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We report the discovery of a new Small Magellanic Cloud Pulsar Wind Nebula(PWN) at the edge of the Supernova Remnant (SNR)-DEM S5. The pulsar poweredobject has a cometary morphology similar to the Galactic PWN analogs PSRB1951+32 and 'the mouse'. It is travelling supersonically through theinterstellar medium. We estimate the Pulsar kick velocity to be in the range of700-2000 km/s for an age between 28-10 kyr. The radio spectral index for thisSNR PWN pulsar system is flat (-0.29 $\pm$ 0.01) consistent with other similarobjects. We infer that the putative pulsar has a radio spectral index of -1.8,which is typical for Galactic pulsars. We searched for dispersion measures(DMs) up to 1000 cm/pc^3 but found no convincing candidates with a S/N greaterthan 8. We produce a polarisation map for this PWN at 5500 MHz and find a meanfractional polarisation of P $\sim 23$ percent. The X-ray power-law spectrum(Gamma $\sim 2$) is indicative of non-thermal synchrotron emission as isexpected from PWN-pulsar system. Finally, we detect DEM S5 in Infrared (IR)bands. Our IR photometric measurements strongly indicate the presence ofshocked gas which is expected for SNRs. However, it is unusual to detect suchIR emission in a SNR with a supersonic bow-shock PWN. We also find alow-velocity HI cloud of $\sim 107$ km/s which is possibly interacting with DEMS5. SNR DEM S5 is the first confirmed detection of a pulsar-powered bow shocknebula found outside the Galaxy.

Discovery of a Pulsar-powered Bow Shock Nebula in the Small Magellanic Cloud Supernova Remnant DEMS5