Physics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...205.4809s&link_type=abstract
American Astronomical Society Meeting 205, #48.09; Bulletin of the American Astronomical Society, Vol. 36, p.1417
Physics
Scientific paper
A number of smaller observatories utilize relatively low-cost, off-the-shelf telescopes and CCD cameras to obtain differential photometric measurements of variable stars. Obtaining the best-possible differential photometric precision, as evidenced by the standard deviations of the comparison-check differentials, is often a vital goal. This series of experiments is investigating, for two different Meade LX-200 telescopes (each equipped with an SBIG ST-7XE camera), the relationship between: (1) autoguiding precision and differential photometric precision, and (2) focus precision and differential photometric precision. The effects of purposefully introducing both autoguiding "errors" (i.e. small telescope movements) and image defocus on differential photometric precision are being evaluated. Telescope time is being provided by the Orion and Dark Ridge Observatories. I acknowledge the assistance of Russell Genet (Orion Observatory), Thomas Smith (Dark Ridge Observatory), and John Mottmann (California Polytechnic State University), as well as the financial support by the Department of Physics, California Polytechnic State University for conference and travel expenses.
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