TITLE: GCN CIRCULAR NUMBER: 9628 SUBJECT: GRB 090709: PAIRITEL NIR Upper Limits DATE: 09/07/09 08:58:46 GMT FROM: Adam Morgan at U.C. Berkeley A. N. Morgan, C. R. Klein, D. A. Perley, J. S. Bloom, (UC Berkeley), report: We observed the field of GRB 090709 (Morris et al., GCN 9625) with the 1.3m PAIRITEL located at Mt. Hopkins, Arizona. Observations began at 2009-07-09 07:40:22 UT, ~108 seconds after the Swift trigger. In preliminary mosaics (effective exposure time of ~374 seconds) taken simultaneously in the J, H, and Ks filters, we detect no source at the XRT position. The preliminary photometry yields: post_burst t_mid(s) exp(s) filt U. Limit (3 sig) 438 374 J > 17.7 438 374 H > 16.9 438 374 Ks > 15.3 All magnitudes given in the Vega system, calibrated to 2MASS. No correction for Galactic extinction has been made to the above reported values. Observations are ongoing. [GCN OPS NOTE(09jul09): Per author's request, in the Subject line the "090609" was changed to "090709".]