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A Technique for Ultrahigh‐Precision CCD Photometry

Mark E. Everett and Steve B. Howell
Publications of the Astronomical Society of the Pacific
Vol. 113, No. 789 (November 2001), pp. 1428-1435
DOI: 10.1086/323387
Stable URL: http://www.jstor.org/stable/10.1086/323387
Page Count: 8
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A Technique for Ultrahigh‐Precision CCD Photometry
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Abstract

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 ( \documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \usepackage[OT2,OT1]{fontenc} \newcommand\cyr{ \renewcommand\rmdefault{wncyr} \renewcommand\sfdefault{wncyss} \renewcommand\encodingdefault{OT2} \normalfont \selectfont} \DeclareTextFontCommand{\textcyr}{\cyr} \pagestyle{empty} \DeclareMathSizes{10}{9}{7}{6} \begin{document} \landscape $V\sim 14$ \end{document} ). 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.

Notes and References

This item contains 28 references.

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