GCN Circular 16670
K.L. Page, P.A. Evans (U. Leicester) and S.B. Cenko (GSFC) report on behalf of the Swift-XRT team: We have analysed 3.0 ks of XRT data for the GBM-detected burst: GRB 140808A (Zhang, GCN Circ. 16669), from 41.9 ks to 52.0 ks after the GBM trigger. The data are entirely in Photon Counting (PC) mode. An X-ray source is detected within the XRT field of view. Using 1513 s of PC mode data and 1 UVOT images, we find an enhanced XRT position (using the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue): RA, Dec = 221.22196, +49.21463 which is equivalent to: RA (J2000): 14h 44m 53.27s Dec(J2000): +49d 12' 52.7" with an uncertainty of 3.3 arcsec (radius, 90% confidence). This position is 1.6 arcsec from the iPTF position (Singer et al., GCN CIrc. 16668). The source has a mean count rate of 1.5e-02 ct/sec; we cannot determine at the present time whether it is fading. We note that this count rate is just below the ROSAT All Sky Survey detection limit, so this source would not have been listed in the RASS. However, given the transient nature of the iPTF optical candidate, it seems likely this is a new X-ray source. The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00020403. This circular is an official product of the Swift-XRT team.