THE OPTICAL GRAVITATIONAL LENSING EXPERIMENT - VARIABLE-STARS IN GLOBULAR-CLUSTERS .3. RR-LYRAE STARS AND POP-II CEPHEIDS IN OMEGA-CENTAURI

We present V-band photometry for 141 variable stars from the held of o mega Cen. All but one variables are either RR Lyr stars or Pop. II Cep heids. One object is a distant background RR Lyr star from the galacti c halo. The presented sample includes 33 newly identified variables, m ostly low amplitude RR Lyr stars. We identified also two Pop. II Cephe ids with exceptionally low amplitudes of light variations A(V) < 0.2 m ag. The presented data may be used to study period changes of omega Ce n variables and/or for Fourier decomposition of light curves(1).