Science Requirements for Limits on Vent Tube Stray Light

Details Science Requirements for Limits on Vent Tube Stray Light Science Requirements for Limits on Vent Tube Stray Light

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007wfc..rept...29p&link_type=abstract

Instrument Science Report WFC3-ISR-2007-29, 12 pages

Physics

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

Scientific paper

The design of the WFC3 UVIS and IR detector vent tubes is intended to assure that the stray light on the science detectors from illumination by the bright Earth at the vent tube radiator openings is greatly attenuated. The limits on that stray light and the nominal attenuation required in order that the scientific quality of images is not significantly degraded are presented here. The stray light signal rate in the UVIS detector should be less than 5.0 electrons/sec/cm2, and less than 75 electrons/sec/cm2 for the IR detector. In order to meet these limits, the incident flux of the bright Earth on the vent tube opening must be attenuated at the detector by greater than 2×10^16 in the UVIS channel and 3-10^15 in the IR channel.

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