GCN Circular 13055
N. R. Tanvir (U. Leicester), O. Hartoog (U. Amsterdam), and T. Schrabback (U. Bonn) report on behalf of a larger collaboration: We imaged the field of GRB120312A (Stamatikos et al. GCN13049) using the WHT/ACAM beginning 05:15 UT on March 13th (approximately 13 hours post-burst). A 24 minute integration was obtained in the z-band. �� Within the refined XRT error circle (Mangano et al. GCN13053) we find a source at position: RA(2000) = 16 47 09.23 dec(2000)= +23 51 28.9 The source may be slightly extended, although the S/N is too poor to determine this with confidence.�� Its provisional magnitude is z~23.8 +/- 0.2 calibrated against nearby SDSS DR8 stars.