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Ultraviolet photometry of globular clustersFilter photometry measurements of the integrated light from several globular clusters between 1500 and 4000 A are discussed. The techniques and problems associated with carrying out photometry of faint extended sources with the OAO-2 instrumentation are described first. The energy distribution for globular clusters determined from these data are corrected for interstellar extinction on the basis of B-V color excesses and a mean ultraviolet extinction curve. The results are compared with synthetic cluster calculations. The ultraviolet energy distribution is primarily determined by the number of stars at the blue end of the horizontal branch.
Document ID
19720024202
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Welch, G. A.
(Wesleyan Univ. Middletown, CT, United States)
Code, A. D.
(Wisconsin Univ. Madison, United States)
Date Acquired
August 6, 2013
Publication Date
January 1, 1972
Publication Information
Publication: NASA, Washington The Sci. Results from the Orbiting Astron. Obs. (OAO-2)
Subject Category
Space Sciences
Accession Number
72N31852
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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