SIMBAD references

2016MNRAS.456.4145R - Mon. Not. R. Astron. Soc., 456, 4145-4155 (2016/March-2)

The outburst decay of the low magnetic field magnetar SWIFT J1822.3-1606: phase-resolved analysis and evidence for a variable cyclotron feature.

RODRIGUEZ CASTILLO G.A., ISRAEL G.L., TIENGO A., SALVETTI D., TUROLLA R., ZANE S., REA N., ESPOSITO P., MEREGHETTI S., PERNA R., STELLA L., PONS J.A., CAMPANA S., GOTZ D. and MOTTA S.

Abstract (from CDS):

We study the timing and spectral properties of the low-magnetic field, transient magnetar SWIFT J1822.3-1606 as it approached quiescence. We coherently phase-connect the observations over a time-span of ∼ 500 d since the discovery of SWIFT J1822.3-1606 following the Swift-Burst Alert Telescope (BAT) trigger on 2011 July 14, and carried out a detailed pulse phase spectroscopy along the outburst decay. We follow the spectral evolution of different pulse phase intervals and find a phase and energy-variable spectral feature, which we interpret as proton cyclotron resonant scattering of soft photon from currents circulating in a strong ( ≳ 1014 G) small-scale component of the magnetic field near the neutron star surface, superimposed to the much weaker ( ∼ 3x1013 G) magnetic field. We discuss also the implications of the pulse-resolved spectral analysis for the emission regions on the surface of the cooling magnetar.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2016)

Journal keyword(s): stars: individual: SWIFT J1822.3-16066 - stars: magnetar - stars: neutron - X-rays: bursts

Simbad objects: 7

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2021.06.16-20:15:18

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