The unusual ultraviolet variability of the QSO 3C 232

Details The unusual ultraviolet variability of the QSO 3C 232 The unusual ultraviolet variability of the QSO 3C 232

Apr 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...303l..31b&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 303, April 15, 1986, p. L31-L35.

Astronomy and Astrophysics

Astronomy

9

Astronomical Spectroscopy, Quasars, Ultraviolet Astronomy, Continuous Spectra, Iue, Lyman Alpha Radiation, Spectrum Analysis

Scientific paper

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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