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International Astronomical Union Colloquium, 2000
Abstract Observations over an eight month period from July 1997 to March 1998 show echoes following the radio pulses, and unusual changes in dispersion measure. We interpret this remarkable and complex event as refraction and dispersion in an ionised shell in the outer part of the Crab Nebula.
F. Graham Smith, A.G. Lyne
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Abstract Observations over an eight month period from July 1997 to March 1998 show echoes following the radio pulses, and unusual changes in dispersion measure. We interpret this remarkable and complex event as refraction and dispersion in an ionised shell in the outer part of the Crab Nebula.
F. Graham Smith, A.G. Lyne
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Crab Pulsar Observations with AquEYE
AIP Conference Proceedings, 2009As is well known, the Crab pulsar displays a light curve with a characteristic double peak profile having a period of 33 milliseconds. Its pulse profile has been extensively monitored by several authors; it is also used for testing high‐speed photon counters. We have studied the optical light curve of the Crab pulsar by means of a novel photon counting
C. Germanà +10 more
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Nature, 1969
WE have attempted optical observations of the Vela pulsar PSR 0833–45 (ref. 1) and measurement of linear and circular polarization in the Crab pulsar NP 0532 (refs. 2, 3, and unpublished work of R. Lynds, S. P. Maran and D. E. Trumbo) with a 74 inch telescope.
K. C. FREEMAN +3 more
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WE have attempted optical observations of the Vela pulsar PSR 0833–45 (ref. 1) and measurement of linear and circular polarization in the Crab pulsar NP 0532 (refs. 2, 3, and unpublished work of R. Lynds, S. P. Maran and D. E. Trumbo) with a 74 inch telescope.
K. C. FREEMAN +3 more
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Frontiers of Physics, 2020
There are some similarities between bursts of repeating fast radio bursts (FRBs) and giant pulses (GPs) of pulsars. To explore possible relations between them, we study the cumulative energy distributions of these two phenomena using the observations of ...
Fen Lyu +8 more
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There are some similarities between bursts of repeating fast radio bursts (FRBs) and giant pulses (GPs) of pulsars. To explore possible relations between them, we study the cumulative energy distributions of these two phenomena using the observations of ...
Fen Lyu +8 more
semanticscholar +1 more source
Physical Review Letters, 1969
Position measurements of the Crab nebula pulsar NPO527 made with a split-beam antenna yield the position (1950) $\ensuremath{\alpha}={05}^{\mathrm{h}}{26}^{\mathrm{m}}{10}^{\mathrm{S}}\ifmmode\pm\else\textpm\fi{}{40}^{\mathrm{S}}$, $\ensuremath{\delta}=22\ifmmode^\circ\else\textdegree\fi{}{0}^{\ensuremath{'}}\ifmmode\pm\else\textpm\fi{}{30 ...
Edward C. Reifenstein +2 more
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Position measurements of the Crab nebula pulsar NPO527 made with a split-beam antenna yield the position (1950) $\ensuremath{\alpha}={05}^{\mathrm{h}}{26}^{\mathrm{m}}{10}^{\mathrm{S}}\ifmmode\pm\else\textpm\fi{}{40}^{\mathrm{S}}$, $\ensuremath{\delta}=22\ifmmode^\circ\else\textdegree\fi{}{0}^{\ensuremath{'}}\ifmmode\pm\else\textpm\fi{}{30 ...
Edward C. Reifenstein +2 more
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Nature, 1969
BECAUSE of the conjecture that pulsars are neutron stars, which are possibly produced in supernova events, the possible association of pulsars with supernova remnants is of great interest. Staelin and Reifenstein recently reported1 the discovery of two pulsed radio sources near the Crab nebula, which is the remnant of the supernova observed by the ...
J. M. COMELLA +4 more
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BECAUSE of the conjecture that pulsars are neutron stars, which are possibly produced in supernova events, the possible association of pulsars with supernova remnants is of great interest. Staelin and Reifenstein recently reported1 the discovery of two pulsed radio sources near the Crab nebula, which is the remnant of the supernova observed by the ...
J. M. COMELLA +4 more
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Crab Pulsar Optically Identified; Other Pulsars Show Slowdown
Physics Today, 1969Pulsar NP 0532, near the center of the Crab Nebula, pulses optically with the same period as its radio emissions, according to W. John Cocke, Michael J. Disney and Donald J. Taylor of the Steward Observatory (International Astronomical Union Circular No. 2128, 1969).
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Magnetic Field Structure around the Crab Pulsar
Nature, 1971LINEAR polarization observations of the Crab nebula at optical wavelengths indicate that the magnetic field is uniform in direction over a large region (about 0.5 pc) around the pulsar. Observations were made with a completely automatic sky compensated polarimeter-cum-photometer with an S20 photomultiplier and a GG13 filter.
W, Forman, N, Visvanathan
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Long-term evolution of the X-ray flux of the Crab pulsar
Radiation Detection Technology and Methods, 2023Haihui Zhao +9 more
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X-ray Pulsar in the Crab Nebula
Science, 1969X-ray pulsations have been observed in the Crab Nebula at a frequency closely matching the radio and optical pulsations. About 5 percent of the total x-ray power of the nebula appears in the pulsed component. The x-ray pulsations have the form of a main pulse and an interpulse separated by about 12 milliseconds.
G, Fritz +4 more
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