Bibcode
                                    
                            Kidger, M. R.; Beckman, J. E.
    Bibliographical reference
                                    Structure and evolution of active galactic nuclei, p. 587 - 590
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                        0
            
                        1986
            
  Citations
                                    3
                            Refereed citations
                                    3
                            Description
                                    Extensive monitoring is now available for a good sample of the brighter
quasars and BL Lacs. In some cases, lightcurves are well enough sampled
to permit stochastic modelling. The authors present here, a simple model
of the lightcurve of the prototype BL Lacertae object, BL Lac in terms
of a series of random events, each with rapid rise and exponential
decline. Whilst unable to explain very rapid "optically violent"
activity, it seems to provide a satisfactory fit to the long term trends
in the lightcurve.