Violent activity in the bright quasar 3C 273.

Details Violent activity in the bright quasar 3C 273. Violent activity in the bright quasar 3C 273.

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988msngr..54...37c&link_type=abstract

The Messenger, vol. 54, p. 37-39

Computer Science

2

Light Curves:Quasars, Quasars:Light Curves

Scientific paper

Observations of the optical variability in the bright quasar 3C 273 date from long before this source has been found to be a quasar. Almost a century of (mostly photographie) data are available (Angione and Smith, 1985) and display variations on many timescales longer than -10 days. In more recent years, a programme of multi-frequency observations of the quasar from the radio domain to the X-rays has been conducted. The first results of this programme have been described in the Messenger No. 45 (September 1986). In summary, we found variations by a factor - 2 in most observable spectral domains. The typical variability timescale was of the order of one month. The different components of the source varied at different epochs, showing little correlation between them. This complex variability pattern allowed to identify distinct components and showed that most of them must be emitted in regions not larger than about one light-month.

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