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The X-ray source CXOU J163802.6-471358is thought to be a pulsar wind nebula(PWN), as it shows an extended, $\approx 40$ arcsec trail from a compactsource. Here we present GMRT observations of this source at 330 and 1390 MHz,which reveal a remarkable linear radio trail $\approx 90$ arcsec in extent.Although the radio trail points back to the supernova remnant (SNR) G338.1+0.4,$\approx 50$ arcmin from ,CXOU J163802.6-471358 associating it with thisremnant would require a very large velocity for the pulsar. There are no knowngalactic SNRs close to the PWN and radio trail. No pulsar has yet beenidentified in CXOU J163802.6-471358, but if one could be found, this wouldallow more quantitative studies of the PWN and radio trail to be made.

GMRT observations of the radio trail from CXOU J163802.6-471358