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Giant Micropulses from PSR J0437–4715

Published online by Cambridge University Press:  12 April 2016

S. B. Anderson ,
F. A. Jenet ,
V. M. Kaspi ,
T. A. Prince ,
J. S. Sandhu ,
S. C. Unwin  and
José Navarro
S. B. Anderson
Affiliation:
Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, CA
F. A. Jenet
Affiliation:
Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, CA
V. M. Kaspi
Affiliation:
Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, CA
T. A. Prince
Affiliation:
Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, CA
J. S. Sandhu
Affiliation:
Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, CA
S. C. Unwin
Affiliation:
Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, CA
José Navarro
Affiliation:
NRAO, Very Large Array, Socorro, NM

Extract

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Although individual radio pulses from pulsars vary in amplitude from pulse to pulse, their height distribution in general does not extend to amplitudes more than 10 times the mean. Two notable exceptions are the Crab pulsar and PSR B1937+21 (Lundgren 1995, Cognard et al. 1996 and references therein) which occasionally emit single radio pulses that have amplitudes more than 100 times the mean. Here we report on the detection of short time-scale, extremely large amplitude radio pulses from the nearby millisecond pulsar PSR J0437–4715. The events we have observed are distinguished by having peak flux densities in excess of 10 times the average pulse amplitude, and occur only within a very narrow (80 µs) window centered on the main pulse.

Type
Part 4 Radio Properties
Information
International Astronomical Union Colloquium , Volume 160: Pulsars: Problems and Progress , 1996 , pp. 211 - 212
Copyright
Copyright © Astronomical Society of the Pacific 1996

References

Bell, J.F., Bailes, M., Manchester, R.N., Weisberg, J.M. and Lyne, A.G. 1995, ApJ, 440, L81 CrossRefGoogle Scholar
Cognard, I., Shrauner, J.A., Taylor, J.H. and Thorsett, S.E. 1996, ApJ, 457, L81 Google Scholar
Lundgren, S.C. 1995, ApJ, 453, 433 CrossRefGoogle Scholar