TITLE: GCN CIRCULAR NUMBER: 41007 SUBJECT: GRB 250706B: REM optical observations DATE: 25/07/07 10:23:35 GMT FROM: Riccardo Brivio at INAF-OAB <riccardo.brivio@inaf.it> R. Brivio, M. Ferro, P. D'Avanzo, S. Covino, D. Fugazza (INAF-OAB) report on behalf of the REM team: We observed the field of GRB 250706B detected by SVOM/ECLAIRs (Palmerio et al., GCN 40989) with the REM 60 cm robotic telescope located at the ESO observatory of La Silla (Chile). The observations were carried in the g, r, i, and z bands, started on 2025 July 07 at 05:14:01 UT (i.e. 12.1 hr after the burst), and lasted for about 1 hour. From preliminary inspection, we do not detect any counterpart at the position of the optical afterglow (Zhu et al., GCN 40991; Romanov, GCN 40995) down to the following 3sigma limit: r > 19.2 (AB; calibrated against the SkyMapper catalogue), at a mid-time of 13.0 hr after the trigger. View this GCN Circular online at https://gcn.nasa.gov/circulars/41007. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...