TITLE: GCN CIRCULAR NUMBER: 18862 SUBJECT: GRB 160113A: Swift-XRT observations DATE: 16/01/14 10:15:05 GMT FROM: Sarah Gibson at U.of Leicester A.P. Beardmore (U. Leicester), V. D'Elia (ASDC), A. D'Ai (INAF-IASFPA), A. Maselli (INAF-IASFPA), L.M. McCauley (PSU), J.A. Kennea (PSU), B. Sbarufatti (INAF-OAB/PSU), S.L. Gibson (U. Leicester) and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team: Swift-XRT has performed follow-up observations of the Fermi/GBM-detected burst GRB 160113A (Roberts et al. GCN Circ. 18861), collecting 2.7 ks of Photon Counting (PC) mode data between T0+46.7 ks and T0+53.0 ks. The pointing was aimed at the optical transient candidate iPTF15flo (Singer et al. GCN Circ. 18859). No X-ray sources have been detected inside or close to the iPTF15flo error region. The 3-sigma upper limit at the iPTF15flo position is 0.005 ct s^-1, corresponding to a 0.3-10 keV observed flux of 2.1e-13 erg cm^-2 s^-1 (assuming a typical GRB spectrum). The results of the XRT-team automatic analysis of the XRT observations, including a position-specific upper limit calculator, are available at http://www.swift.ac.uk/ToO_GRBs/00020594. This circular is an official product of the Swift-XRT team.