TITLE: GCN CIRCULAR NUMBER: 17954 SUBJECT: GRB 150622A: Swift-XRT observations DATE: 15/06/22 18:22:32 GMT FROM: Kim Page at U.of Leicester D.N. Burrows (PSU), J.A. Kennea (PSU), V. Mangano (PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), C. Pagani (U. Leicester), A. Melandri (INAF-OAB), P. D'Avanzo (INAF-OAB), V. D'Elia (ASDC) and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team: Swift-XRT has performed follow-up observations of the MAXI-detected burst GRB 150622A (Kawakubo et al. GCN Circ. 17952) in a series of observations tiled on the sky. The total exposure time is 1.9 ks, distributed over 4 tiles; the maximum exposure at a single sky location was 1.3 ks. The data were collected between T0+14.2 ks and T0+16.2 ks, and are entirely in Photon Counting (PC) mode. One uncatalogued X-ray source has been detected, it is below the RASS limit and shows no definitive signs of fading. Therefore, at the present time we cannot confirm this as the afterglow. Details of this source are given below: Source 1: RA (J2000.0): 252.4574 = 16:49:49.79 Dec (J2000.0): -52.8499 = -52:50:59.6 Error: 5.4 arcsec (radius, 90% conf.) Count-rate: 0.032 +/- 0.010 ct s^-1 Flux: (1.29 +/- 0.41)e-12 erg cm^-2 s^-1 (observed, 0.3-10 keV) The results of the XRT-team automatic analysis of the tiled XRT observations, including a position-specific upper limit calculator, are available at http://www.swift.ac.uk/xrt_products/TILED_GRB00046. This circular is an official product of the Swift-XRT team.