SIMBAD references

We present V and I photometry of the globular clusters Terzan 9 and NGC 6453 for the first time, and also of NGC 6139. The three clusters are projected towards the bulge. The Colour-Magnitude Diagram morphologies reveal that the sample clusters have blue horizontal branches. This characterizes an important fraction of the clusters projected on the bulge, with implications on the early Galaxy history. From the colour-magnitude diagrams we derive reddenings of E(B-V)=1.95, 0.77, 0.70 and distances d_☉≃4.9, 9.4, 8.5 kpc respectively for Terzan 9, NGC 6139 and NGC 6453. We conclude that these metal-poor clusters are within the bulge volume.