Radio to X-ray observations of the quasar 3C 273

Details Radio to X-ray observations of the quasar 3C 273 Radio to X-ray observations of the quasar 3C 273

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986msngr..45...21c&link_type=abstract

ESO Messenger (ISSN 0722-6691), Sept. 1986, v. 45, p. 21,22.

Astronomy and Astrophysics

Astronomy

1

Quasars, Radio Astronomy, X Ray Astronomy, Continuous Spectra, Infrared Radiation, Ultraviolet Radiation

Scientific paper

A series of repeated multifrequency observations were made of 3C 273 at intervals from radio wavelengths to X-rays. The data were collected with the EXOSAT and IUE spacecraft and with telescopes at three ground-based sites. The measurements were repeated to offset uncertainties due to large short-term spectral variations. Variations observed at near-IR intervals demonstrated that near-IR radiation does not arise from the same source as observed far-IR radiation, i.e., synchrotron emissions. The X-ray emitting source was projected to be a light month across, while UV radiation originated from a source as large as that emitting visible light. Finally, the far-IR source was smaller than a few light months across.

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