TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4756 SUBJECT: GRB060121: optical observations DATE: 06/02/13 15:19:26 GMT FROM: Alexei Pozanenko at IKI, Moscow V. Rumyantsev (CrAO), D. Sharapov (MAO, and NOT La Palma), M. Ibrahimov (MAO), and A. Pozanenko (IKI), on behalf of larger GRB follow up collaboration report: We observed error box of GRB060121 (Arimoto et al., GCN 4550) with 1.5m telescope of Maidanak Astronomical Observatory in R-band on Jan. 23 between (UT) 17:49 and 18:26. Within XRT error circle (Mangano et al., GCN 4560) we do not detect OT (Malesani et al., GCN 4560) and optical source mentioned by Cenko et al., (GCN 4628). Coordinates of the closest to the XRT error circle faint optical source, which is ~7" from the center of the XRT error circle are: RA(J2000) = 09 09 52.18 DEC(J2000) = +45 39 37.4 with uncertainties in both coordinates of 0.3 arcsec. Brightness estimation of the faint source is following: Obs. time, Exp., R (mag), Mag.(UL), Seeing (UT) (s) Jan. 23 17:49-18:26 1800 22.6(+/-0.3) 22.9 1.6" The photometry and astrometry reduction is based on USNO A2.0. The stacked image can de found in http://grb.rssi.ru/GRB060121/