Abstract
THE Vela pulsar, PSR0833-45, is a young (104 yr) nearby neutron star emitting pulsed radiation in radio, optical and γ-ray bands1–5. Soft X-ray imaging by the Einstein6 and Exosat7 observatories has revealed a point-like source, at the position of the pulsar, embedded in a compact nebula ~2 arcmin in diameter, but the search for pulsed X-ray emission has proved difficult. There were claims in 1973 of a positive detection8,9 but subsequent observations have failed to confirm them6,10. Here we report an unambiguous detection, by means of the Rosat satellite11, of pulsed X-ray emission from the Vela pulsar, and thus put this long-standing enigma to rest. The pulsed signal is soft, appearing mainly at energies <1 keV. The Rosat observations resolve the two sources of emission, and show that the point-like emission centred on the pulsar is soft, whereas the emission from the compact nebula is hard. Despite the common prejudice that it is the archetypal young pulsar embedded in a supernova remnant, these observations show that Vela more closely resembles older (105 yr) pulsars.
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References
Large, M. I., Vaughan, A. E. & Mills, B. Y. Nature 220, 340–341 (1968).
Wallace, P. T. et al. Nature 266, 692–694 (1977).
Thompson, D. J., Fichtel, C. E., Kniffen, D. A. & Ögelman, H. B. Astrophys. J. 214, L17–L18 (1977).
Kanbach, G. et al. Astr. Astrophys. 90, 163–169 (1980).
Tümer, O. T. et al. Nature 310, 214–216 (1984).
Harnden, F. R. Jr, Grant, P. D. & Seward, F. D. Astrophys. J. 299, 828–838 (1985).
Ögelman, H. & Zimmermann, H.-U. Astr. Astrophys. 214, 179–185 (1989).
Harnden, F. R. Jr, Johnson, W. N. III & Haynes, R. C. Astrophys. J. 172, L91–L94 (1972).
Harnden, F. R. Jr & Gorenstein, P. Nature 241, 107–108 (1973).
Knight, F. K., Matteson, J. L., Peterson, L. E. & Rothschild, R. E. Astrophys. J. 260, 553–560 (1982).
Trümper, J. et al. Adv. Space Res. 2, 241–249 (1983).
Standish, M. Astr. Astrophys. 114, 297–302 (1982).
Buccheri, R. et al. Astr. Astrophys. 128, 245–251 (1983).
Manchester, R. N. & Taylor, J. H. Astr. J. 86, 1953–1973 (1981).
Ögelman, H. in Proc. Workshop Physics of Isolated Pulsars (Cambridge Univ. Press, Cambridge, in the press).
Cheng, K. S., Ho, C. & Ruderman, M. Astrophys. J. 300, 522–539 (1986).
Harding, A. K. Astrophys. J. 245, 267–273 (1981).
Finley, J. P., Ögelman, H. & Kiziloǧlu, Ü. Astrophys. J. 394, L21–L24 (1992).
Halpern, J. P. & Holt, S. S. Nature 357, 222–224 (1992).
Nomoto, K. & Tsuruta, S. Astrophys. J. 312, 711–726 (1987).
Shibazaki, N. & Lamb, F. K. Astrophys. J. 346, 808–822 (1989).
Page, D. & Applegate, J. H. Astrophys. J. 394, L17–L20 (1992).
Romani, R. W. Astrophys. J. 313, 718–726 (1987).
Miller, M. C. in Proc. Workshop Physics of Isolated Pulsars (Cambridge Univ. Press, Cambridge, in the press).
Ventura, J., Shibanov, Yu. A., Zavlin, V. E. & Pavlov, G. G. in Proc. Workshop Physics of Isolated Pulsars (Cambridge Univ. Press, Cambridge, 1992).
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ögelman, H., Finley, J. & Zimmermann, H. Pulsed X-rays from the Vela pulsar. Nature 361, 136–138 (1993). https://doi.org/10.1038/361136a0
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DOI: https://doi.org/10.1038/361136a0
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