TITLE: GCN CIRCULAR NUMBER: 29372 SUBJECT: GRB 140330A: Swift-XRT refined Analysis DATE: 21/01/29 14:52:21 GMT FROM: Phil Evans at U of Leicester A. D'Ai (INAF-IASFPA), A. Tohuvavohu (U. Toronto), B. Sbarufatti (PSU), D.N. Burrows (PSU), P.A. Evans (U. Leicester), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), A. Melandri (INAF-OAB), T. Sbarrato (INAF-OAB) and report on behalf of the Swift-XRT team: report on behalf of the Swift-XRT team: We have analysed 3.2 ks of XRT data for the Fermi/LAT-detected burst GRB 140330A, from 102.0 ks to 120.0 ks after the Fermi/LAT trigger. The data are entirely in Photon Counting (PC) mode. The refined XRT position is RA, Dec = 325.4425, -64.1882 which is equivalent to: RA (J2000): 21 41 46.19 Dec(J2000): -64 11 17.4 with an uncertainty of 4.0 arcsec (radius, 90% confidence). This position is 7.7 arcmin from the Fermi/LAT position. The source has a mean count rate of 2.4e-02 ct/sec; we cannot determine at the present time whether it is fading. A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.8 (+0.7, -0.5). The best-fitting absorption column is 9 (+17, -5) x 10^20 cm^-2, consistent with the Galactic value of 3.5 x 10^20 cm^-2 (Willingale et al. 2013). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.4 x 10^-11 (4.1 x 10^-11) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Total column: 9 (+17, -5) x 10^20 cm^-2 Galactic foreground: 3.5 x 10^20 cm^-2 Excess significance: <1.6 sigma Photon index: 1.8 (+0.7, -0.5) The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00020372. This circular is an official product of the Swift-XRT team.