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We present a Chandra Director's Discretionary Time observation of PSRJ1119-6127 and its compact X-ray pulsar wind nebula (PWN) obtained on 27October 2016, three months after the Fermi and Swift detection of millisecondbursts in hard X-rays, accompanied by >160 times increase in flux. Thismagnetar-like activity, the first observed from a rotation-powered radiopulsar, provides an important probe of the physical processes thatdifferentiate radio pulsars from magnetars. The post-burst X-ray spectrum ofthe pulsar can be described by a single powerlaw model with a photon index of2.0\pm0.2 and an unabsorbed flux of 5.7e-12 ergs/cm^2/s in the 0.5-7.0 keVenergy range. At the time of Chandra observations, the pulsar was stillbrighter by a factor of ~22 in comparison with its quiescence. The X-ray imagesreveal a nebula brighter than in the pre-burst Chandra observations (from 2002and 2004), with an unabsorbed flux of 2.2e-13 ergs/cm^-2/s. This implies acurrent X-ray efficiency of ~0.001 at a distance of 8.4 kpc. In addition, afaint torus-like structure is visible along the southeast-northwest directionand a jet-like feature perpendicular to the torus towards the southwest. ThePWN is best fitted by an absorbed powerlaw with a photon index of 2.2\pm0.5(post-burst). While the pulsar can still be energetically powered by rotation,the observed changes in PSR~J1119-6127 and its PWN following the magnetar-likebursts point to an additional source of energy powered by its high-magneticfield.

PSR J1119-6127 and its pulsar wind nebula following the magnetar-like bursts