TITLE: GCN CIRCULAR NUMBER: 2459 SUBJECT: GRB 031203: A long GRB detected with INTEGRAL DATE: 03/12/03 23:20:36 GMT FROM: Diego Gotz at IASF-CNR D. Gotz, S Mereghetti, M. Beck and J. Borkowski on behalf of the IBAS Localization Team, N. Mowlavi on behalf of the INTEGRAL Science Data Centre and the INTEGRAL Science Working Team report: A 20 s long GRB has been detected with IBAS at 22:01:28 UTC. The GRB has been detected in IBIS/ISGRI data in the 15-200 keV energy band. The coordinates (J2000) are R.A. 08h 02m 30s Dec. -39deg 50'' 49' with an uncertainty of 2.5 arcmin. This message can be cited