GCN Circular 12729
T. Sakamoto (UMBC/GSFC), D. Donato (ORAU/GSFC), N. Gehrels (GSFC), T. Okajima (GSFC), Y. Urata (NCU) We observed the field of GRB 111225A detected by Swift (trigger #510341; Siegel et al., GCN Circ. 12720) with the 14-inch Goddard Robotic Telescope (GRT) located at the Goddard Geophysical and Astronomical Observatory (http://cddisa.gsfc.nasa.gov/ggao/). A total 20 images of 60 sec (10 images), 180 sec (5 images) and 300 sec (5 images) exposures were taken in the R filter starting from December 25 03:52:12 (UT) about 94 seconds after the trigger (50 seconds after the BAT position notice) and stopped on December 25 04:43:53 (UT). We do not detect the optical afterglow both in the individual images and the stacked image inside the enhanced XRT position (Evans et al., GCN #12724). The estimated upper limit of the combined image (total exposure of 3000 sec) is ~18.5 mag using the USNO-B1 catalog.