GCN Circular 14074
A. N. Morgan (UC Berkeley) reports: We observed the field of GRB 121212A (Grupe et al., GCN 14064) with the 1.3m PAIRITEL located at Mt. Hopkins, Arizona. Observations began at 2012-Dec-12 09h50m10s UT, ~2.9 hours after the Swift trigger. In mosaics (effective exposure time of 1.96 h) taken simultaneously in the J, H, and Ks filters, we do not detect any source at the afterglow location (Kuin et al., GCN 14069; Perley and Horesh, GCN 14070; Elenin et al., GCN 14071; Cenko, GCN 14072). post burst t_mid (hr) exp.(hr) filt U. Limit (3 sig). 4.79 1.96 J > 19.0 4.79 1.96 H > 17.9 4.79 1.96 Ks > 17.1 All magnitudes are given in the Vega system, calibrated to 2MASS. No correction for Galactic extinction has been made to the above reported values.