AGN Statistics of Simultaneous Radio and Gamma Ray Observations

In this paper we present first results of a statistical analysis of correlated variability behaviour of flat-spectrum radio quasars (FSRQ) on the basis of EGRET data and cm-wavelength monitoring data. We use EGRET observations obtained between April 1991 to September 1993 and multifrequency radio observations at 2.8cm, 6cm and 11cm taken with the 100-m-Effelsberg Telescope parallel to the CGRO observations. In the following discussion the observed FSRQ which have not been detected by EGRET yet, are referred to as ‘candidates’ in contrast to the detected ones, called ‘EGRET-sources’. The methods used in this paper are described in more detail in Mucke et al. (1996).