TITLE: GCN CIRCULAR NUMBER: 19814 SUBJECT: GRB 160816A: IPN annulus DATE: 16/08/17 18:17:28 GMT FROM: Kevin Hurley at UCBerkeley/SSL K. Hurley, on behalf of the IPN, I. G. Mitrofanov, D. Golovin, M. L. Litvak, and A. B. Sanin, on behalf of the HEND-Odyssey GRB team, W. Boynton, C. Fellows, K. Harshman, H. Enos, and R. Starr, on behalf of the GRS-Odyssey GRB team, S. Golenetskii, R. Aptekar, D. Frederiks, A. Kozlova, D. Svinkin, and T. Cline, on behalf of the Konus-Wind team, and V. Connaughton, M. S. Briggs, C. Meegan, V. Pelassa, and A. Goldstein, on behalf of the Fermi GBM team, report: GRB 160816A has been observed by Konus-Wind (GCN 19810), Fermi GBM and LAT (GCN 19804, GCN 19802), and Mars Odyssey-HEND, so far. We have triangulated it to a preliminary annulus centered at RA, Dec (2000)=63.3328, 24.0531 degrees, with radius 83.8027 +/- 0.1087 degrees (3 sigma). The center line of the annulus passes 0.0086 degrees from the Swift XRT source (GCN 19806), supporting the conclusion that this source is the GRB afterglow. A map has been posted at ssl.berkeley.edu/ipn3/160816A.