TITLE: GCN CIRCULAR NUMBER: 35403 SUBJECT: GRID detection of GRB 231205B DATE: 23/12/19 12:35:19 GMT FROM: GRID Student Team at Tsinghua University <grid@tsinghua.edu.cn> Chenyu Wang, Zirui Yang and Longhao Li report on behalf of the GRID Collaboration: GRID-03B and GRID-04, onboard the same CubeSat, report the detection of the long-duration GRB 231205B, which was also detected by Swift/BAT, GECAM-B, and AGILE(GCN Circular 35269, 35279, 35295). The event was triggered with GRID on 2023-12-05 at 16:43:49 UTC. The GRID light curve shows a double-pulse temporal structure. The measured burst duration (T90) in the 30-2000 keV range is approximately 40.2 ± 3.0 seconds. The GRID light curve of this event can be found at https://mirrors.tuna.tsinghua.edu.cn/GRID/data/GRID-GCN/GRB231205B/GRID_2312.... 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. View this GCN Circular online at https://gcn.nasa.gov/circulars/35403. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...