M4, Messier 4, NGC 6121
Data for this release was taken from HST proposals 5461 and 8679 together with archived observations from HST proposal 8153. The full team involved in this discovery is composed of Brad Hansen (UCLA), Harvey Richer (UBC), Steinn Sigurdsson (Penn State), Ingrid Stairs (UBC) and Stephen Thorsett (UCSC).
F336W (B) 11,800 sec, F555W (V) 15,000 sec, and F814W (I) 4800 sec
NASA and H. Richer (University of British Columbia)