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Studies of radio sources at 159 Mc/s

Published online by Cambridge University Press:  14 August 2015

S. Archer ,
J. E. Baldwin ,
D. O. Edge ,
B. Elsmore ,
P. A. G. Scheuer  and
J. R. Shakeshaft
S. Archer
Affiliation:
Mullard Radio Astronomy Observatory, Cavendish Laboratory Cambridge, England
J. E. Baldwin
Affiliation:
Mullard Radio Astronomy Observatory, Cavendish Laboratory Cambridge, England
D. O. Edge
Affiliation:
Mullard Radio Astronomy Observatory, Cavendish Laboratory Cambridge, England
B. Elsmore
Affiliation:
Mullard Radio Astronomy Observatory, Cavendish Laboratory Cambridge, England
P. A. G. Scheuer
Affiliation:
Mullard Radio Astronomy Observatory, Cavendish Laboratory Cambridge, England
J. R. Shakeshaft
Affiliation:
Mullard Radio Astronomy Observatory, Cavendish Laboratory Cambridge, England

Extract

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Two years ago the Cambridge 4-aerial interferometer [1] was adapted to work at a frequency of 159 Mc/s, the resolving power thereby being increased by a factor of four over that at the previous frequency, 81.5 Mc/s. The overall beamwidth at 159 Mc/s is 1.2 degrees by 7 degrees but the beam contains interference fringes in two planes at right angles, so that, by phase-switching between the east pair and the west pair of aerials, sources with angular diameters greater than about 7 minutes of arc are eliminated. A survey using this technique has been carried out by Edge and Shakeshaft and may be called a “small diameter” survey. If the phase-switching receiver is connected between the north pair and the south pair of aerials it is possible to record sources with diameters up to about 1 degree and to measure diameters between 2 and 8 minutes of arc. Archer and Baldwin have used the aerial in this way to make a “large diameter” survey. These two surveys will be referred to collectively as the 3C survey.

Type
Part V Discrete Sources and the Universe
Information
Symposium - International Astronomical Union , Volume 9: Paris Symposium on Radio Astronomy , 1959 , pp. 487 - 491
Copyright
Copyright © Stanford University Press 1959 

References

1. Ryle, M., and Hewish, A. Mem. R.A.S. 67, 97, 1955.Google Scholar
2. Mills, B. Y., and Slee, O. B. Aust. J. Phys. 10, 162, 1957.Google Scholar
3. Shakeshaft, J. R., Ryle, M., Baldwin, J. E., Elsmore, B., and Thomson, J. H. Mem. R.A.S. , 67, 106, 1955.Google Scholar
4. Elsmore, B. (In press.) Google Scholar
5. Baldwin, J. E., and Edge, D. O. The Observatory , 77, 139, 1957.Google Scholar
6. Ryle, M., and Scheuer, P. A. G. Proc. Roy. Soc. A. 230, 448, 1955.Google Scholar
7. Bolton, J. G. The Observatory , 76, 62, 1956.Google Scholar
8. Scheuer, P. A. G. Proc. Camb. Phil. Soc. 53, 764, 1957.Google Scholar
9. Edge, D. O., Scheuer, P. A. G., and Shakeshaft, J. R. M.N.R.A.S. 118, 183, 1958.Google Scholar