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_231205B_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.