GCN Circular 4046
S. Covino, S. Piranomonte, D. Fugazza, F. Fiore, D. Malesani, G. Tagliaferri, G. Chincarini, L. Stella on behalf of the MISTICI collaboration report: We are following the decay of the optical afterglow of GRB 050922C (Norris et al., GCN 4013) with the ESO VLT+FORS1. Multi-band BVR photometry was carried out on September 24 at 00:10 UT, about 1.2 days after the high-energy event. A preliminary calibration, based on Landolt standard stars, have been performed and the OT magnitude in the R band was: R = 21.57 +/- 0.05 confirming the break in the light curve reported by Fynbo et al. (GCN 4040). This message can be quoted.