TITLE: GCN CIRCULAR NUMBER: 4212 SUBJECT: GRB 051109a: IR Detections DATE: 05/11/09 02:09:23 GMT FROM: Josh Bloom at UC Berkeley J. S. Bloom, on behalf of a larger collaboration, reports: "The Peters Automated Infrared Imaging Telescope (PAIRITEL) autonomously began observing the field of GRB 051109a (Swift trigger 163136) at 2005-11-09 01:13:55.59 UTC (1min35 sec after the trigger). In the first several individual 7.8 second exposures we detected the candidate afterglow proposed by Rykoff et al. (GCN #4211) in simultaneous J, H, and Ks imaging. Further observations are in progress as well as analysis." Josh