TITLE: GCN CIRCULAR NUMBER: 10710 SUBJECT: INTEGRAL observations of Swift GRB trigger 421072 DATE: 10/05/04 17:16:07 GMT FROM: Diego Gotz at CEA E.Bozzo, N. Produit (ISDC), S.Mereghetti, A.Paizis (IASF Milano), D.Gotz (CEA-Saclay) on behalf of the IBAS Localization Team report: the position of the Swift trigger 421072 (GCN 10708, Pagani et al. 2010) was in the field of view of the INTEGRAL IBIS instrument at the time of the trigger, although at a very large off-axis angle (~9 degrees outside the field of view of the JEM-X instrument). An analysis of the IBIS/ISGRI image integrated over 90 sec around the time of the trigger, from 4 May 2010 at 7:27:50 UT to 4 May 2010 at 7:29:20 UT, did not show any source and resulted in an upper limit of 460 mCrab in the 20-40 keV energy range (3 sigma c.l.). Also integrating over a longer time interval (~2000 s), from 4 May 2010 at 7:00:23 UT to 4 May 2010 at 7:32:53 UT, no source is detected within the Swift error region, and the corresponding upper limit is 65 mCrab (20-40 keV). This message can be cited.