Further evidence for the disputed constancy of the photometric standard 109 Virginis

Astronomy and Astrophysics – Astronomy

Scientific paper

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Binary Stars, Reference Stars, Stellar Spectrophotometry, Stellar Luminosity, Ultraviolet Astronomy

Scientific paper

Results are presented from observations of 109 Vir made in the y filter
of the uvby system between 1984 and 1988. The results suggest that there
is no evidence for variablity of 109 Vir or 108 Vir. It is noted that,
although these two stars are constant, microvariability at a level less
than 1 percent is common among F, G, and K stars.

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