Abstract
THE pulse emission from pulsars is usually confined to a window having a width of a few per cent of the pulsar period. Seven out of the 149 known pulsars, however, exhibit secondary pulses known as interpulses1 which follow the relatively stronger main pulses by about half of the pulsar period. While it seems that only a few pulsars have observable interpulses, not all of the known pulsars have been carefully examined for this phenomenon. This is mainly because once a pulsar has been discovered, observers tend to concentrate on studies of the pulse window rather than the whole pulsar period. Consequently it would be statistically incorrect to compare the fraction of pulsars known to have interpulses with the fraction predicted by a proposed pulsar model. In order to check this possibility we conducted an interpulse search on the pulsars that are visible from Jodrell Bank. We report here the results of this search in which one new interpulse was discovered. These observations also revealed the presence of weak emission from regions other than the main pulse and interpulse windows in the cases of three pulsars.
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CADY, E., RITCHINGS, R. Pulsar interpulses and other off-pulse emission. Nature 269, 126–127 (1977). https://doi.org/10.1038/269126a0
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DOI: https://doi.org/10.1038/269126a0
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