Photometric catalog of nearby globular clusters

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Abstract
We present the first part of the first large and homogeneous CCDcolor-magnitude diagram (CMD) data base, comprising 52 nearby Galactic globularclusters (GGC) imaged in the V and I bands using only two telescopes (one foreach hemisphere). The observed clusters represent 750f the known Galacticglobulars with (m-M)v<=16.15 mag, cover most of the globular clustermetallicity range (-2.2 <= [Fe/H] <= -0.4), and span Galactocentric distancesfrom ~1.2 to ~18.5 kpc. In this paper, the CMDs for the 39 GGCs observed in the southern hemisphereare presented. The remaining 13 northern hemisphere clusters of the catalog arepresented in a companion paper. For four clusters (NGC 4833, NGC 5986, NGC6543, and NGC 6638) we present for the first time a CMD from CCD data. Thetypical CMD spans from the 22nd V magnitude to the tip of the red giant branch.Based on a large number of standard stars, the absolute photometric calibrationis reliable to the ~0.02 mag level in both filters. This catalog, because of its homogeneity, is expected to represent a usefuldata base for the measurement of the main absolute and relative parameterscharacterizing the CMD of GGCs
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