HST color-magnitude diagrams of 74 galactic globular
clusters in the HST F439W and F555W bands

G. Piotto¹, I.R. King², S.G. Djorgovski³,
C. Sosin², M. Zoccali⁴, I. Saviane⁵, F. De Angeli^1,2, M. Riello^1,6, A. Recio Blanco¹,
R. M. Rich⁷, G. Meylan⁸, A. Renzini⁴

Abstract:

We present the complete photometric database and the color-magnitude diagrams for 74 Galactic globular clusters observed with the HST/WFPC2 camera in the F439W and F555W bands. A detailed discussion of the various reduction steps is also presented, and of the procedures to transform instrumental magnitudes into both the HST F439W and F555W flight system and the standard Johnson B and V systems. We also describe the artificial star experiments which have been performed to derive the star count completeness in all the relevant branches of the color magnitude diagram. The entire photometric database and the completeness function will be made available on the Web immediately after the publication of the present paper.

A T T E N T I O N

Please acknowledge the use of this database in any published work you derive from it. The proper reference to the literature is the paper Piotto et al. (2002, A&A, 391, 945). which fully describes the data reduction and calibration procedures.

• Download the paper in gzipped poscript version.
• Observed clusters (program id, exposure times).
• Main parameters of observed clusters.
• Download the photometry files.