announced that a black hole of some 2,200 solar masses may be located in the cluster; the researchers detected the black hole's signature from the motions and distributions of pulsars in the cluster. However, a recent analysis of an updated and more extensive timing data set on these pulsars provides no solid evidence in favor of the existence of a black hole. Modern discoveries In December 2008, Ragbir Bhathal of the University of Western Sydney claimed the detection of a strong laser-like signal from the direction of 47 Tucanae. In May 2015, the first evidence of the process of mass segregation in this globular cluster was announced. The cluster's Hertzsprung–Russell diagram suggests stars approximately 13 billion years old, which is unusually old. References External links 47 Tucanae at the ESA-Hubble website 47 Tucanae, Galactic Globular Clusters Database page 47 Tucanae at the Chandra X-ray Observatory website NGC 104 The Toucan's Diamond ESO Globular clusters Tucana (constellation) Tucanae, Xi Xi Tucanae 106b 17510914 Articles containing video clips 0095 002051 Intermediate-mass black holes