<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Vasilopoulos, G.</style></author><author><style face="normal" font="default" size="100%">Zezas, A.</style></author><author><style face="normal" font="default" size="100%">Antoniou, V.</style></author><author><style face="normal" font="default" size="100%">Haberl, F.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">SXP 15.6: X-ray spectral and temporal properties of a newly discovered pulsar in the Small Magellanic Cloud</style></title><short-title><style face="normal" font="default" size="100%">Monthly Notices of the Royal Astronomical Society</style></short-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">galaxies: individual: Small Magellanic Cloud</style></keyword><keyword><style  face="normal" font="default" size="100%">pulsars: individual: SXP 15.6</style></keyword><keyword><style  face="normal" font="default" size="100%">stars: neutron</style></keyword><keyword><style  face="normal" font="default" size="100%">X-rays: binaries</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2017</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2017/10/1</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://ui.adsabs.harvard.edu/abs/2017MNRAS.470.4354V</style></url></web-urls></urls><publisher><style face="normal" font="default" size="100%">OUP</style></publisher><volume><style face="normal" font="default" size="100%">470</style></volume><pages><style face="normal" font="default" size="100%">4354 - 4362</style></pages><isbn><style face="normal" font="default" size="100%">0035-8711</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">We report on the X-ray spectral and temporal properties of the Be/X-ray binary system XMMU J004855.5-734946 located in the Small Magellanic Cloud. The system was monitored by Swift/XRT during a moderate outburst in 2016 July, while an unanticipated Chandra target of opportunity observation was triggered when the luminosity of the system was greater than 10&lt;SUP&gt;36&lt;/SUP&gt; erg s&lt;SUP&gt;-1&lt;/SUP&gt; allowing a detailed study of X-ray properties of the systems. Specifically, its X-ray spectrum, as observed during the outburst, is well modelled by an absorbed power law (Γ = 0.58). Timing analysis of the collected photon events revealed coherent X-ray pulsations with a period of ∼15.64 s, thus confirming XMMU J004855.5-734946 as a high-mass X-ray binary pulsar. By analysing archival XMM-Newton observations, we determined the long-term spin period evolution of the neutron star, showing that the compact star has spun-up by \dot{P}∼ -0.0028 s yr^{-1}. By modelling the X-ray pulsed emission as detected by Chandra, we set constraints on the inclination of the magnetic and rotation axis of the neutron star, as well to its compactness (I.e. (M/M&lt;SUB&gt;⊙&lt;/SUB&gt;)/(R/km) = 0.095 ± 0.007).</style></abstract></record></records></xml>