GCN Circular 13232
B. E. Cobb (GWU) reports: Using the ANDICAM instrument on the 1.3m telescope at CTIO, we obtained optical/IR imaging of the error region of GRB 120404A (GCN 13208, Stratta et al.) with a mid-exposure time of 17.4 hours post-burst (2012-04-05 06:13 UT). Total summed exposure times amounted to 36 minutes in I and 30 minutes in J. No source is detected at the position of the optical afterglow (e.g. GCN 13208, Stratta et al.; GCN 13209, Guidorzi et al.) to approximate limiting magnitudes of I > 21.6 and J > 19.6. Magnitudes are calibrated using USNO-B1.0 stars in I, and 2MASS stars in J.