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A Survey For 0-B Stars in the Puppis Window

Published online by Cambridge University Press:  12 April 2016

David J. Westpfahl Jr.
David J. Westpfahl Jr.*
Affiliation:
Physics Department, Montana State University, Bozeman, MT 59717 U.S.A.

Extract

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In the 1950’s Haro (Haro and Luyten 1962) developed a survey method in which three images, roughly corresponding to U,B, and V, are exposed on one plate. The images are separated by several arc seconds by moving the telescope between exposures. Exposure times are chosen so an unreddened star of spectral type AO to A5 shows three images roughly equal in size and density. The plates are examined by eye to find stars by their colors. A red star shows a strong central image flanked by two weaker images, while a blue star shows a weak central image flanked by two stronger ones. This method allows surveys for stars and galaxies with very red or very blue colors to be carried out with any telescope, and in particular with the Schmidt telescopes at Tonantzintla and at Palomar which were not equipped with objective prisms.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 78: Astronomy with Schmidt-type telescopes , 1984 , pp. 265 - 268
Copyright
Copyright © Reidel 1984

References

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