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astro-ph1999
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…
astro-ph1999
The light curves of the short-period variable stars in Omega Centauri
Ennio Poretti
The Fourier decomposition was applied to the light curves of the short period variable stars discovered by the OGLE team in Omega Cen. The phi_21 parameters are confined in a narro…