TITLE: GCN CIRCULAR NUMBER: 35624 SUBJECT: GRB 240123A: further SAO RAS optical observations DATE: 24/01/25 05:12:41 GMT FROM: Moskvitin Alexander at SAO RAS <mosk@sao.ru> A. S. Moskvitin, O. A. Maslennikova, O. I. Spiridonova (SAO RAS) report on behalf of the GRB follow-up team. We observed the field of GRB 240123A (D'Ai et al., GCN #35602; Scotton, GCN #35610) with the 1-m telescope of SAO RAS equipped with the CCD photometer. We obtained 16 x 300 sec. images in Rc band on Jan 25, 01:55:52 -- 03:30:49 UT (t_mid - T0 = 1.6511 days). The OT (D'Ai et al., GCN #35602; Pankov et al., GCNs #35605, #35609 #35620; Sasada et al., GCN #35618) is detected in our stacked frame with the brightness of R = 22.0 +/- 0.2. The photometry is based on R2 magnitudes of nearby USNO-B1.0 stars. View this GCN Circular online at https://gcn.nasa.gov/circulars/35624. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...