GCN Circular 5609
Paolo D'Avanzo (INAF-OABr), Stefano Covino (INAF-OABr), Daniele Malesani (SISSA/ISAS), and Gianpiero Tagliaferri (INAF-OABr), report on behalf of the MISTICI collaboration: We imaged again the field of GRB 060923C (Stamatikos et al., GCN 5591) on 2006 Sep 25 from 0:51 to 1:36 UT with the ESO VLT+ISAAC in the J band. Seeing conditions were comparable to our previous observation (Covino et al., GCN 5604). With respect to the first epoch of imaging, we detect sources A and C, with the same brightness. Source B has faded significantly and is barely detectable. Image subtraction performed with ISIS also confirms the fading. We therefore fully confirm the identification by Fox (GCN 5607) of source B as the afterglow of GRB 060923C. We acknowledge support from the ESO observing staff at Paranal. This message may be cited.