Name of the Speaker(s): Gino Tosti, M. Fiorucci, M. Villata et al
Institution: Astronomical Observatory of Perugia
Title of the communication: Optical Monitoring of the gamma-loud blazar S4 0954+658
Preliminary abstract (12 lines max.): We here present the preliminary results of an intensive BVRI CCD optical monitoring of the gamma-loud blazar S4 0954+658 which was carried out at the Perugia and Torino Astronomical Observatories in the period December 1994-May 1995. During our monitoring the source was very active showing variability with time scale from days to months.Further we detected intranight spectral index variations on February 4/5th 1995 and February 11th 1995.