Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...254l..35b&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 254, Mar. 15, 1982, p. L35-L39. Research supported by the Alexander-
Astronomy and Astrophysics
Astrophysics
15
Pulsars, Temporal Resolution, Micropulsations, Pulsar Magnetospheres, Radiant Flux Density, Relativistic Electron Beams
Scientific paper
PSR 1133 + 16 was observed at 1.72 GHz with the 100m telescope at Effelsberg. Ultrashort intensity variations with time scales occasionally as short as 2.5 microseconds and flux densities of 300-500 Jy were detected. A statistical test is described which was done to determine the significance of short time scale fluctuations. The 100 ns time resolution was achieved by applying a dispersion removal filter before detection, but no significant unresolved pulses were discovered. Because of energy density arguments, a large corotational Lorentz factor greater than 20 would have to be adopted in order to interpret the observed microsecond duration emission as a result of relativistic beaming at the velocity of the light cylinder. The value would likely be too large, however, to ensure corotation of the magnetosphere with the pulsar.
Bartel Norbert
Hankins Timothy H.
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