TITLE: GCN CIRCULAR NUMBER: 5598 SUBJECT: GRB 060923C: Keck Observations DATE: 06/09/23 18:20:56 GMT FROM: Derek Fox at PSU A. Rau (Caltech), E.O. Ofek (Caltech) and D.B. Fox (Penn State) report on behalf of a larger collaboration: We imaged the position of GRB060923C (Stamatikos et al., GCN 5591) on UT 2006 Sep 23.58 (30 minutes post trigger) with the Low Resolution Imager and Spectrograph at Keck-I. Observations were performed at high airmass (3.1). Within the XRT error circle, we detect a single point-like object, with I~21 mag, at coordinates: R.A. 23:04:28.4, Dec. +03:55:29 (J2000) We note that this source is marginally detected in the Palomar Optical Sky Survey (DSS) at a similar brightness.