  We report the discovery of a new high mass X-ray binary pulsar, XMMU
J050722.1-684758, possibly associated with the supernova remnant MCSNR
J0507-6847 in the Large Magellanic Cloud, using XMM-Newton X-ray observations.
Pulsations with a periodicity of 570 s are discovered from the Be X-ray binary
XMMU J050722.1-684758 confirming its nature as a HMXB pulsar. The HMXB is
located near the geometric centre of the supernova remnant MCSNR J0507-6847
(0.9 arcmin from the centre) which supports the XRB-SNR association. The
estimated age of the supernova remnant is 43-63 kyr which points to a middle
aged to old supernova remnant. The large diameter of the supernova remnant
combined with the lack of distinctive shell counterparts in optical and radio
indicates that the SNR is expanding into the tenous environment of the
superbubble N103. The estimated magnetic field strength of the neutron star is
$B\gtrsim10^{14}$ G assuming a spin equilibrium condition which is expected
from the estimated age of the parent remnant and assuming that the measured
mass-accretion rate remained constant throughout.
