TITLE: GCN CIRCULAR NUMBER: 44646 SUBJECT: GRB 260515A: Liverpool Telescope optical detection DATE: 26/05/16 14:32:40 GMT FROM: Dimple at University of Birmingham <dimplepanchal96@gmail.com> Dimple (U. Birmingham), B. P. Gompertz (U. Birmingham), P. O'Brien (U. Leicester), D. O'Neill (U. Birmingham) and D. B. Malesani (DAWN/NBI and Radboud) report on behalf of a larger collaboration: We conducted follow-up observations of GRB 260515A (Brunet et al., GCN 44622) with the IO:O camera on the 2m robotic Liverpool Telescope (LT). Observations began at 22:42:40 UT on 2026-05-15, ~3.57 hr after the burst, and consisted of 5 x 200 s exposures in each of the SDSS g and i filters. We detect the optical counterpart (He et al., GCN 44623; Saccardi et al., GCN 44624; Sosnovskij et al., GCN 44625; He et al., GCN 44626; Wu et al., GCN 44628, Dennefeld et al., GCN 44633; Li et al., GCN 44634, Antier et al., GCN 44643) in both filters, and measure an AB magnitude of g = 21.06 ± 0.04. Magnitudes are calibrated against nearby Pan-STARRS stars and are not corrected for Galactic extinction. View this GCN Circular online at https://gcn.nasa.gov/circulars/44646. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...