TITLE: GCN CIRCULAR NUMBER: 14333 SUBJECT: GRB 130327A: PAIRITEL NIR Afterglow Candidate DATE: 13/03/27 03:39:24 GMT FROM: Adam Morgan at U.C. Berkeley A. N. Morgan (UC Berkeley) reports: We observed the field of GRB 130327A (Ukwatta et al., GCN 14331) with the 1.3m PAIRITEL located at Mt. Hopkins, Arizona. Observations began at 2013-Mar-27 02h21m22s UT, ~33.8 minutes after the Swift trigger. In mosaics (effective exposure time of ~25 m) taken simultaneously in the J, H, and Ks filters, we marginally detect a source in the J band within the XRT error circle (Ukwatta et al., GCN 14331). Given the minor significance of the detection in only a single filter, deeper observations are encouraged to confirm if this possible source is indeed the afterglow of GRB 130327A. post burst t_mid (hr) exp.(hr) filt Mag 0.91 0.42 J 17.8 +/- 0.4 0.91 0.42 H > 17.1 0.91 0.42 Ks > 15.7 All magnitudes are given in the Vega system, calibrated to 2MASS. No correction for Galactic extinction has been made to the above reported values. Observations are ongoing.