NGC-6749 - A METAL-POOR HALO GLOBULAR-CLUSTER IN A DISC FIELD RICH INMIRA VARIABLES

We present V,I photometry of the loose star cluster NGC 6749, and for the first time colour-magnitude diagrams are provided. We confirm that it is a globular cluster and its blue horizontal branch indicates tha t it is metal-poor. We derive a reddening of E(B-V) = 1.39 +/- 0.04 an d a distance from the Sun d(circle dot), = 7.3 +/- 0.9 kpc (assuming a total-to-selective absorption R = 3.4). The cluster is projected very close to the Galactic plane, and the derived distance implies a Galac tic coordinate Z approximate to -300 pc. It is thus a halo globular cl uster located close to the disc plane. We also discuss the properties of 78 newly discovered long-period variable stars, of which 75 are Mir as, projected within 1 degrees of the cluster centre. The variables do not appear to be associated with the globular cluster. From their per iods, most of them belong to the metal-rich disc or bulge stellar popu lations.