Discovery of annular X-ray emission centered on MAXI J1421-613: Dust-scattering X-rays?
arXiv:2002.03096 · doi:10.1093/pasj/psaa007
Abstract
We report the discovery of an annular emission of 3'-9' radius around the center of a transient source, an X-ray burster MAXI J1421-613, in the Suzaku follow-up analysis. The spectrum of the annular emission shows no significant emission-line structure, and is well explained by an absorbed power law model with a photon index of 4.2. These features exclude the possibility that the annular emission is a shell-like component of a supernova remnant. The spectral shape, the time history, and the X-ray flux of the annular emission agree with the scenario that the emission is due to a dust-scattering echo. The annular emission is made under a rare condition of the dust-scattering echo, where the central X-ray source, MAXI J1421-613, exhibits a short time outburst with three X-ray bursts and immediately re-enters a long quiescent period. The distribution of the hydrogen column density along the annular emission follows that of the CO intensity, which means that MAXI J1421-613 is located behind the CO cloud. We estimate the distance to MAXI J1421-613 to be 3~kpc assuming that the dust layer responsible for the annular emission is located at the same position as the CO cloud.
arXiv comment11 pages, 3 figures, accepted for publication in Publications of the Astronomical Society of Japan (PASJ)
References in corpus (21)
- The Milky Way in Molecular Clouds: A New Complete CO Survey
- Monte-Carlo Simulator and Ancillary Response Generator of Suzaku XRT/XIS System for Spatially Extended Source Analysis
- Scattering by Interstellar Dust Grains. II. X-Rays
- Reproducibility of Non-X-ray Background for the X-ray Imaging Spectrometer aboard Suzaku
- Fine Structures of Shock of SN 1006 with the Chandra Observation
- Discovery of Non Thermal X-Rays from the Northwest Shell of the New SNR RX J1713.7-3946: The Second SN1006 ?
- Milky Way Kinematics: Measurements at the Subcentral Point of the Fourth Quadrant
- The dust-scattering X-ray rings of the anomalous X-ray pulsar 1E 1547.0-5408
- The discovery of an evolving dust scattered X-ray halo around GRB 031203
- XMM-Newton observations of the Galactic Supernova Remnant CTB 109 (G109.1-1.0)
- Restoring the Suzaku Source Position Accuracy and Point-Spread Function
- Using the X-ray Dust Scattering Halo of Cygnus X-1 to determine distance and dust distributions
- Dust-scattered X-ray halos around gamma-ray bursts: GRB 031203 revisited and the new case of GRB 050713A
- The dust-scattered X-ray halo around Swift GRB 050724
- A Joint Chandra and Swift View of the 2015 X-Ray Dust Scattering Echo of V404 Cygni
- The X-ray dust scattered rings of the black hole low mass binary V404 Cyg
- Dust-scattered X-ray halos around two Swift gamma-ray bursts: GRB 061019 and GRB 070129
- Behind the dust curtain: the spectacular case of GRB 160623A
- SGR 1806-20 distance and dust properties in molecular clouds by analysis of a flare x-ray echoes
- X-ray Scattered Halo around IGR J17544-2619
- Low-Mass X-Ray Binary MAXI J1421-613 Observed by MAXI GSC and Swift XRT