TITLE: GCN CIRCULAR NUMBER: 12851 SUBJECT: XRF 120118A: Optical candidate DATE: 12/01/18 14:53:42 GMT FROM: Juan Carlos Tello at IAA-CSIC J.C. Tello (IAA-CSIC), R. Sanchez-Ramirez (IAA-CSIC), J. Gorosabel (IAA-CSIC), A.J. Castro-Tirado (IAA-CSIC), P. Kubanek (CTU Praha), W. Allen (Vintage Lane Obs, New Zealand), Ph. Yock (Auckland Univ.), Kuan-Yu Lin (Auckland Univ.), report on behalf of a larger collaboration: We observed the field of XRF 120118A (Gotz et al., GCNC 12849), detected by INTEGRAL, with the 0.6m Yock-Allen telescope at the BOOTES-3 station in Blenheim (New Zealand). Unfiltered images were obtained starting on 09:21:00 UT (03h16m after the burst, limited by setting of the Sun) and were combined in two sets of 53x60s of exposure each. We detect a fading source at RA(J2000): 13:01:22.72 (195.344 [degrees]) DEC(J2000): -61:39:23.20 (-61.656 [degrees]) In the first set with a mean observation time of 09:31:06 UT we observe a magnitude of 18.60 (calibrated against USNO-B1 R2 filter). Roughly an hour later it's decayed more than 2 magnitudes. This source is well within the INTEGRAL 2.7 arcmin 90% c.l. and is not observed in catalog USNO-B1 Spectroscopic observations are encouraged. This message may be cited.