TITLE: GCN CIRCULAR NUMBER: 12871 SUBJECT: GRB 120119A: optical observations DATE: 12/01/19 12:57:41 GMT FROM: Alexei Pozanenko at IKI, Moscow L. Elenin (KIAM), A. Volnova (SAI MSU), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of the Swift GRB 120119A (Beardmore et al., GCN 12859) with 0.45-m telescope ISON-NM observatory on Jan. 19. We took several unfiltered images of 60 s exposure on Jan.19, starting (UT) 05:19:52. We clearly detect the OT source (Beardmore et al., GCN 12859). Coordinates of the source are (J2000) 08 00 06.96 -09 04 54.4 which is consistent with UVOT position (GCN 12859). Photometry of the source is based on SDSS star J080000.59-090624.3 (08:00:00.60 -09:06:24.4) assuming R=16.42: t-t0 filter Exp. OT (mid, days) (s) 0.05234 none 600 18.97 +/- 0.09 0.06039 none 600 18.84 +/- 0.08 0.06837 none 600 19.13 +/- 0.11 0.08321 none 1500 19.51 +/- 0.07 0.10178 none 1500 19.70 +/- 0.08 0.12128 none 1500 19.99 +/- 0.08 0.13989 none 1500 19.86 +/- 0.08 Looking for the photometry result one can suggest either plateau phase or the start of a re-brightening episode at ~ 0.14d.