TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3809 SUBJECT: GRB050814: Fading red source DATE: 05/08/15 08:36:17 GMT FROM: Brian Lindgren Jensen at U.of Copenhagen Brian L. Jensen, Johan P. U. Fynbo, Jens Hjorth, Jesper Sollerman, Jos? Mar?a Castro Cer?n, Kristian Pedersen, P?ll Jakobsson, Darach Watson (DARK, NBI), Anna S. Arnadottir (U. of Lund, Sweden), Diana A. Fiuza (U. of Helsinki, Finland) and Jan-Erik Solheim (U. of Oslo, Norway) report: "Using ALFOSC on the Nordic Optical Telescope we have obtained VRI imaging of the field of GRB 050814.485 (Retter et al., GCN#3799) on August 15.1, 2005 UT (~13.5 h after the burst). In the refined XRT error-circle (Morris et al., GCN#3805) we clearly detect the source reported by Bradly Cenko (GCN#3807) in our I- and R-band images, whereas the source is absent in the V-band. Based on preliminary photometry, we obtain for the source : Date (UT) Filter Exptime Seeing Mag Aug 15.04 V 3x300s 1.1" >23.0 Aug 15.06 R 3x300s 1.0" 23.2 Aug 15.07 I 3x300s 0.9" 20.5 Compared to the preliminary I-band detection reported in GCN#3807, the source appears to be fading. The colours of the object, if it is the afterglow of GRB 050814.485, indicate either a high redshift (4.5