A Test of the Use of Hot DA White Dwarfs to Calibrate AB-Magnitude Photometry

Details A Test of the Use of Hot DA White Dwarfs to Calibrate AB-Magnitude Photometry A Test of the Use of Hot DA White Dwarfs to Calibrate AB-Magnitude Photometry

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007noao.prop..228a&link_type=abstract

NOAO Proposal ID #2007B-0228

Physics

Scientific paper

Proposed all-sky surveys wish to have photometry on an energy-based system (AB magnitudes, for instance). Two important projects requiring such photometry are luminosity distances of supernovae and high quality photometric redshifts. In order to achieve sub-1% energy-based photometry, hot DA White Dwarfs (WDs) with spectroscopically determined T_eff and log(g) and model-atmosphere spectral-energy distributions (SEDs) are needed as standards. What is not known is exactly how to use these WDs as standards most correctly. We do not know how quickly in angular distance and time the atmospheric conditions of a program star observation and standard observation, even with extinction applied, become different enough to turn sub-1% photometry into the more normal 1.5-2% standard star solutions typically derived for a night. This knowledge is critical in understanding how many faint standards need to be set up, and in planning a strategy for calibrating a large survey such as LSST.

Affiliated with

Also associated with

No associations

Rating

A Test of the Use of Hot DA White Dwarfs to Calibrate AB-Magnitude Photometry 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 A Test of the Use of Hot DA White Dwarfs to Calibrate AB-Magnitude Photometry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Test of the Use of Hot DA White Dwarfs to Calibrate AB-Magnitude Photometry will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1796895