TITLE: GCN CIRCULAR NUMBER: 45079 SUBJECT: GRB 260705A: SVOM detection of a burst DATE: 26/07/05 14:25:13 GMT FROM: SVOM_group <svomgroup@bao.ac.cn> A. Saccardi (CEA/Irfu), N. Dagoneau (CEA/Irfu), D. Turpin (CEA/Irfu), X. Tian (GXU), Z. Liu (GZNU), report on behalf of the SVOM mission team: At 2026-07-05T13:06:46 UTC (T0), SVOM/ECLAIRs triggered and located the gamma-ray burst GRB 260705A (SVOM burst-id sb26070502). The following trigger information was received on the ground with low latency by the SVOM VHF Alert Network. The burst was detected both by the Count-Rate Trigger (CRT) and the Image Trigger (IMT), which produced a sequence of 16 alerts. IMT provided the alert with the best signal-to-noise-ratio in the image (SNR) of 11.38 in the [8-120] keV energy band over a time window of 40.96 seconds starting at 2026-07-05T13:06:28. The localization of the best alert is R.A., Dec. 58.2851, -31.6391 degrees: R.A. (J2000) = 3h53m08.43s Dec. (J2000) = -31d38m20.61s with a 90% confidence level (C.L.) radius of 7.06 arcmin (including systematic error of 2 arcmin added in quadrature). The SVOM/ECLAIRs light curve showed a broad peak structure with a T90 duration of about 18.387 (-3.43 +11.095). This burst was also detected by SVOM/GRM with a significance of 10.40. The SVOM/GRM light curve showed a broad peak structure with a T90 duration of about 33.216 (-8.32 +11.914). Due to sun 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 Xiao Tian: tianxiao@st.gxu.edu.cn Please contact the BA by email if you require additional information. View this GCN Circular online at https://gcn.nasa.gov/circulars/45079. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...