TITLE: GCN CIRCULAR NUMBER: 16975 SUBJECT: IPN triangulation of GRB 141028A DATE: 14/10/28 21:30:37 GMT FROM: Kevin Hurley at UCBerkeley/SSL K. Hurley, on behalf of the IPN, J. Goldsten, on behalf of the MESSENGER NS GRB team, and V. Connaughton, M. S. Briggs, C. Meegan, and V. Pelassa, on behalf of the Fermi GBM team, report: GRB 141028A (Bissaldi et al. GCN 16969, Roberts et al. GCN 16971) has also been observed by MESSENGER, so far. We have triangulated it to a preliminary, 3 sigma annulus, centered at RA, Dec = 16.520, +5.123 degrees, with radius R=54.469 +/- 0.200 degrees. This annulus intersects the LAT error circle at two points: RA Dec 322.487 deg -0.619 deg 322.416 deg +0.002 deg forming an error box whose area is approximately 0.03 degrees. This triangulation may be improved. A map has been posted at ssl.berkeley.edu/ipn3/141028A