Re: PASP Paper

[Ron Wickersham <rjw@alembic.com>]

On Fri, 2 Nov 2001, Tom Droege wrote:

> Those interested in what we are doing might look at:
> 
> PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 113: 1428-1435, 
> 2001 November
> © 2001. The Astronomical Society of the Pacific. All rights reserved. 
> Printed in U.S.A.
> 
> A Technique for Ultrahigh-Precision CCD Photometry
> MARK E. EVERETT1 AND STEVE B. HOWELL1
> 
> Astrophysics Group, Planetary Science Institute, 620 North 6th Avenue, 
> Tucson, AZ 85705; everett@psi.edu, howell@psi.edu
> Received 2001 April 17; accepted 2001 July 16

ABSTRACT     We present techniques for wide-field ultrahigh-precision 
time-sampled CCD photometry. Representing a survey of field stars, our 
data consist of UBVRI photometry and a V-band time series of exposures 
on 5 consecutive nights covering 11,500 stars in a 1 deg2 field. The 
resulting light curves reach precisions of 0.0020 mag per exposure in 
the brightest stars (V  14). Light curves binned and averaged over
4.5 hr reach precisions of 0.00019 mag for the brightest stars. We 
present example light curves and discuss one application for surveys 
of this type: the search for transits by extrasolar planets.

-ron