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Simultaneous observations of active galactic nuclei with IUEThe IUE observations of four active nuclei were coordinated with radio, infrared, and X-ray measurements to obtain simultaneous determinations of their continuous spectra. The results for the BL Lac objects 0735+178 and I Zw 187 indicate sufficient UV and X-ray fluxes to ionize any gas. Comparison of the X-ray measurements with the extrapolated optical UV continuum show a definite X-ray excess for I Zw 187 but none for the other BL Lac object.
Document ID
19810017441
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Bregman, J. N. (New York Univ. New York, NY, United States)
Glassgold, A. E. (New York Univ. New York, NY, United States)
Huggins, P. J. (New York Univ. New York, NY, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1981
Publication Information
Publication: NASA. Goddard Space Flight Center The Universe at Ultraviolet Wavelengths: The First Two Yrs. of Intern. Ultraviolet Explorer
Subject Category
Astrophysics
Accession Number
81N25977
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19810017357Collected WorksThe Universe at Ultraviolet Wavelengths: The first two years of International Ultraviolet Explorer19810017357Collected WorksThe Universe at Ultraviolet Wavelengths: The first two years of International Ultraviolet Explorer
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