Computer Science
Scientific paper
Sep 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006wfc..rept....4b&link_type=abstract
Instrument Science Report WFC3 2006-04, 6 pages
Computer Science
Hubble Space Telescope, Hst, Space Telescope Science Institute, Wide Field Camera 3, Wfc3, Ir Channel
Scientific paper
The filter set of the WFC3 IR channel has until now included a filter with significant transmission in the optical, the F093W. The bandpass provided by that filter will extend well below 800 nm when the current IR flight detector (FPA64) is replaced by one with its substrate removed. The F093W filter was intended to allow alignment of the IR channel using an optical laser, but it has also been considered as a potential filter for science. Because the IR channel can now be aligned with an infrared laser, we revisit in this report the utility of the F093W filter for scientific observations. The science that can be performed with the F093W could in general be pursued with the F098M filter on the IR channel or one of the red filters on the UVIS channel, such as the F600LP. Thus, because the primary impetus for the F093W is gone, we are removing it and restoring the F140W filter, which was itself replaced by the F110W in 2002. The F140W filter provides an excellent complement to the F105W filter, straddles a gap in ground-based coverage (due to strong atmospheric absorption between J and H) and extant WFC3 filter coverage, and provides a useful direct image for the G141 grism.
Baggett Sylvia
Brown Thomas M.
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