TITLE: GCN CIRCULAR NUMBER: 46200 SUBJECT: GRB 261108D: SVOM detection of an X-ray transient DATE: 26/11/09 00:32:27 GMT FROM: SVOM_group Li Zhang (IHEP), Hatsune Goto (CEA/RIKEN), Wenjin Xie (NAOC), Wenlong Zhang (PMO), Wenjun Tan (PKU), report on behalf of the SVOM mission team: At 2026-11-08T23:52:36 UTC (T0), SVOM/ECLAIRs triggered and located the gamma-ray burst GRB 261108D (SVOM burst-id sb26110813). 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 4 alerts. CRT provided the alert with the best signal-to-noise-ratio in the image (SNR) of 7.57 in the [5-20] keV energy band over a time window of 5.10 seconds starting at 2026-11-08T23:52:28. The localization of the best alert is R.A., Dec. 170.8495, -77.4870 degrees: R.A. (J2000) = 11h23m23.89s Dec. (J2000) = -77d29m13.07s with a 90% confidence level (C.L.) radius of 10.37 arcmin (including systematic error of 2 arcmin added in quadrature). Due to the sun angle constraint, no immediate slew was performed on this burst. No X-ray observation could be performed by SVOM/MXT for the time being.No optical observation could be performed by SVOM/VT for the time being. 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 Wenjun Tan: tanwj@ihep.ac.cn. Please contact the BA by email if you require additional information.