TITLE: GCN CIRCULAR NUMBER: 14649 SUBJECT: GRB 130514A: Swift-XRT refined Analysis DATE: 13/05/15 01:30:03 GMT FROM: Phil Evans at U of Leicester B.P. Gompertz (U. Leicester), A. Maselli (INAF-IASFPA), V. Mangano (INAF-IASFPA), A. Melandri (INAF-OAB), D.N. Burrows (PSU), J.A. Kennea (PSU), M.C. Stroh (PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester) and E. Sonbas report on behalf of the Swift-XRT team: We have analysed 8.5 ks of XRT data for GRB 130514A (Sonbas et al. GCN Circ. 14632), from 95 s to 37.1 ks after the BAT trigger. The data comprise 405 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Osborne et al. (GCN. Circ 14637). The late-time light curve (from T0+5.8 ks) can be modelled with a power-law decay with a decay index of alpha=1.15 (+0.13, -0.12). A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.82 (+/-0.03). The best-fitting absorption column is 3.14 (+0.13, -0.12) x 10^21 cm^-2, in excess of the Galactic value of 7.6 x 10^20 cm^-2 (Kalberla et al. 2005). The PC mode spectrum has a photon index of 1.99 (+0.20, -0.19) and a best-fitting absorption column of 1.4 (+/-0.5) x 10^21 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.7 x 10^-11 (5.0 x 10^-11) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Total column: 1.4 (+/-0.5) x 10^21 cm^-2 Galactic foreground: 7.6 x 10^20 cm^-2 Excess significance: 2.1 sigma Photon index: 1.99 (+0.20, -0.19) If the light curve continues to decay with a power-law decay index of 1.15, the count rate at T+24 hours will be 9.1 x 10^-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 3.4 x 10^-13 (4.5 x 10^-13) erg cm^-2 s^-1. The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00555821. This circular is an official product of the Swift-XRT team.