AAS 204th Meeting, June 2004
Session 6 Stars: Winkin' and Blinkin'
Poster, Monday, May 31, 2004, 9:20am-6:30pm, Ballroom

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[6.03] Times of Maximum Light: The Passband Dependence

M.D. Joner (BYU), C.D. Laney (SAAO)

We present UBVRIJHK light curves for the dwarf Cepheid variable star AD Canis Minoris. These data are part of a larger project to determine absolute magnitudes for this class of stars.

Our figures clearly show changes in the times of maximum light, the amplitude, and the light curve morphology that are dependent on the passband used in the observation. Note that when data from a variety of passbands are used in studies that require a period analysis or that search for small changes in the pulsational period, it is easy to introduce significant systematic errors into the results.

We thank the Brigham Young University Department of Physics and Astronmy for continued support of our research. We also acknowledge the South African Astronomical Observatory for time granted to this project.

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