TITLE: GCN CIRCULAR NUMBER: 10485 SUBJECT: GRB 100316A: Swift-XRT detection DATE: 10/03/16 04:12:35 GMT FROM: Andy Beardmore at U Leicester A.P. Beardmore, K.L. Page and O. Littlejohns (U. Leicester) report on behalf on the Swift-XRT team: Using 2.4ks of promptly downlinked data starting at 51.8 minutes after the trigger we find an uncatalogued X-ray source located at RA, Dec = 251.9789, 71.8265 which is equivalent to: RA (J2000.0) = 16 47 54.94 DEC (J2000.0) = +71 49 35.3 with an uncertainty of 4.53 arcsec (radius, 90% containment). It is not possible to tell whether the source is fading with the limited data available so far.