/ftp/cats/A+A/556/A139



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J/A+A/556/A139      Spin-period evolution of SXP1062          (Sturm+, 2013)
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	salt_*.dat
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Beginning of ReadMe : J/A+A/556/A139 Spectrum of SXP1062 (Sturm+, 2013) ================================================================================ Long-term evolution of the neutron-star spin period of SXP1062. Sturm R., Haberl F., Oskinova L.M., Schurch M.P.E., Henault-Brunet V., Gallagher J.S.III, Udalski A. <Astron. Astrophys. 556, A139 (2013)> =2013A&A...556A.139S ================================================================================ ADC_Keywords: Binaries, X-ray ; Spectroscopy ; Spectra, red Keywords: pulsars: individual: SXP1062 - galaxies: individual: Small Magellanic Cloud - stars: emission-line, Be - stars: neutron - X-rays: binaries Abstract: 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. 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. 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. The spin period was measured to be Ps=(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. SXP 1062 showed a net spin-down with an average of dPs/dt=(2.27+/-0.44)s/yr over a baseline of 915 days. Description: The spectra of SXP1062 were taken 2012-10-13 using the RSS spectrograph on the Southern African Large Telescope (SALT). They cover the approximate wavelength range 3800-5000AA and 6050-6950AA. The spectra have been redshift corrected for 150km/s and then normalised. Objects: ----------------------------------------------------------- RA (2000) DE Designation(s) ----------------------------------------------------------- 01 27 45.95 -73 32 56.3 SXP1062 = CXOU J012745.9-733256 -----------------------------------------------------------