TITLE: GCN CIRCULAR NUMBER: 44228 SUBJECT: GRID detection of GRB 260401A DATE: 26/04/07 12:10:47 GMT FROM: GRID Student Team at Tsinghua University <grid@tsinghua.edu.cn> Longhao Li, Xiangyi Wang, Chenyu Wang, Zirui Yang report on behalf of the GRID Collaboration: GRID-11B reports the detection of the long-duration GRB 260401A, which was also detected by Fermi-GBM (Fermi GBM team, GCN 44174) , MAXI/GSC (Usuki et al., GCN 44176), CALET/GBM (Cannady et al., GCN 44177), NuSTAR (Waratkar et al., GCN 44178), MASTER-OAFA (Lipunov et al., GCN 44180), GECAM-B (Ren et al., GCN 44187) and SVOM/GRM (Ren et al., GCN 44188). The event was triggered with GRID-11B on 2026-04-01 at 10:53:33 UTC. The measured burst duration (T90) in the 30-2000 keV range is approximately 8.0 +/- 5.7 seconds. At present, only the GRID light curve is available. No spectral analysis is reported at this stage. The GRID light curve of this event can be found at https://mirrors.tuna.tsinghua.edu.cn/GRID/data/GRID-GCN/GRB260401A/GRID_2604... 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/44228. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...