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On zero-point drift in astronomical photoelectric photometry
Published online by Cambridge University Press: 25 April 2016
Extract
In variable star work, the frequent observations of comparison stars during a night often clearly indicate the presence of either changes in extinction or changes of zero point of the photometric system, or both effects simultaneously. In a magnitude — air mass plot, the graph is not linear, but is usually a loop. These loops are well known to observers but so far very little has been published about this problem. Young’s (1974) chapters are perhaps the only exception.
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- Copyright © Astronomical Society of Australia 1978