Abstract
PULSAR intensity variations may be divided roughly into three classes. There are rapid variations on a time-scale of seconds to minutes which occur simultaneously over a wide range of frequency and must therefore be intrinsic to the source1. On a somewhat longer time-scale there are variations typically over a few minutes to a few hours which correlate only over limited bandwidths. There is strong evidence that they are caused by irregular diffraction in the interstellar medium2,3. Finally, there are variations on a time-scale of days to months4 about which little is known because extended regular observations are required. In this report we present some new results obtained during timing observations carried out on a routine basis over 11 months.
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References
Lyne, A. G., and Rickett, B. J., Nature, 218, 326 (1968).
Scheuer, P. A. G., Nature, 218, 920 (1968).
Rickett, B. J., thesis, Univ. Manchester.
Hewish, A., Bell, S. J., Pilkington, J. D. H., Scott, P. F., and Collins, R. A., Nature, 217, 709 (1968).
Pilkington, J. D. H., Hewish, A., Bell, S. J., and Cole, T. W., Nature, 218, 126 (1968).
Downs, G. S., Morris, jun. G. A., and Reichley, P. E., Nature, 222, 1257 (1969).
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COLE, T., HESSE, H. & PAGE, C. Long Term Variations of Pulsar Intensities. Nature 225, 712–713 (1970). https://doi.org/10.1038/225712a0
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DOI: https://doi.org/10.1038/225712a0
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