TITLE: GCN CIRCULAR NUMBER: 45360 SUBJECT: GRB 260808B: SAO RAS optical observations DATE: 26/08/12 11:55:25 GMT FROM: Alexander Moskvitin at SAO RAS <mosk@sao.ru> A. Moskvitin (SAO RAS), O. Spiridonova (SAO RAS), A. Pozanenko (IKI), A. Volnova (IKI), N. Pankov (IKI) report on behalf of GRB follow-up team We observed the field of the GRB 260808B discovered by the SVOM (Bouchet et al., GCN 45316; Brunet et al., GCN 45333), also detected by EP-FXT (Wang et al., GCN 45322) with the Zeiss-1000, SAO RAS 1-m telescope + CCD photometer. The observations were carried out on August 9, 00:11:49--00:38:47 UT. We obtained 5 x 300 sec images in Rc band. The OT (Turpin et al., GCNs 45317; 45318; Li et al. GCN 45320; Adami et al., GCN 45323; Saccardi et al., GCN 45328; Schneider et al., GCN 45329; Bochenek and Perley, GCN 45330; Basa et al., GCN 45341; Burkhonov et al., GCN 45352; Li et al. GCN 45359) is clearly detected in our stacked image. Details of the observation are the following. Date, UTstart, t-T0, Exp., Filter, Mag, Err., UL (mid,d) (n*s) (3-sigma) 2026-08-09 00:11:49 0.41968 5*300 Rc 22.44 +/- 0.13 23.2 This preliminary photometry (Vega) is based on nearby SDSS stars (Lupton 2005 transformation) and not corrected for Galactic extinction. View this GCN Circular online at https://gcn.nasa.gov/circulars/45360. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...