV Program 11798: UVIS PSF Core Modulation

Details WFC3 SMOV Program 11798: UVIS PSF Core Modulation WFC3 SMOV Program 11798: UVIS PSF Core Modulation

Nov 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009wfc..rept...20s&link_type=abstract

Instrument Science Report WFC3 2009-20, 9 pages

Physics

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

Scientific paper

The image quality analysis carried out during the third thermal-vacuum campaign (TV3) revealed that vibrations of the UVIS shutter cause changes in the width and in the central pixel flux of point sources in short exposures. During the Servicing Mission Observatory Verification (May-August 2009) we observed the flux standard star GD153 with a series of 0.5 sec, 1.0 sec, 3.0 sec, 10.0 sec and 20.0 sec exposures to investigate the impact of the shutter vibration on data acquired in orbit. Our analysis shows that in the very short exposures (<3.0-10.0 sec) the PSF is significantly degraded, but that the flux is preserved.

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