STScI Logo

Hubble Space Telescope
GHRS Instrument Science Report 040

GHRS Instrument Science Report 040

"Predicting GHRS Target Acquisition Count Rates"  7/92

Stephen J. Hulbert, Lisa E. Walter, and Ronald L. Gilliland

Abstract excerpted from the report:

GHRS target acquisition count rates for the spectra of the 175 stars contained
in the Bruzual-Persson-Gunn-Stryker (BPGS) Library of Stellar Spectra have 
been calculated using CALCPHOT, a task in the SYNPHOT package in STSDAS, GHRS
target acquisition count rates for objects similar to those in the BPGS 
catalog can be predicted by following the procedures described in this report.
Table 1, which contains the predicted count rates, is intended to replace the
Table 4-2 found on page 23 of V.3.0 of the GHRS Instrument Handbook.  
Constraints on the value of STEP-TIME are discussed.