//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 19442 SUBJECT: GRB 160521A: a long GRB detected by INTEGRAL DATE: 16/05/21 04:45:52 GMT FROM: Sandro Mereghetti at IASF-Milano/INAF S.Mereghetti (IASF-Milano), D.Gotz (CEA, Saclay), C.Ferrigno, E.Bozzo, L.Di Gesu' (ISDC, Versoix), and J.Borkowski (CAMK, Torun) on behalf of the IBAS Localization Team report: a gamma ray burst lasting about 160 s has been detected by IBAS in the IBIS/ISGRI data at 03:37:20 UT of May 21, 2016. The refined coordinates (J2000) are: R.A.= 129.7108 DEC.= 46.9142 with an uncertainty of 1.5 arcmin (90% c.l.). The burst had a peak flux of 0.8 counts/cm2/s (20-200 keV, 1-s integration time) and a fluence in the same energy range of about 1.2e-6 erg/cmq. A plot of the light curve will be posted at http://ibas.iasf-milano.inaf.it/IBAS_Results.html //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 19534 SUBJECT: GRB 160521A: 15 GHz detections and upper limit from AMI DATE: 16/06/14 16:24:06 GMT FROM: Kunal Mooley at Oxford U K. P. Mooley, T. D. Staley, R. P. Fender (Oxford), G. E. Anderson (Curtin), T. Cantwell (Manchester), C. Rumsey, D. Titterington, S. H. Carey, J. Hickish, Y. C. Perrott, N. Razavi-Ghods, P. Scott (Cambridge), K. Grainge, A. Scaife (Manchester) We observed the INTEGRAL/IBIS GRB 160521A (Mereghetti et al., GCN 19442) with the AMI Large Array at 15 GHz on 2016 May 24.62, May 27.52, and Jun 03.61 (UT) as part of the 4pisky program. We detect a transient radio source (RA=08:38:51.3 +/-6 arcsec, Dec=+46:54:21 +/-24 arcsec) within the INTEGRAL error circle at 266+/-36 uJy and 133+/-29 uJy in the first two epochs, and obtain a 3sigma upper limit of 93 uJy in the third epoch. We thank the AMI staff for scheduling these observations. The AMI-GRB database is a log of all GRB follow up observations with the AMI, and is available at http://4pisky.org/ami-grb/.