TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3323 SUBJECT: GRB 050502 - A long GRB detected with INTEGRAL DATE: 05/05/02 03:10:02 GMT FROM: Diego Gotz at IASF-CNR D. Gotz, S. Mereghetti (IASF, Milano), N. Mowlavi, S. Shaw, M. Beck (ISDC, Versoix) and J. Borkowski (CAMK, Torun) on behalf of the IBAS Localization Team report: A 20 s long GRB has been detected by IBAS in IBIS/ISGRI data at 02:13:57 UT on May 2. Being at the beginning of a pointing the GRB may last longer. Its coordinates (J2000) are: RA: 202.4392 [degrees] DEC: +42.6741 [degrees] with an uncertainty of 2.0 arcmin (90% c.l. radius). Its preliminary peak flux (20-200 keV, 1s integration time) is about 1.3 ph (1E-07 erg)/cmsq/s. This message can be cited.