Detecting Problematic Observer Offsets in Sparse Photometry
Tom Calderwood
1184 NW Mt. Washington Drive, Bend, OR 97701
Received January 20, 2014; revised April 15, 2014; accepted April 23, 2014
Abstract
A heuristic method, based upon histogram analysis, is presented for detecting offsets pervasive enough to be symptoms of problematic observing technique or calibration. This method is illustrated by a study of scatter in AAVSO photoelectric photometry (PEP) for five well-observed variable stars.