GCN Circular 44664
Subject
GRID detection of GRB 260511A
Event
Date
2026-05-19T08:18:09Z (5 months ago)
From
GRID Student Team at Tsinghua University <grid@tsinghua.edu.cn>
Via
Web form
Longhao Li, Siqi Wu, Chenyu Wang, report on behalf of the GRID Collaboration:
GRID-10B and GRID-11B reports the detection of the long-duration GRB 260511A, which was also detected by Fermi GBM (GCN Circular 44529), SVOM (GCN Circular 44532), NuSTAR(GCN Circular 44555), MASS-Cube(GCN Circular 44584), Konus-Wind (GCN Circular 44585), Glowbug(GCN Circular 44586).
The event was triggered with GRID on 2026-05-11 at 06:13:30 UTC. The measured burst duration (T90) in the 30-2000 keV range is approximately T90 = 26.0 +/- 1.3 seconds.
The GRID light curve of this event can be found at https://mirrors.tuna.tsinghua.edu.cn/GRID/data/GRID-GCN/GRB260511A/GRID_260511A_ltcv.pdf.
GRID is a student-led project to monitor the transient gamma-ray sky with multiple detectors onboard different nanosatellites in the era of multi-messenger astronomy. For more information about GRID, please refer to the following references: https://doi.org/10.1007/s10686-019-09636-w and https://doi.org/10.1007/s10686-021-09819-4.