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Published July 9, 2014 | Accepted Version
Report Open

7.960 MC/S Observations of Radio Sources in the Sydney Catalogue


During March and September 1960, observations were made with the Caltech interferometer of 739 sources listed in the two catalogues of Mills, Slee and Hill^1,^2. The primary purpose of the investigation was to provide this observatory with a 960 Mc/s "finding list" for future measurements of source sizes and precise positions. The area covered in these observations was: 0: -50° to -20° a: 17 to 5 hours o: -20° to +10° a: O to 24 hours. In general, the observations were restricted to sources in the MSH catalogues whose flux density at 86 Mc/s was greater than 15 x l0^(-26) watts m^-2 (c/s)^-l. All sources down to this level were examined with the exception of those in the region 18h to 24h, between o^o and -10° . Most sources were observed near transit for at least four or five minutes at the position given in the Sydney catalogues. This allowed us to observe one 10-degree declination zone each night. The flux density of each source was measured relative to the standard source Hydra A ( 09-14), which was observed each night when possible. When Hydra A was not available, 22-11 was used as a secondary calibrator. All observations were made at night to avoid effects of solar radiation.

Additional Information

We wish to express our appreciation to Drs. Mills, Slee, and Hill who kindly provided us with the latest results of their survey in advance of publication . We are grateful to Professor J . G. Bolton for his constant guidance throughout the course of this program . We would also like to thank Dr. D. Morris and Mr. J. F . Bartlett for their assistance during the observations, Mr. A. T. Moffet for the use of unpublished results, and Mr . V. Radhakrishnan for his comments on the manuscript . This work was performed under U. S . Office of Naval Research Contract Nonr 220(19).

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Accepted Version - 960_MCS_observations_of_radio_sources_in_the_Sydney_catalogue.pdf


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January 13, 2024