Preliminary ACS Sensitivity

Details Preliminary ACS Sensitivity Preliminary ACS Sensitivity

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001hst..prop.9563d&link_type=abstract

HST Proposal ID #9563

Other

Hst Proposal Id #9563

Scientific paper

A spectrophotometric standard star is observed through a popular subset of filters of each camera to assess the sensitivity of the instrument. The star is placed at the centre of the aperture, and two images are taken through each filter. This programme is based on proposal 9020 designed for SMOV. There are three groups of visits, numbered respectively 1 through 3, 4 through 6 and 7 through 9. The three visits in each group must be executed about one month apart from one another, as indicated in the visit requirements. The first visit in each group {namely visits 1, 4 and 7} ought to be scheduled during the month of July 2002. During SMOV the standard star GD71 could be used, which is not visible during the Cycle 11 interim calibration period. We have selected GRW+705824 instead. The latter is a WD slightly brighter than GD71 in V but with very similar spectral properties. The exposure times with this object have been selected to reach, on average, SNR 350 in the central pixel for broad band filters.

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