GRB 241018A: Detection of a bright long GRB by SVOM

During the commissioning phase, the SVOM/ECLAIRs telescope triggered and located a bright long burst GRB 241018A (sb24101802) at 2024-10-18T11:54:34 UT (T0). The following trigger information was received on the ground with low-latency by the SVOM VHF Alert Network. The burst was detected by both the on-board Count-Rate Trigger (CRT) and Image Trigger (IMT) and 21 alerts were received. The best detection is obtained by CRT with a signal-to-noise ratio of 107.8 in the 8-120 keV energy band over a time window of 10.24 s starting at T0. The burst location is RA, Dec = 67.990, 43.030 (J2000). The statistical uncertainty on this position is 2 arcminutes, to which we recommend adding 2 arcminutes of systematic uncertainty in quadrature. SVOM did perform an automatic slew to the burst. The Space 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 APC, CEA, CNES, and IRAP. The SVOM point of contact for this burst is: Jean-Luc.Atteia@irap.omp.eu