Abstract
NIGHT sky Cerenkov light detectors have recently been successfully used in observations of pulsar CP 1133 (ref. 1) and of the pulsars NP 0532 and NP 0527 (ref. 2). The results are interpreted as measures of the Cerenkov light burst generated in atmospheric showers themselves produced by high energy primary photons (∼ 3 × l012 eV) emitted by the pulsars. An alternative explanation1 is that the nanosecond light pulses originate in the pulsars themselves, and this is supported by the angular distribution of intensity for the pulsars NP 0532 and NP 0527 associated with the Crab Nebula2.
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References
O'Mongain, E. P., Porter, N. A., White, J., Fegan, D. J., Jennings, D. M., and Lawless, B. G., Nature, 219, 1348 (1968).
IAU Circular No. 2130, Jan. 28 (1969).
Cameron, A. G. W., and Maran, S. P., Fourth Texas Symp. Relativistic Astrophys. (in the press).
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ÖGELMAN, H., SOBIESKI, S. Search for Ultra-short Light Pulses from Pulsars. Nature 223, 47–48 (1969). https://doi.org/10.1038/223047a0
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DOI: https://doi.org/10.1038/223047a0
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