TITLE: GCN CIRCULAR NUMBER: 21354 SUBJECT: GRB 170710B: Further Swift-XRT observations DATE: 17/07/18 05:38:42 GMT FROM: Kim Page at U.of Leicester K.L. Page and P.A. Evans (U. Leicester) report on behalf of the Swift team: Swift performed a further observation of the field of the BAT and Fermi/GBM-detected burst GRB 170710B (Palmer & Lien, GCN Circ. 21316; Hamburg, Meegan & Bissaldi, GCN Circ. 21319) on 2017 July 15. The XRT-detected "Source 1", as given in Page et al. (GCN Circ. 21318), shows no sign of fading, with a count rate of (5.6 +1.9/-1.5)x10^-3 count s^-1 compared to (6.4 +/- 1.5)x10^-3 count s^-1 from the first observation on July 11. This is therefore not the GRB afterglow. This circular is an official product of the Swift-XRT team.