Disk-Jet Connection in Agns and Microquasars: The Possibility of Thermal
  Flares in the Center
  We discuss the possibility of thermal flares in centers of AGNs and
microquasars. We present preliminary results of an ongoing study trying to
assess the feasibility of a hypothesis suggesting that certain flares observed
in these sources originate in the very centers of the systems and not in the
relativistic jets. Using a simple toy model we reproduce optical flares with
lightcurves very similar to those observed in the sources. The model suits
especially well those cases where only the latter peak of a double-peaked
optical flare has a radio counterpart.
