2015MNRAS.447.2274B

Query : 2015MNRAS.447.2274B

2015MNRAS.447.2274B - Mon. Not. R. Astron. Soc., 447, 2274-2281 (2015/March-1)

NuSTAR detection of a cyclotron line in the supergiant fast X-ray transient IGR J17544-2619.

BHALERAO V., ROMANO P., TOMSICK J., NATALUCCI L., SMITH D.M., BELLM E., BOGGS S.E., CHAKRABARTY D., CHRISTENSEN F.E., CRAIG W.W., FUERST F., HAILEY C.J., HARRISON F.A., KRIVONOS R.A., LU T.-N., MADSEN K., STERN D., YOUNES G. and ZHANG W.

Abstract (from CDS):

We present NuSTAR spectral and timing studies of the supergiant fast X-ray transient (SFXT) IGR J17544-2619. The spectrum is well described by an ∼ 1keV blackbody and a hard continuum component, as expected from an accreting X-ray pulsar. We detect a cyclotron line at 17keV, confirming that the compact object in IGR J17544-2619 is indeed a neutron star. This is the first measurement of the magnetic field in an SFXT. The inferred magnetic field strength, B = (1.45±0.03)x1012G (1 + z) is typical of neutron stars in X-ray binaries, and rules out a magnetar nature for the compact object. We do not find any significant pulsations in the source on time-scales of 1-2000s.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): X-rays: binaries - X-rays: individual: IGR J17544-2619

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7062 0
2 2MASS J16492695-4349090 HXB 16 49 26.95 -43 49 09.0           B0.5Ib 58 0
3 AX J1739.1-3020 HXB 17 39 11.5515537336 -30 20 37.787917704     14.40 13.91   O8.5Iab(f) 156 1
4 IGR J17544-2619 HXB 17 54 25.2722906112 -26 19 52.576928292   14.71 12.94 12.10 10.38 O9Ib 188 0
5 IGR J18410-0535 HXB 18 41 00.4353543192 -05 35 46.474692324   15.91   13.645 11.631 B1Ib 136 0

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