Rapid infrared and optical variability in the bright quasar 3C273

Details Rapid infrared and optical variability in the bright quasar 3C273 Rapid infrared and optical variability in the bright quasar 3C273

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988natur.335..330c&link_type=abstract

Nature (ISSN 0028-0836), vol. 335, Sept. 22, 1988, p. 330-333.

Astronomy and Astrophysics

Astronomy

84

Infrared Sources (Astronomy), Quasars, Variability, Infrared Spectra, Luminosity, Magnetic Fields, Visible Spectrum

Scientific paper

Variations by a factor of two were observed by the authors in the IR flux from the bright quasar 3C273 on a timescale as short as one day. Variations of this magnitude over such short periods are unprecedented. In February 1988, the behavior of the source changed from having a stable IR flux and slow optical variations to a state characterized by recurrent IR and optical flaring. The optical variations were of several percent per day, changing from increase to decrease approximately every week. The amplitude of the repeated optical flares was 30-40 percent. The data are consistent with reinjection/acceleration of electrons followed by rapid cooling. The inferred magnetic field is 0.67 Gauss and the data are marginally consistent with no relativistic beaming.

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