TY  - JOUR
A1  - Sturm, R.
A1  - Haberl, F.
A1  - Oskinova, Lida
A1  - Schurch, M. P. E.
A1  - Henault-Brunet, V.
A1  - Gallagher, J. S.
A1  - Udalski, A.
T1  - Long-term evolution of the neutron-star spin period of SXP1062
JF  - Astronomy and astrophysics : an international weekly journal
N2  - Context. The Be/X-ray binary SXP 1062 is of especial interest owing to the large spin period of the neutron star, its large spin-down rate, and the association with a supernova remnant constraining its age. This makes the source an important probe for accretion physics.
 Aims. To investigate the long-term evolution of the spin period and associated spectral variations, we performed an XMM-Newton target-of-opportunity observation of SXP 1062 during X-ray outburst.
 Methods. Spectral and timing analysis of the XMM-Newton data was compared with previous studies, as well as complementary Swift/XRT monitoring and optical spectroscopy with the SALT telescope were obtained.
 Results. The spin period was measured to be P-s = (1071.01 +/- 0.16) s on 2012 Oct. 14. The X-ray spectrum is similar to that of previous observations. No convincing cyclotron absorption features, which could be indicative for a high magnetic field strength, are found. The high-resolution RGS spectra indicate the presence of emission lines, which may not completely be accounted for by the SNR emission. The comparison of multi-epoch optical spectra suggest an increasing size or density of the decretion disc around the Be star.
 Conclusions. SXP 1062 showed a net spin-down with an average of P-s = ( 2.27 +/- 0.44) s yr(-1) over a baseline of 915 days.
KW  - pulsars: individual: SXP1062
KW  - galaxies: individual: Small Magellanic Cloud
KW  - stars: emission-line, Be
KW  - stars: neutron
KW  - X-rays: binaries
Y1  - 2013
U6  - https://doi.org/10.1051/0004-6361/201321755
SN  - 0004-6361
VL  - 556
IS  - 4
PB  - EDP Sciences
CY  - Les Ulis
ER  -