TITLE: GCN CIRCULAR NUMBER: 6142 SUBJECT: GRB 070224: optical afterglow candidate DATE: 07/02/25 05:02:38 GMT FROM: Christina Thoene at Niels Bohr Institute,DARK Cosmo Ctr Christina C. Thoene (DARK), D. Alexander Kann (TLS Tautenburg) and Thomas Augusteijn (NOT) report: We observed the field of GRB 070224 (GCN 6137) with NOT and StanCAM in R and I filters starting 4.35h after the burst. In 3x300s stacked images, we detect a faint object in both R and I close to the XRT error circle at RA = 11:56:06.68 Dec = -13:19:47.6 (J2000) with conservative errors of 1". This is about 5 arcseconds from the refined XRT error circle center (GCN 6143). We propose this object to be the optical afterglow of GRB 070224. At the moment, we cannot confirm if the object is fading or not. Further observations are planned.