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We report on the results of Swift and XMM-Newton observations of SMC X-2during its last outburst in 2015 October, the first one since 2000. The sourcereached a very high luminosity ($L \sim 10^{38}$ erg s$^{-1}$), which allowedus to perform a detailed analysis of its timing and spectral properties. Weobtained a pulse period $P_{\rm spin}$ = 2.372267(5) s and a characterizationof the pulse profile also at low energies. The main spectral component is ahard ($\Gamma \simeq 0$) power-law model with an exponential cut-off, but atlow energies we detected also a soft (with kT $\simeq$ 0.15 keV) thermalcomponent. Several emission lines can be observed at various energies. Theidentification of these features with the transition lines of highly ionized N,O, Ne, Si, and Fe suggests the presence of photoionized matter around theaccreting source.

Spectral analysis of SMC X-2 during its 2015 outburst