Crab pulsar: enhanced optical emission during giant radio pulses
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Collins, Susan; Shearer, Andy; Stappers, Ben; Barbieri, Cesare; Naletto, Giampiero; Zampieri, Luca; Verroi, Enrico; Gradari, Serena (2011). Crab pulsar: enhanced optical emission during giant radio pulses. Proceedings of the International Astronomical Union (285),
Although optical pulsar studies have been limited to a few favoured objects, the observation of pulsars at optical wavelengths provides an opportunity to derive a number of important pulsar characteristics, including the energy spectrum of the emitting electrons and the geometry of the emission zone. These parameters will be vital for a comprehensive model of pulsar emission mechanisms. Observations of the Crab pulsar with the high-time-resolution photon-tagging photometer IquEYE show an optical-radio delay of similar to 178 mu s. Incorporating simultaneous Jodrell Bank radio observations suggested a correlation between giant radio pulses and enhanced optical pulses for this pulsar, thus offering possible evidence for the reprocessing of radio photons.