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We present the results of XMM-Newton survey of the northern part of the diskof M31. The results of a spectral and timing analysis of the thirty sevenbrightest sources are presented. Combining the results of X-ray analysis withavailable data at other wavelengths, we were able to classify ~50%, or 19 outof 37 sources. Two sources in our sample were previously unknown: the hardX-ray source XMMU J004415.8+413057 and a transient supersoft sourceXMMUJ004414.1+412206. We report the discovery of possible X-ray pulsations fromthe source XMMUJ004415.8+413057 with a period of 197 s. The spectral and timingproperties of XMMU J004415.8+413057 make it first accreting X-ray pulsarcandidate detected in M31. We report on the first unambiguous detection of thesoft unresolved X-ray emission from the disk of M31. The unresolved emissionfollows the pattern of the spiral arms and can be traced up to distance of ~0.5deg (~7 kpc at 760 kpc) from the center of the galaxy. The spectrum of theunresolved emission shows dominant soft thermal component which can be fittedwith a ~0.3 keV optically thin thermal plasma emission models. We suggest thatsignificant part of this diffuse soft X-ray component may represent hot diffusegas in the spiral arms of M31 and emission from normal stars in the disk ofM31.

XMM‐NewtonObservations of the M31 Northern Disk: Properties of Selected X‐Ray Sources and Unresolved Emission