Joel Stebbins used the selenium cell photometer to study the known variable star Algol. The improved accuracy of the photometer revealed the second minimum and the limb darkening.
Creator
Astrophysical Journal
Source
Stebbins, Joel. (1910) The measurement of the light of stars with a selenium photometer, with an application to the variations of Algol. Astrophysical Journal, 32, 185-214.
Publisher
http://adsabs.harvard.edu/abs/1910ApJ....32..185S
Date
1910
Language
English
Type
document
Coverage
University of Illinois Observatory, Urbana, Illinois