TITLE: GCN CIRCULAR NUMBER: 7850 SUBJECT: GRB 080607 - PAIRITEL NIR detection DATE: 08/06/07 07:53:03 GMT FROM: Adam Miller at UC Berkeley A. A. Miller, J. S. Bloom, D. A. Perley (UC Berkeley), D. Starr (UCB, LCOGT) report: We observed the optical afterglow of GRB 080607 (Mangano et al., GCN 7847, Rujopakarn et al., GCN 7846) with the 1.3m Peters Automated Infrared Imaging Telescope (PAIRITEL). Observations began at 06:08:44 Jun 07, 2008 UT. We detect the afterglow in a 612 sec mosaic of 7.8 sec simultaneous exposures in the J, H, and Ks filters. Preliminary photometry for the afterglow in exposures beginning on 06:10:32 Jun 07, 2008 UT yields J = 17.1 +- 0.1, H = 15.3 +- 0.1, and Ks = 13.7 +- 0.1, calibrated to the 2MASS system.