CCD PHOTOMETRY OF THE GLOBULAR-CLUSTERS NGC-6496, NGC-6624, AND NGC-6637

This paper presents the data part of work concerning the age, metallic ity, and distance of three globular clusters, which are believed to be long to the disk system of galactic globular clusters, NGC 6496, NGC 6 624, and NGC 6637 (M69). Information is given on: the observations, th e reduction, the photometric calibration. A new photoelectric sequence around NGC 6496 is presented as well. The present data are compared w ith previous work. Finding charts as well as recipes for cross identif ication are given. Lists containing the brighter stars in the cluster regions are added.