Irregularities in the Crab Pulsar Wobble

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THIS article presents new measurements of the arrival times of optical pulses from the Crab pulsar, NP 0532. The observations were obtained at Hamburg Observatory (Bergedorf) with a 60 cm refractor and a data acquisition system with an on-line computer (PDP-8/S). Comparison of our results with those obtained by Boynton et al.1 and Richards et al.2 does not support the assumption of a periodic wobble with a period of 77 days (ref. 2).

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  1. 1

    Boynton, P. E., Groth, E. J., Partridge, R. B., and Wilkinson, D. T., Astrophys. J. Lett., 157, L197 (1969).

  2. 2

    Richards, D. W., Pettengill, G. H., Counselman, C. C. III, and Rankin, J. M., Astrophys. J. Lett., 160, L1 (1970).

  3. 3

    Høg, E., Astron. Astrophys. 4, 94, (1970).

  4. 4

    Warner, B., Nather, R. E., and MacFarlane, M., Nature, 222, 233 (1969).

  5. 5

    Clemence, G. M., and Szebehely, V., Astron. J., 72, 1324 (1967).

  6. 6

    Boynton, P. E., Groth, E. J. III, Partridge, R. B., and Wilkinson, D. T., IAU Circ. No. 2179 (1969).

  7. 7

    Richards, D. W., Pettengill, G. H., Roberts, J. A., and Counselman, C. C. III, IAU Circ. No. 2181 (1969).

  8. 8

    Goldwire, H. C., and Michel, F. C., Astrophys. J. Lett., 156, L111 (1969).

  9. 9

    Ruderman, M., Nature, 225, 838 (1970).

  10. 10

    Hills, J. G., Nature, 226, 730 (1970).

  11. 11

    Sutherland, P., Baym, G., Pethick, C., and Pines, D., Nature, 225, 353 (1970).

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HØG, E., LOHSEN, E. Irregularities in the Crab Pulsar Wobble. Nature 227, 1229–1230 (1970) doi:10.1038/2271229a0

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