TITLE: GCN CIRCULAR NUMBER: 44882 SUBJECT: GRB 260608A: SVOM/ECLAIRs refined analysis DATE: 26/06/09 11:54:47 GMT FROM: SVOM_group <svomgroup@bao.ac.cn> M. Brunet, L. Bouchet (IRAP), C.-W. Wang (IHEP) D.-F. Kong (GXU) report on behalf of the SVOM/ECLAIRs team: Using the event-by-event data downloaded through the X-band ground station, we report further analysis of SVOM/ECLAIRs observations of GRB 260608A (SVOM burst-id sb260608A – GCN 44870, trigger time T0 = 2026-06-08T11:35:32 UTC), which was also detected by Fermi/GBM (GCN 44868). The burst that triggered ECLAIRs onboard shows a multiple peak lightcurve. The burst duration is T90 = 57.4 +3.8/-2.6 s in the 4-120 keV energy band. The time-averaged spectrum from T0-5.2 s s to T0+52.0 s in the 5-120 keV energy range is best fitted by a powerlaw model with alpha = -1.51 +/- 0.04. With this model, the 4-120 keV fluence is (3.1 +/- 0.1)e-6 erg/cm^2 and the 4-120 keV photon flux is 1.55 +/- 0.04 ph/cm^2/s. 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: Marius Brunet (IRAP) (marius.brunet at utoulouse.fr) View this GCN Circular online at https://gcn.nasa.gov/circulars/44882. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...