2014MNRAS.441.1305R

Query : 2014MNRAS.441.1305R

2014MNRAS.441.1305R - Mon. Not. R. Astron. Soc., 441, 1305-1316 (2014/June-3)

Pulse phase-coherent timing and spectroscopy of CXOU J164710.2-45521 outbursts.

RODRIGUEZ CASTILLO G.A., ISRAEL G.L., ESPOSITO P., PONS J.A., REA N., TUROLLA R., VIGANO D. and ZANE S.

Abstract (from CDS):

We present a long-term phase-coherent timing analysis and pulse-phase resolved spectroscopy for the two outbursts observed from the transient anomalous X-ray pulsar CXOU J164710.2-455216. For the first outburst we used 11 Chandra and XMM-Newton observations between 2006 September and 2009 August, the longest baseline yet for this source. We obtain a coherent timing solution with P = 10.61065583(4)s, {dot}P = 9.72(1)x10–13s/s and .¶ = -1.05(5)x10–20s/s2. Under the standard assumptions this implies a surface dipolar magnetic field of ∼ 1014G, confirming this source as a standard B magnetar. We also study the evolution of the pulse profile (shape, intensity and pulsed fraction) as a function of time and energy. Using the phase-coherent timing solution we perform a phase-resolved spectroscopy analysis, following the spectral evolution of pulse-phase features, which hints at the physical processes taking place on the star. The results are discussed from the perspective of magnetothermal evolution models and the untwisting magnetosphere model. Finally, we present similar analysis for the second, less intense, 2011 outburst. For the timing analysis we used Swift data together with 2 XMM-Newton and Chandra pointings. The results inferred for both outbursts are compared and briefly discussed in a more general framework.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): stars: individual: CXOU J164710.2-455216 - stars: magnetars - stars: neutron - X-rays: bursts

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Sgr J0418+5729 gam 04 18 33.867 +57 32 22.91           ~ 244 0
2 PSR J1550-5418 Psr 15 50 54.18 -54 18 23.9           ~ 463 1
3 Cl Westerlund 1 OpC 16 47 02.4 -45 51 07           ~ 655 1
4 PSR J1647-4552 Psr 16 47 10.18 -45 52 16.7           ~ 217 1
5 AX J1809.8-1943 Psr 18 09 51.07 -19 43 51.8           ~ 532 0
6 1WGA J1822.2-1604 X 18 22 18.32 -16 04 27.2           ~ 141 0

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