Name of the Speaker(s): Yuri Y. Kovalev (junior)
Institution: Sternberg Astronomical Institute,
Universitetskij pr. 13,
119899 Moscow,
Russia
Title of the communication:
A STATISTICAL ANALYSIS OF 1995-1996 MULTIFREQUENCY
SPECTRA OBSERVATIONS FOR QUASARS AND BLAZARS
Preliminary abstract (12 lines max.):
There are analyzed the results of up to 5 sets of instantaneous
multifrequency spectra observations at the wavelengths of 31, 13, 7.6, 3.9,
2.7 and 1.4 cm, carried out at the RATAN-600 from August, 1995 to Juny,
1996 for a sample of 170 extragalactic radio sources (blazars and quasars).
The statistical distributions and correlations for the turnover flux,
turnover frequency, spectral width as well as spectral indices in 5
frequency bands are analyzed. Results are similar for the spectra at all
epochs, studied independently. In contrast with the other bands, a strong
decreasing of the spectral indices in the band of 11.1-21.7 GHz with the
flux density at 2.3 GHz is obtained. A correlation between turnover flux
and turnover frequency is absent. Obtained results testify in favor of a
hypothesis on a common physical nature for quasars and BL Lac objects!