TITLE: GCN CIRCULAR NUMBER: 44562 SUBJECT: GRB 260511A: REM near-infrared detection DATE: 26/05/11 18:00:39 GMT FROM: Riccardo Brivio at INAF-OAB <riccardo.brivio@inaf.it> R. Brivio, M. Ferro, P. D'Avanzo, S. Covino, D. Fugazza (INAF-OAB), A. Melandri (INAF-OAR) report on behalf of the REM team: We observed the field of GRB 260511A, detected by SVOM/ECLAIRs (Godet et al., GCN 44532) and Fermi/GBM (Fermi GBM Team, GCN 44529) with the REM 60 cm robotic telescope located at the ESO observatory of La Silla (Chile). The observations were carried out in the H band, started on 2026-05-11 at 06:15:22 UT (i.e. 110 s after the burst) and lasted for about 10 minutes. From preliminary photometry, we detect the optical/NIR counterpart (Jiang et al., GCN 44533; Akl et al. GCN 44534; Saccardi et al. GCN 44535; Zheng et al. GCN 44536; Wu et al., GCN 44538, Harper et al., GCN 44545) with the following magnitude: H = 12.9 +/- 0.2 (Vega; calibrated against the 2MASS catalogue), at a mid-time of 115 s after the trigger. View this GCN Circular online at https://gcn.nasa.gov/circulars/44562. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...