TITLE: GCN CIRCULAR NUMBER: 43458 SUBJECT: GRB 251208D: SVOM/ECLAIRs refined analysis DATE: 26/01/19 20:59:19 GMT FROM: SVOM_group <svomgroup@bao.ac.cn> H. Yang, O. Godet (IRAP), F. Daigne (IAP), Z.-Y. Lin, F. Cangemi (APC) Using the event-by-event data downloaded through the X-band ground station, we report further analysis of ECLAIRs observations of the possible faint burst GRB 251208D (SVOM burst-id sb25120806, GCN 43032) detected at T0 = 2025-12-08T16:51:43 UT. The burst that triggered ECLAIRs shows a featureless light curve, and is detected from T0-82 s to T0 in the 8-120 keV energy band. The time-averaged spectrum from T0-82 s to T0 in the 8-120 keV is well fitted by a power-law model with a photon index of 1.8+/-0.4 and a corresponding 4-120 keV fluence of (1.1+/-0.3)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: Hui Yang (IRAP) (hui.yang@irap.omp.eu). View this GCN Circular online at https://gcn.nasa.gov/circulars/43458. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...