TITLE: GCN CIRCULAR NUMBER: 43724 SUBJECT: GRB 260211A - SVOM/ECLAIRs refined analysis DATE: 26/02/13 15:39:21 GMT FROM: SVOM_group <svomgroup@bao.ac.cn> T. Maiolino (LUPM), D. Götz, D. Adrien (CEA/Irfu), M. Brunet (IRAP), F. Piron (LUPM) on behalf of the ECLAIRs team. Using the event-by-event data downloaded through the X-band ground station, we report further analysis of ECLAIRs observations of GRB 260211A (SVOM burst-id 26021102), which was also detected by Fermi/GBM sub-threshold event (GCN #43713). The burst that triggered ECLAIRs onboard (GCN #43705) consists of a double-peaked pulse with a duration of T90 = 21.6 +9.2/-2.8 s in the 4-120 keV energy band. The time-averaged spectrum from T0-7.54 s to T0+13.12 s (T0 = 2026-02-11T19:24:33 UTC) in the energy range 5-120 keV is best fitted by a powerlaw model with a photon index of -1.71 +0.06/-0.07. With this model, the total 4-120 keV fluence is (1.08 ± 0.06)*E-6 erg/cm^2. All the quoted errors are at the 68% confidence level. 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. ECLAIRs was developed jointly by CNES, CEA-IRFU, CNRS-IRAP, CNRS-APC. The SVOM/ECLAIRs point of contact for this burst is: Tais Maiolino (LUPM) (tais.maiolino at lupm.in2p3.fr) View this GCN Circular online at https://gcn.nasa.gov/circulars/43724. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...