GCN Circular 8848
A.Tiengo, S.Mereghetti, G.Vianello, P.Esposito (INAF-IASF Milano), G.L.Israel (INAF-OAR), N.Rea (Amsterdam Univ.), D.Gotz (CeA Saclay), on behalf of a larger collaboration report: A Swift/XRT observation performed on January 23 from 15:23 to 15:51 UT in Photon Counting mode shows the presence of a dust scattering halo around the position of the Anomalous X-ray Pulsar 1E1547.0-5408. A bright ring with a radius of about 1 arcmin is clearly visible, but the observation is too short to detect expansion. Assuming that this ring is due to the bright burst detected on Jan 22 at 06:48:04 UT (Mereghetti et al. GCN 8841), and that the distance of 1E1547.0-5408 is 10 kpc, the distance inferred for the dust layer responsible for the scattering is about 7 kpc. Further observations to measure the time evolution of the dust scattering rings can provide tighter constraints.