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Multi-frequency radio spectra of the blazars AO 0235+16 and 3C 454.3

ATEL # 1852; M. Mingaliev, J. Sotnikova and S. Trushkin (SAO RAS)
on 23 Nov 2008; 10:14 UT
Password Certification: Sergei Trushkin (

Subjects: Radio, Millimeter, Gamma Ray, AGN, Quasars

We have measured radio spectra of the blazars AO 0235+16 and 3C454.3 with the RATAN-600 radio telescope during 31 October - 11 November, 2008 at 1, 2.15, 4.8, 7.7, 11.2 and 21.7 GHz. Our data for AO 0235+16 do well (errors are 5-7%) agree with the radio data from ATEL #1849 by Bach et al., really being an extension in the lower frequency band, where spectral index is equal to +0.85 at 1 - 4.8 GHz. The spectrum of the 3C454.3 consists of two power law components crossed at 4.8 GHz: a low-frequency one with the spectral index -0.30, and a high-frequency one with the spectral index +0.20. Obviously, both blazars are in an active state at high frequencies.

The epoch 2008.85 radio spectra of AO0235+16 and 3C454.3

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