Transformation of AAVSO Archive Visual Data to the Johnson V System

Volume 31 number 2 (2003)

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Ronald E. Zissell
Williston

Abstract

Comparison star magnitude sequences on older AAVSO charts come from various sources and often differ from magnitudes in the modern V system. Archived variable star data in the AAVSO International Database can be transformed by various algorithms. The transformed observations can be better combined with modern observations.