Discovery of Optical Signals from Pulsar NP 0532

  title={Discovery of Optical Signals from Pulsar NP 0532},
  author={W. J. Cocke and Michael John Disney and D. J. Taylor},
Strong light flashes have been detected from the fast pulsar in the Crab Nebula. 

Further Observations of the Crab Nebula Optical Pulsar

Further optical studies of the Crab Nebula pulsar have revealed the unusual shape of the light curve as a function of colour and polarization.

X-Ray and Optical Observations of the Pulsar NP 0532 in the Crab Nebula

The existence of a strong pulsed X-ray signal from the pulsar NP 0532 is confirmed. The phases and the shapes of the X-ray and optical pulses are compared.

Mechanism for the Delay of Polarization Minima in the Optical Pulsar NP 0532

EVER since its discovery1 the optical pulsar NP 0532 in the Crab Nebula has been much of a mystery. The sharply peaked, asymmetrical pulses, the high degree of linear polarization2 at an angle which

Optical Polarization Measurements of Pulsar NP 0532

The linear polarization is of the order of 15 per cent and is variable, and the circular polarization is less than 5 percent.

Possible Mechanism for the Pulsar Radio Emission

An attempt to account quantitatively for the pulse width, polarization and spectrum of the pulses.

The Crab pulsar and its pulsar-wind nebula in the optical and infrared

Aims. We investigate the emission mechanism and evolution of pulsars that are associated with supernova remnants. Methods: We used imaging techniques in both the optical and near infrared, using im

Electromagnetic Spectrum of NP 0532

THE discovery of optical1 and X-ray2–5 emission from the Crab Nebula pulsar NP 0532 greatly extends, for this particular object at least, the spectral band to be accounted for by emission mechanisms.

The evolution and structure of pulsar wind nebulae

AbstractPulsars steadily dissipate their rotational energy via relativistic winds. Confinement of these outflows generates luminous pulsar wind nebulae, seen across the electromagnetic spectrum in ...

Crab and Vela Pulsars

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PSR 0833–45 (ref. 1) and measurement of linear and circular polarization in the Crab pulsar NP 0532 (refs. 2, 3, and unpublished work of R.



Crab Nebula Pulsar NP 0532

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

Pulsating Radio Sources near the Crab Nebula

Two new pulsating radio sources, designated NP 0527 and NP 0532, were found near the Crab Nebula and could be coincident with it. Both sources are sporadic, and no periodicities are evident. The

Lunar Occultation of X-ray Emission from the Crab Nebula

The x-ray flux from the Crab Nebula was observed during a lunar occultation on 7 July 1964 and the source appears to extend over a volume about 1 light-year in diameter.

Angular Size and Flux Density of the Small Source in the Crab Nebula at 81.5 Mc/s

THE existence of a source in the Crab Nebula with an angular diameter of less than 1 sec of arc has been revealed by observations of interplanetary scintillation at a frequency of 38 Mc/s (ref. 1).

Position of the Low Frequency Radio Source in the Crab Nebula

RECENT radio observations of the Crab Nebula1–3 have demonstrated the existence of a component of small angular diameter which contributes a significant fraction of the total flux density at

Extrasolar X-Ray Sources

The high excitation temperatures of the solar corona were established a generation ago by optical spectroscopy. Atomic lines in the soft X-ray region were among the first results sought-and

Motions and Structure of the Filamentary Envelope of the Crab Nebula

Proper motions have been measured for 132 line-emitting filaments in the Crab Nebula on direct plates taken with the 100 and 200-inch telescopes. These motions, if assumed constant and extrapolated

Cooling and detectability of neutron stars.

Surface properties, temperature effects, cooling behavior, and observability of neutron stars have been studied. For this purpose, the opacity of the surface layers is calculated both for a pure iron

Hydrogen and helium abundances in neutron-star atmospheres

An analysis is presented of the burning and diffusion of hydrogen and helium in a neutron-star atmosphere. An initial two-component atmosphere of hydrogen and carbon and of helium and carbon is

The Crab Nebula.