TITLE: GCN CIRCULAR NUMBER: 42063 SUBJECT: GRB 251002A: FRAM-ORM afterglow detection DATE: 25/10/02 21:58:23 GMT FROM: Martin Jelinek at Astro.Inst-AVCR,Ondrejov <martin.jelinek@asu.cas.cz> Martin Jelinek and Jan Strobl (ASU CAS Ondrejov, CZ), Sergey Karpov, Martin Masek, Petr Janecek, Jakub Jurysek, Jan Ebr, Ronan Cunniffe, Petr Travnicek and Michael Prouza (Institute of Physics, Prague, CZ) report: The 25cm robotic telescope FRAM-ORM at La Palma (Spain) reacted to the alert of GRB251002A (Saccardi et al. GCN 42060), obtaining a series of unfiltered images starting at 20:25:24 UT, i.e. ~10.5min post trigger. We clearly detect the optical transient reported by Palmerio et al. (GCN 42061) and Turpin et al. (GCN 42062). At the combination of 9 x 60 s images (Tmid=T0+23.5min) we measure the optical afterglow with the brightness r = 17.8 +/- 0.2 (AB) as calibrated against Atlas-REFCAT (Tonry et al. 2018, ApJ, 867, 105). View this GCN Circular online at https://gcn.nasa.gov/circulars/42063. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...