Free Access
Astron. Astrophys. Suppl. Ser.
Volume 144, Number 1, May II 2000
Page(s) 5 - 38
Published online 15 May 2000
DOI: 10.1051/aas:2000341

Astron. Astrophys. Suppl. Ser. 144, 5-38

Photometric catalog of nearby globular clusters[*]

I. A large homogeneous (V,I) color-magnitude diagram data-base

A. Rosenberg 1 - G. Piotto 2 - I. Saviane 2 - A. Aparicio 3

Send offprint request: A. Rosenberg:

1 - Telescopio Nazionale Galileo, vicolo dell'Osservatorio 5, I-35122 Padova, Italy
2 - Dipartimento di Astronomia, Univ. di Padova, vicolo dell'Osservatorio 5, I-35122 Padova, Italy
3 - Instituto de Astrofisica de Canarias, Via Lactea, E-38200 La Laguna, Tenerife, Spain

Received July 29, 1999; accepted January 25, 2000


We present the first part of the first large and homogeneous CCD color-magnitude diagram (CMD) data base, comprising 52 nearby Galactic globular clusters (GGC) imaged in the V and I bands using only two telescopes (one for each hemisphere). The observed clusters represent $75\%$ of the known Galactic globulars with $(m-M)_V\leq 16.15$ mag, cover most of the globular cluster metallicity range ( $-2.2 \leq {\rm [Fe/H]}\leq -0.4$), and span Galactocentric distances from $\sim1.2$ to $\sim18.5$ kpc.

In this paper, the CMDs for the 39 GGCs observed in the southern hemisphere are presented. The remaining 13 northern hemisphere clusters of the catalog are presented in a companion paper. For four clusters (NGC 4833, NGC 5986, NGC 6543, and NGC 6638) we present for the first time a CMD from CCD data. The typical CMD span from the $22^{\rm nd}$ V magnitude to the tip of the red giant branch. Based on a large number of standard stars, the absolute photometric calibration is reliable to the $\sim0.02$ mag level in both filters.

This catalog, because of its homogeneity, is expected to represent a useful data base for the measurement of the main absolute and relative parameters characterizing the CMD of GGCs.

Key words: astronomical data base: miscellaneous -- catalogs -- stars: Hertzsprung-Russel (HR) -- stars: population II -- globular clusters: general

SIMBAD Objects

Copyright The European Southern Observatory (ESO)

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.