NTT V, I, z photometry of the metal-rich bulge globular cluster Terzan 6 ^*

¹ Universidade de São Paulo, CP 9638, São Paulo 01065-970, Brazil
² Università di Padova, Dept. di Astronomia, Vicolo dell'Osservatorio 5, I-35123 Padova, Italy
³ Universidade Federal do Rio Grande do Sul, Dept. de Astronomia, CP 15051, Porto Alegre 91500-970, Brazil

Received: 28 June 1996
Accepted: 21 August 1996

Abstract

We present for the first time optical (V, I and Gunn z) colour magnitude diagrams for Terzan 6, which were collected under excellent seeing conditions with the ESO NTT telescope. The horizontal branch morphology is red, nearly superimposed on the red giant branch. The red giant branch morphology presents characteristics intermediate between those of 47 Tuc and NGC 6528/NGC 6553. We derive a reddening of and a distance kpc (assuming ). We conclude that Terzan 6 belongs to the metal-rich bulge globular cluster system.