Physics
Scientific paper
Jul 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001hst..prop.9216s&link_type=abstract
HST Proposal ID #9216
Physics
Hst Proposal Id #9216 Stellar Populations
Scientific paper
Some of the most important projects with the most expensive telescope ever built -- HST -- are hostage to the uncertainty in the absolute calibration of its photometric system. The standard practice in the past has been to calibrate faint objects {e.g. V=26} observed with long exposures using bright stars {e.g. V=13} observed with very short exposures. There is now good evidence that this is the main cause of uncertainty in the absolute photometric accuracy of WFPC2 on HST. We propose to use the Mini-Mosaic Imager on the WIYN telescope to establish faint star photomteric sequences to V=22 in carefully chosen fields that have already been repeatedly observed with WFPC2. This will allow us to retroactively recover the history of the absolute calibration of WFPC2 throughout its mission, and hence improve the available photometric accuracy for all WFPC2 observations. Future HST observations of these fields will allow us to follow WFPC2's absolute calibration to the end of its mission, and may later serve as the basis for calibrating ACS and WFC3. This will greatly reduce the error budgets for a wide variety of fundamental projects {e.g., extragalactic Cepheids and RR Lyrae stars; supernovae; globular-cluster ages; distance and metallicity estimates from colors and magnitudes of red giant branch tips}.
No associations
LandOfFree
Faint Photometric Standard Fields for HST does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Faint Photometric Standard Fields for HST, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Faint Photometric Standard Fields for HST will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1200698