TITLE: GCN CIRCULAR NUMBER: 45041 SUBJECT: GRB 260619A: SVOM/ECLAIRs refined analysis DATE: 26/06/24 20:31:19 GMT FROM: SVOM_group <svomgroup@bao.ac.cn> Nicolas Dagoneau (CEA), Marius Brunet (IRAP), Wenjin Xie (NAOC) Using the event-by-event data downloaded through the X-band ground station, we report further analysis of ECLAIRs observations of GRB 260619A (SVOM burst-id sb26061901). The burst that triggered ECLAIRs onboard (GCN 44985) consists of a faint single peak lightcurve with a duration of about 40 sec in the 8-50 keV energy band. The time-averaged spectrum (from T0-40.96 s to T0) in the energy range 5-120 keV is best fit by a blackbody model with a temperature kT = 6.6 -1.3/+1.6 keV. With this model, the 4-120 keV fluence is (2.03 +/- 0.63)*E-7 erg/cm² and the 4-120 keV photon flux is (2.02 +/- 0.33)*E-1 ph/cm²/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. The SVOM/ECLAIRs point of contact for this burst is: N. Dagoneau (nicolas.dagoneau at cea.fr) View this GCN Circular online at https://gcn.nasa.gov/circulars/45041. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...