TITLE: GCN GRB OBSERVATION REPORT NUMBER: 53 SUBJECT: GRB980326 IPN annulus DATE: 98/04/09 01:05:15 GMT FROM: Kevin Hurley at UC Berkeley (khurley@sunspot.ssl.berkeley.edu) K. Hurley (UCB) on behalf of the Ulysses GRB team, M. Feroci (IAS/CNR, Rome) and F. Frontera (ITESRE/CNR, Bologna) on behalf of the BeppoSAX/GRBM Team report: We have derived a preliminary IPN annulus for this burst using Ulysses and the BeppoSAX Gamma-Ray Burst Monitor. The annulus is described by a circle of radius 40.771 degrees centered at RA(2000) = 154.714 degrees, Declination (2000) = 13.166 degrees. The half-width of the annulus is 0.042 degrees. The annulus intersects the WFC error circle (IAUC 6851) and reduces its area. The intersection points are: RA(2000) Decl (2000) 129.194 o = 8 H 36 M 47 S -18.981 o =-18 o 58 ' 53 " 128.988 o = 8 H 35 M 57 S -18.817 o =-18 o 49 ' 01 " 129.242 o = 8 H 36 M 58 S -18.911 o =-18 o 54 ' 38 " 129.054 o = 8 H 36 M 13 S -18.761 o =-18 o 45 ' 38 " This error box includes the optical transient (GCN #32, IAUC 6852). Further processing will reduce the annulus width. An image may be found at http://ssl.berkeley.edu/ipn3/980326/. This message is citable.