C J0907-372 (Pyxis) : a new distant galactic globular cluster.
DA COSTA G.S.
Abstract (from CDS):
The prime focus camera of the Anglo-Australian Telescope has been used to image the object listed by Weinberger (PASP, 107, 58 ) as a possible distant star cluster or dwarf spheroidal galaxy. The CCD data reveal this object to be a distant globular cluster of low central concentration. In particular, the color-magnitude diagram for the cluster core shows a sparse giant branch, a prominent red horizontal branch at R=18.75 and a main sequence turnoff near the limit of the data at R=22.0. A population of possible blue stragglers is also evident. Based on comparisons with the giant branches of standard globular clusters, the reddening to this cluster, designated C J0907-372 (Pyxis), is estimated to be 0.25 ≤ E(B-V) ≤ 0.40. The cluster is then approximately 35 kpc from the Sun and 37 kpc from the galactic center. With a core radius of ∼14 pc, an estimated absolute magnitude M_V=-5.7 and a dominant red horizontal branch, C J0907-372 (Pyxis) has very similar properties to the other low luminosity globular clusters of the outer galactic halo.
[D95] NNNN N=96 among (Nos 162-2097)