VizieR Online Data Catalog RRLs in globulars. IV. UBVRI photometry in Omega Cen (Braga+, 2016)

We provide new, accurate, and homogeneous calibrated multi-band UBVRI photometry for the candidate RR Lyrae (RRLs) in omega Cen. We acquired 8202 optical CCD images of omega Cen that cover a time interval of 24 years (1988 Feb-2012 Feb) and a sky area of 84*48arcmin across the cluster center. The bulk of these images were collected with the Danish 1.5m telescope at ESO La Silla as time-series data in three main long runs (more than 4500 images). The others were collected with several telescopes available at Cerro Tololo Inter-American Observatory (CTIO) 0.9m, 1.5m, Blanco 4m, at European Southern Observatory (ESO) 0.9m, MPI/ESO 2.2m, New Technology Telescope (NTT), Very Large Telescope (VLT), and at South African Astronomical Observatory (SAAO; 1m). (4 data files).