GCN Circular 12903
S. B. Cenko (UC Berkeley), E. O. Ofek (Weizmann Institute), and P. E. Nugent (LBNL/UC Berkeley) report on behalf of a larger collaboration: We have imaged the location of the MAXI GRB120127A (Song et al., GCN 12901) with the Palomar 48 inch Oschin Schmidt telescope as part of the Palomar Transient Factory. Observations began at 3:41 UT on 28 January 2012 (~ 23.3 hours after the MAXI trigger) and cover ~ 90% of the MAXI error localization. By comparing sources detected in our images with the USNO-B1 catalog, 2MASS point source catalog, and the Digital Palomar Optical Sky Survey archival images, we find no new sources within the MAXI error localization (aside from a number of known minor planets). The limiting magnitude of our imaging is R >~ 19.5 mag (calculated with respect to field stars from the USNO-B catalog).