GCN Circular 46259
Subject
GRB 261113A: NOT optical observations
Event
Date
2026-11-13T22:30:41Z (2 days ago)
From
luca.izzo@inaf.it
Via
Web form
L. Izzo (INAF/OACN & DARK/NBI), B. Schneider (LAM), D. B. Malesani (DAWN/NBI and Radboud U.), A. Saccardi (CEA/Irfu), G. Corcoran, and A. Martin-Carrillo (UCD) report on behalf of a larger collaboration:
We observed the optical counterpart (Lin et al., GCN 46247; Lei et al., GCN 46248; Li et al., GCN 46249; Yin et al., GCN 46250; Chen et al., GCN 46251; Wu et al., GCN 46252; Zhao et al., GCN 46253; Li et al., GCN 46254; Saikia et al., GCN 46256; Adami et al., GCN 46257; Gress et al. GCN 46258) of the SVOM/ECLAIRs GRB 261113A (Saccardi et. al., GCN 46244) using the Nordic Optical Telescope (NOT) equipped with the ALFOSC instrument. Observations were performed starting at 20:22:14 UT on 13 November 2026 (about 5.85 hr after the SVOM trigger), and consisted of 3x300 s in the SDSS-r band.
In our stacked image, we measure an AB magnitude:
r = 21.23 ± 0.07
This magnitude is calibrated using nearby objects from the Pan-STARRS catalog and is not corrected for Galactic extinction.