X-ray spectra from magnetar candidates - III. Fitting SGRs/AXPs soft X-ray emission with non-relativistic Monte Carlo models

Abstract

Within the magnetar scenario, the "twisted magnetosphere" model appears very promising in explaining the persistent X-ray emission from the Soft Gamma Repeaters and the Anomalous X-ray Pulsars (SGRs and AXPs). In the first two papers of the series, we have presented a 3D Monte Carlo code for solving radiation transport as soft, thermal photons emitted by the star surface are resonantly upscattered by the magnetospheric particles. A spectral model archive has been generated and implemented in XSPEC. Here we report on the systematic application of our spectral model to different XMM-Newton and Integral observations of SGRs and AXPs. We find that the synthetic spectra provide a very good fit to the data for the nearly all the source (and source states) we have analyzed.

13 Pages, 7 Figures, 4 Tables, accepted for publication in MNRAS

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• Magnetar outbursts: an observational review
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• Is SGR 0418+5729 indeed a waning magnetar ?
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• Magnetar Broadband X-ray Spectra Correlated with Magnetic Fields: Suzaku Archive of SGRs and AXPs Combined with NuSTAR, Swift, and RXTE
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• The X-Ray Polarization Signature of Quiescent Magnetars: Effect of Magnetospheric Scattering and Vacuum Polarization
• Population Synthesis of Isolated Neutron Stars with magneto-rotational evolution II: from radio-pulsars to magnetars
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• The X-ray outburst of the Galactic Centre magnetar SGR J1745-2900 during the first 1.5 year
• Multi-instrument X-ray monitoring of the January 2009 outburst from the recurrent magnetar candidate 1E 1547.0-5408
• Chandra and RXTE Observations of 1E 1547.0-5408: Comparing the 2008 and 2009 Outbursts
• Search for gamma-ray emission from magnetars with the Fermi Large Area Telescope
• Deep NuSTAR and Swift Monitoring Observations of the Magnetar 1E 1841-045
• X-ray spectra and polarization from magnetar candidates
• On the X-ray Spectra of Anomalous X-ray Pulsars and Soft Gamma Repeaters
• An unified timing and spectral model for the Anomalous X-ray Pulsars XTE J1810-197 and CXOU J164710.2-455216
• Quiescent state and outburst evolution of SGR 0501+4516
• Temporal and spectral evolution in X- and gamma-rays of magnetar 1E 1547.0-5408 since its October 2008 outburst: the discovery of a transient hard pulsed component after its January 2009 outburst
• Early X-ray and optical observations of the soft gamma-ray repeater SGR 0418+5729
• X-ray and radio observations of the magnetar Swift J1834.9-0846 and its dust-scattering halo
• X-ray emission from isolated neutron stars
• Modulating the magnetosphere of magnetars by internal magneto-elastic oscillations
• Probing magnetar emission mechanisms with spectropolarimetry
• Force-free twisted magnetospheres of neutron stars
• The 2006 Outburst of the Magnetar CXOU J164710.2-455216
• Modeling the broadband persistent emission of magnetars
• Detailed X-ray spectroscopy of the magnetar 1E 2259+586
• Activated Magnetospheres of Magnetars
• The magnetar emission in the IR band: the role of magnetospheric currents
• Broadband X-ray Spectral Investigations of Magnetars, 4U 0142+61, 1E 1841-045, 1E 2259+586, and 1E 1048.1-5937
• Broad-band X-ray spectra of anomalous X-ray pulsars and soft $\gamma$-ray repeaters: pulsars in a weak-accretion regime ?
• X-ray Perspective of the Twisted Magnetospheres of Magnetars
• The Galactic population of magnetars : a simulation-based inference study
• Fitting XMM-Newton Observations of the AXP 1RXS J170849.0-400910 with four magnetar surface emission models, and predictions for X-ray polarization observations with IXPE
• The influence of magnetic field geometry on magnetars X-ray spectra
• X-ray Polarization at the Crossroads