HEAD Division Meeting 1999, April 1999
Session 29. Isolated Pulsars
Poster, Wednesday, April 14, 1999, 8:30am Wed. - 2:00pm Thurs., Gold Room

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[29.03] ROSAT Observations of the Vela Pulsar

F. D. Seward (Harvard-Smithsonian Center for Astrophysics), A. Alpar (Middle East Technical University), C. Flanagan (Hartebeesthoek Radio Astronomy Observatory), C. Markwardt (NASA Goddard Space Flight Center), P. McCulloch (University of Tasmania), H. Ogelman (University of Wisconsin)

The ROSAT HRI has been used to monitor emission from the Vela Pulsar. Six observations span 2-1/2 years and 3 glitches. The summed data yield a good determination of the pulse shape and X-ray emission from the pulsar is found to be 11% pulsed with one broad and two narrow peaks. One observation occurred 15 days after a large glitch. No change in pulse structure was observed and any change in X-ray luminosity, if present, was less than 3%. Implications for neutron star structure are discussed.


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