There is also evidence for a counter jet in the opposite direction. These jets have a position angle of $130^{\circ}$ (measured East of North), and are aligned to within $8^{\circ}\pm5^{\circ}$ degrees with the pulsar’s proper motion vector (Bailes et al. 1990; DeLuca, Mignani, and Caraveo 2000).

Concentric with the pulsar is a diffuse outer arc of emission perpendicular to the jet. This feature is roughly elliptical in shape and subtends an angle of $\sim 150$ degrees as seen from the pulsar. Interior to this arc is an elliptical ring of emission with a curvature very similar to the outer arc. The pulsar, jet, and arcs are embedded in a extended nebula of faint diffuse emission which has been described as ”kidney-bean" shaped (Markwardt and Ögelman 1998). The configuration of the jet feature relative to the nebula is reminiscent of the  image of the Crab Nebula (Fig. 3; see Weisskopf et al. 2000).

We determined the count rates by extracting counts from the various regions discussed above (see Figure 4). For each source region we carefully estimated the background. For the diffuse emission, we determined the HRC detector background derived from an annulus $13.2^{\prime\prime}$ wide exterior to the kidney bean emission 