Color dependent SBC Flats

Details Color dependent SBC Flats Color dependent SBC Flats

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006hst..prop11055p&link_type=abstract

HST Proposal ID #11055. Cycle 15

Physics

Scientific paper

The primary purpose of this program is to check if the low order flat field of the SBC detector for very red objects is significantly different from the low order flat field determined from observations of hot horizontal branch stars. The SBC has recently been discovered to have a much larger red leak than pre-launch estimates had indicated, and it is possible that this red leak varies with position on the detector. Saturn will be used to produce a flat field image suitable for very red objects and to measure the spatial variation of the red leak. Examination of STIS G140L spectra of Saturn shows that the continuum flux from the disk cuts off sharply below about 1550 angstroms. The filter combination which will best isolate the continuum UV flux of the disk is the F150LP minus the F165LP. Dithered images in these two filters will be used to measure the low order flat field as a function of wavelength.

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