Radio Observations of the Crab Nebula during a Lunar Occultation

Nature ◽  
1964 ◽  
Vol 203 (4941) ◽  
pp. 171-173 ◽  
Author(s):  
B. H. ANDREW ◽  
N. J. B. A. BRANSON ◽  
D. WILLS
Keyword(s):  
Crab Nebula ◽  
Radio Observations ◽  
Lunar Occultation ◽  
The Crab Nebula

scholarly journals Radio observations of the lunar atmosphere

1959 ◽  
Vol 9 ◽  
pp. 47-49
Author(s):  
B. Elsmore
Keyword(s):  
Radio Source ◽  
Crab Nebula ◽  
Large Diameter ◽  
Radio Observations ◽  
Radio Brightness ◽  
Lunar Occultation ◽  
Terrestrial Atmosphere ◽  
Accurate Position ◽  
The Crab Nebula

Observations of a lunar occultation of a radio source may provide information concerning both the distribution of radio “brightness” across the source and its accurate position. For sources of which these results are already fairly well known, observations at long wavelengths may be used to derive the density of the lunar atmosphere [1]. During recent years two such occultations have been observed at Cambridge: one, the occultation of IC 443, the large-diameter radio source in the constellation of Gemini, from which the density of the lunar atmosphere was estimated to be less than 10–12 of that of the density of the terrestrial atmosphere [2] and [3]; and two, the occultation of the Crab nebula on 1956 January 24 [4].

scholarly journals Radio Observations of a Lunar Occultation of the Crab Nebula

1956 ◽  
Vol 116 (4) ◽  
pp. 380-385 ◽  
Author(s):  
C. H. Costain ◽  
B. Elsmore ◽  
G. R. Whitfield
Keyword(s):  
Crab Nebula ◽  
Radio Observations ◽  
Lunar Occultation ◽  
The Crab Nebula

scholarly journals Radio Observations of the Crab Nebula Pulsar

1971 ◽  
Vol 46 ◽  
pp. 73-83
Author(s):  
F. D. Drake
Keyword(s):  
Multipath Propagation ◽  
Crab Nebula ◽  
Crab Pulsar ◽  
Great Intensity ◽  
Radio Observations ◽  
Radiated Power ◽  
Propagation Effects ◽  
The Crab Nebula

The radio properties of the Crab Nebula pulsar are reviewed. The pulsar lies at the centre of the Crab Nebula and has a period of 33 msec. Its increase in period with time releases an amount of energy which is equal in magnitude to the total radiated power. Instabilities in the period of the Crab pulsar have been discovered with timescales ranging from days to months. The length of the pulse increases at longer wavelengths due apparently to multipath propagation effects. A characteristic of the Crab pulsar is the great intensity of the occasional pulse.

scholarly journals The Magnetic Field of the Crab as Revealed by New, High Resolution, Multi-Band Radio Images

1990 ◽  
Vol 140 ◽  
pp. 79-80
Author(s):  
M. F. Bietenholz ◽  
P. P. Kronberg
Keyword(s):  
Magnetic Field ◽  
High Resolution ◽  
Crab Nebula ◽  
Radio Observations ◽  
Field Orientation ◽  
Magnetic Field Orientation ◽  
The Crab Nebula ◽  
The Magnetic Field ◽  
Made In ◽  
Multi Band

We present and describe recent radio observations of the Crab Nebula, which allow us to determine the magnetic field orientation and depolarization at unprecedented resolution. The observations were made in 1987-1988 using all four configurations of the VLA, at 1410,1515,4625, and 4885 MHz. The resulting maps were all convolved with a clean beam of 1.8″ × 2.0″, elongated in P.A. 80°, and the residuals added back in.

Lunar occultation of the hard X-ray source in the Crab Nebula

Nature ◽  
1975 ◽  
Vol 255 (5508) ◽  
pp. 465-466 ◽  
Author(s):  
Y. FUKADA ◽  
S. HAYAKAWA ◽  
I. KASAHARA ◽  
F. MAKINO ◽  
Y. TANAKA ◽  
...  
Keyword(s):  
Crab Nebula ◽  
X Ray ◽  
Lunar Occultation ◽  
The Crab Nebula

The Crab Nebula - High energy X-ray observation of a lunar occultation

1975 ◽  
Vol 201 ◽  
pp. L15 ◽  
Author(s):  
R. Staubert ◽  
E. Kendziorra ◽  
J. Truemper ◽  
C. Reppin ◽  
J. A. Hoffman ◽  
...  
Keyword(s):  
Crab Nebula ◽  
High Energy ◽  
X Ray ◽  
Lunar Occultation ◽  
The Crab Nebula

High-energy X-ray observations of a lunar occultation of the Crab Nebula

1975 ◽  
Vol 197 ◽  
pp. L83 ◽  
Author(s):  
G. R. Ricker ◽  
S. G. Ryckman ◽  
J. E. Ballintine ◽  
J. P. Doty ◽  
P. M. Downey ◽  
...  
Keyword(s):  
Crab Nebula ◽  
High Energy ◽  
X Ray ◽  
Lunar Occultation ◽  
The Crab Nebula

A Lunar Occultation of the Crab Nebula at 1420 Mc/sec.

1966 ◽  
Vol 71 ◽  
pp. 167 ◽  
Author(s):  
T. Krishnan ◽  
S. H. Zisk ◽  
D. D. Cudaback
Keyword(s):  
Crab Nebula ◽  
Lunar Occultation ◽  
The Crab Nebula
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