AAS 205th Meeting, 9-13 January 2005
Session 67 Calibration of Post Space Missions: MSX and SNAP
Poster, Tuesday, January 11, 2005, 9:20am-6:30pm, Exhibit Hall

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[67.03] A Search for Stable Calibration Stars in the SNAP North Field

N. Mostek (Indiana U), S. S. Allam (FNAL), R. C. Bohlin (STScI), S. E. Deustua (AAS), S. M. Kent (FNAL), M. L. Lampton (LBNL), S. L. Mufson (Indiana U), M. Richmond (RIT), J. A. Smith (LANL), D. L. Tucker (FNAL), B. E. Woodgate (NASA GSFC), SNAP Collaboration

The SNAP telescope will rely on a set of stable standard stars within its deep survey to provide relative spectrophotometric calibration in the SNAP filter set. We have conducted a variability survey for such calibration stars within the SNAP North Field using the WIYN 0.9m telescope. Our goal was to discover stars with R-band magnitudes between 16-18 that are variable by less than 0.01 mag. This was accomplished through co-addition of frames and controlling systematics through differential ensemble photometry. Several systematic error issues are considered including large-scale flat fielding error and consitency within differential aperture photometry. We have compiled a list of candidate stable calibration stars and plan spectroscopic confirmation as well as continued monitoring of the SNAP field.

We thank the Office of Science at the Department of Energy for funding of this research.

The author(s) of this abstract have provided an email address for comments about the abstract: nmostek@astro.indiana.edu

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© 2004. The American Astronomical Society.