TITLE: GCN CIRCULAR NUMBER: 45422 SUBJECT: GRB 260822A: SVOM detection of a short burst DATE: 26/08/22 17:21:32 GMT FROM: SVOM_group <svomgroup@bao.ac.cn> S. Schanne, D. Turpin, D. Götz (CEA/Irfu) report on behalf of the SVOM mission team: At 2026-08-22T16:50:36 UTC (T0), SVOM/ECLAIRs triggered and located the gamma-ray burst GRB 260822A (SVOM burst-id sb26082201). The following trigger information was received on the ground with low latency by the SVOM VHF Alert Network. The burst was only detected by the Count-Rate Trigger (CRT), which produced a sequence of 5 alerts. CRT provided the alert with the best signal-to-noise-ratio in the image (SNR) of 8.62 in the [8-120] keV energy band over a time window of 0.16 seconds starting at 2026-08-22T16:50:36.63 (Tb). The localization of the best alert is R.A., Dec. 2.4240, 1.3876 degrees: R.A. (J2000) = 0h09m41.75s Dec. (J2000) = 1d23m15.50s with a 90% confidence level (C.L.) radius of 9.15 arcmin (including systematic error of 2 arcmin added in quadrature). The SVOM/ECLAIRs light curve showed a single narrow peak with a duration of about 100 ms. This burst also triggered SVOM/GRM at 2026-08-22T16:50:36 on a timescale of 0.10 seconds with an SNR of 6.20. The SVOM/GRM light curve showed a single narrow peak with a duration of about 100 ms. SVOM slewed to the burst. At the time of the trigger, MXT was in Earth occultation. Observations performed by SVOM/MXT and SVOM/VT will be reported in a future circular. The Space-based multi-band astronomical Variable Objects Monitor (SVOM) is a China-France joint mission led by the Chinese National Space Administration (CNSA), French Space Agency (CNES), and the Chinese Academy of Sciences (CAS), which is dedicated to observing gamma-ray bursts and other transient phenomena in the energetic universe. SVOM/ECLAIRs was developed jointly by CNES, CEA-IRFU, CNRS-IRAP, CNRS-APC. SVOM/GRM was developed by the Institute of High Energy Physics (IHEP) of CAS. SVOM/MXT was developed jointly by CNES, CEA-IRFU, CNRS-IJCLab, University of Leicester, MPE. The Burst Advocate (BA) on shift for this alert is Damien Turpin (damien.turpin@cea.fr). Please contact the BA by email if you require additional information. View this GCN Circular online at https://gcn.nasa.gov/circulars/45422. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...