I. Intensive Optical Monitoring of the BL Lac object PKS 2155-304: the July 1998 campaign. II. Optical Polarization of PKS 2155-304

A. Treves, E. Pian, F. Scaltriti +3

In this contribution two papers on the BL Lac object PKS 2155-304 are presented. They are based on our program of systematic intensive optical monitoring in search of fast variabil…