TITLE: GCN CIRCULAR NUMBER: 11669 SUBJECT: GRB 110206A: Decay of afterglow candidate DATE: 11/02/08 02:50:25 GMT FROM: Jonny Elliott at MPE/GROND J. Elliott, R. Filgas and J. Greiner (all MPE Garching), report on behalf of the GROND team: GROND observed the field of INTEGRAL GRB 110206A (Mereghetti et al., GCN #11654) again starting at 01:10 UT on 2011-02-08, which is 24.62 hours after the first epoch. In total 8 minutes of imaging was obtained simultaneously in g'r'i'z'JHK. The candidate (GCN 11662, Hoversten et al., GCN 11665, Elliott et al. and GCN 11668, Cobb et al.) has been seen to have decayed by 1.2 magnitudes suggesting that it is the afterglow of GRB110206A We measure a preliminary magnitude of the second epoch of r' = 22.4 +/- 0.1 based on the GROND zeropoint.