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Title:
The unusual ultraviolet variability of the QSO 3C 232
Authors:
Bruhweiler, F. C.; Kafatos, M.; Sofia, U. J.
Affiliation:
AA(Catholic University of America, Washington, DC), AB(George Mason University, Fairfax, VA), AC(Magruder High School, Rockville, MD)
Publication:
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 303, April 15, 1986, p. L31-L35. (ApJL Homepage)
Publication Date:
04/1986
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Astronomical Spectroscopy, Quasars, Ultraviolet Astronomy, Continuous Spectra, Iue, Lyman Alpha Radiation, Spectrum Analysis
DOI:
10.1086/184647
Bibliographic Code:
1986ApJ...303L..31B

Abstract

After examining ultraviolet IUE spectra of 18 QSOs with z greater than 0.35, it is found that one object, 3C 232 (z = 0.533), stands out as exhibiting higly unusual spectral and continuum variability. The H I-Ly-alpha shows at a factor of two decrease in a day. The magnitude of the UV continuum variability is reminiscent of that seen in the optically violent variables at visual wavelengths. Several spectral features at wavelengths shortward of H I-Ly-alpha in the rest frame are identified. A brief discussion comparing the spectrum of 3C 232 with those of other QSOs in our IUE sample at wavelengths shortward of 1216 A is also presented.

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