TITLE: GCN CIRCULAR NUMBER: 7064 SUBJECT: Swift XRT follow-up observations of GRB071028B DATE: 07/11/12 20:25:48 GMT FROM: Dirk Grupe at PSU/Swift-XRT Dirk Grupe (PSU) reports on behalf of the Swift XRT team: The Swift XRT re-observed the field of GRB 071028B (GCN 7019; Cummings 2007) on 2007 November 07 for 9 ks and 2007 November 10 for 11ks. Clearly the first source listed in GCN Circ 7040 (Grupe & Schady, 2007) had faded while the second source is still visible at a similar level as reported in GCN 7040. It is therefore clear that this first source was the X-ray afterglow of GRB 070128, since its flux decreased. The position of the X-ray afterglow of GRB 071028B is RA-2000, Dec-2000 354.16300, -31.62050 which corresponds to RA-2000 = 23 36 39.1 Dec-2000 = -31 37 13.8 with a 4.8" XRT error circle. The 3-sigma upper limit at the position of the burst combining both data sets (20ks) is 6.7e-4 counts/s which converts roughly to 3e-14 ergs/s/cm2. This circular is an official product of the Swift team