Variations of the ultraviolet spectrum of 3C 273 - 9 years of IUE data

Details Variations of the ultraviolet spectrum of 3C 273 - 9 years of IUE data Variations of the ultraviolet spectrum of 3C 273 - 9 years of IUE data

Oct 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...204...21u&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 204, no. 1-2, Oct. 1988, p. 21-27.

Astronomy and Astrophysics

Astrophysics

26

Accretion Disks, Iue, Light Curve, Quasars, Lyman Alpha Radiation, Ultraviolet Spectra, Visible Spectrum

Scientific paper

The quasar 3C 273 has been observed with the IUE satellite in the range 1200 - 3000 Å every two weeks from 29 November 1986 to 18 February 1987, with additional observations in May 1986 and 1 June and 17 July 1987. These recent observations are analyzed together with the archived IUE spectra from 1978 to 1985. The flux at 1275 Å undergoes variations by a factor ≡2 on time scales of a few months. The authors interpret the changes of the UV continuum spectrum in terms of variable contributions of optically thick thermal components.

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