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Far-ultraviolet studies. II - Galactic-latitude dependence of the 1530 A interstellar radiation fieldA 0.62-sq cm Geiger counter, sensitive between 1425 and 1640 A, was used to map the far-ultraviolet brightness of about half the sky, providing an experimental measurement of the far-ultraviolet interstellar radiation field. At 1530 A, the energy density is approximately 7.4 by 10 to the -17th power erg/cu cm per A. Comparison with integrations of star catalogs calibrated to the ultraviolet shows, as expected, that the bulk of the radiation comes directly from B- and A-type stars. The galactic-latitude dependence of the radiation is analyzed in an unsuccessful attempt to set limits on the absorbing and scattering properties of the interstellar grains in the far-ultraviolet. Excess radiation observed at the galactic pole is probably residual airglow from above the rocket altitude.
Document ID
19770045116
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Henry, R. C.
(Johns Hopkins Univ. Baltimore, MD, United States)
Swandic, J. R.
(Johns Hopkins University Baltimore, Md., United States)
Shulman, S. D.
(Johns Hopkins Univ. Baltimore, MD, United States)
Fritz, G.
(U.S. Navy, E. O. Hulburt Center for Space Research, Washington D.C., United States)
Date Acquired
August 8, 2013
Publication Date
March 15, 1977
Publication Information
Publication: Astrophysical Journal
Subject Category
Astrophysics
Accession Number
77A27968
Funding Number(s)
CONTRACT_GRANT: NGR-21-001-001
Distribution Limits
Public
Copyright
Other

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