AAVSO: American Association of Variable Star Observers

Modeling Systematic Differences in Photometry by Different Observers (Abstract)

Volume 45 number 2 (2017)

John C. Martin
University of Illinois Springfield, One University Plaza MS HSB 314, Springfield, IL 62704; Jmart5@uis.edu

Abstract

(Abstract only) Photometric monitoring campaigns commonly increase their cadence and length of coverage by combining measurements from multiple observers (typically using different telescope/detector systems). However, systematic offsets between the calibration of different contributors can cause problems which may threaten to degrade the quality of an effort when analyzing the results. This is particularly common when the collaboration is put together post-hoc after the campaign but it can also be an unwelcome surprise for even the most carefully planned joint efforts. Here we will explore some of the issues and explore solutions which can be helpful for identifying and mitigating systematic offsets between observers during post-hoc analysis.