Detecting Problematic Observer Offsets in Sparse Photometry

Volume 42 number 1 (2014)

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Tom Calderwood

1184 NW Mt. Washington Drive, Bend, OR 97701; tjc@cantordust.net

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.