The X-Ray Structure of the VELA X Region Observed from UHURU

The X-ray source 2U 0832-45 in the Vela X region is centered on the pulsar PSR 0833-45 and is less than 1 2 in extent. Weak X-ray emission is seen from two other localized regions within the radio complex, but the diffuse emission of the Vela X-ray nebula seen below 2 keV is not detected in the Uhuru energy range. We consider it likely that the X-ray source at the pulsar is being excited by the rotational energy loss of the pulsar. Subject headings: pulsars - X-ray sources