FOS Instrument Science Report 134

"Cycle 3 FOS Red Side Super-Flats"  1/95

D. Lindler, R. Bohlin, and C. Keyes

Abstract excerpted from the report:

A new set of FOS flat fields are available for correcting pre-COSTAR red side 
single aperture observations.   The flats are computed using the "super-flat" 
technique (Lindler, et al. 1993) on observations of WD0501+527 taken on Nov. 
25 and 26, 1993 (Proposal 5229).  Application of the files to standard star 
observations taken before 1994 indicate that the new flat field files should be 
used for reprocessing single aperture data for gratings H19, H27 and L15 
taken after August 7, 1993, and single aperture data for graings H40, H57, L 
65, and the prism after June 18, 1992.  The 1 to 2 percent ringing seen in the 
results for proposal 2821 from June 1992 is not present in these new results.