A common cause of errors in CCD differential photometry is an improper calibration of the array. The importance of these errors is evaluated for different cameras with fields between 3 and 30 arcminutes. The usual superflat illumination corrections based on night sky exposures are often found to be unsatisfactory. “Photometric superflats” based on stellar measurements are more reliable and should be used instead. 1.
CITATION STYLE
Manfroid, J., Royer, P., Rauw, G., & Gosset, E. (2001). Correction of Systematic Errors in Differential Photometry. ASP Conference Series, 238, 373–376.
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