Correlated X-ray and millimetre variability of the blazar 3C 273

McHardy, I. M., Papadakis, I., Leach, C. M., Robson, E. I., Junor, W., Staubert, R., Steppe, H. and Gear, Walter Kieran ORCID: https://orcid.org/0000-0001-6789-6196 1994. Correlated X-ray and millimetre variability of the blazar 3C 273. Presented at: Multi-wavelength continuum emission of AGN: 159th Symposium of the International Astronomical Union, Geneva, Switzerland, 30 August -3 September , 1993. Published in: Courvoisier, T.J.-L. and Blécha, A. eds. Multi-wavelength continuum emission of AGN: proceedings of the 159th Symposium of the International Astronomical Union, held in Geneva, Switzerland, August 30-September 3, 1993. International Astronomical Union (IAU) symposium (159) Kluwer Academic Publishers, pp. 193-196.

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Abstract

The authors present the results of X-ray and millimetre monitoring of the blazar 3C 273 at 1-2 day intervals over the period 12 December 1992 to 24 January 1993. No large flares are seen in this period but variations in both wavebands of ≡30% on few day timescales are apparent. The ROSAT PSPC X-ray spectrum consists of 2 power-law components with the harder component dominating above 0.5 keV. There is very little correlation between the variability of the soft and hard components. The results show that the hard X-ray component cannot be a simple extrapolation of the millimetre/IR synchrotron component but may be explained as a self-Compton component in a shocked jet.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Publisher:	Kluwer Academic Publishers
ISBN:	9780792327448
Related URLs:	Publisher
Last Modified:	27 Oct 2022 09:55
URI:	https://orca.cardiff.ac.uk/id/eprint/68218

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