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OBSERVATIONS OF THE OWENS VALLEY RADIO OBSERVATORY CALIFORNIA INSTITUTE OF TECHNOLOGY PASADENA, CALIFORNIA 1963. 4. ACCURATE MEASUREMENT OF THE DECLINATIONS OF RADIO SOURCES.
The two 90-foot steerable paraboloids of the Owens Valley Radio Observatory were used as a two-element interferometer at 960 mc with various separations along a north-south baseline to measure accurately the declinations of a number of radio sources, most of which were of small diameter. The measured values of declination are tabulated for 110 sources with right ascen sions between 0 hours and 14 hours 10 minutes. The standard errors of the measured values range from = 2.6 seconds of arc to = 46 seconds of arc with an average of = 13 seconds of arc. A discussion of the sources of error is included.
Observations of the Owens Valley Radio Observatory, California Institute of Technology Pasadena, California. a Discussion of Galaxies Identified with Radio Sources
A description is given of the optical forms of the identified extragalactic radio sources for which satisfactory plate material is available. These forms fall into two general categories: (1) weak sources, having luminosities ranging between 10 to the 38th power- 10 to the 40th power ergs/sec radiated power; and (2) strong sources, having luminosities greater than 10 to the 40th power ergs/sec. The spiral galaxies obsereed to be radio sources are in the weak source category. (Author).
Publications of the Owens Valley Radio Observatory, California Institute of Technology, Pasadena, California. Volume 1, Number 1. a Compilation of Radio Source Flux Densities
In a recent paper the spectra of 242 galactic and extragalactic radio sources were discussed. The flux densities which were used to determine these spectra are tabulated. They are taken from an extensive set of observations made with an interferometer at 475, 710, 958, 1420 and 2841 Mc/s and from published results of observations made at other observatories over a wide range of frequencies. (Author).
Parsec-Scale Radio Jets
Quasars and active galaxies are the most powerful emitters of radiation in the universe. Modern radio telescope arrays have shown that the ultimate energy source resides in the central few parsecs of the galactic nucleus, and powers the emitting regions by way of two oppositely-directed relativistic jets of energy. This volume presents the latest observations and theories of these remarkable objects. Topics discussed include superluminal motions, the physics of jets and shock fronts in jets, related optical observations, and cosmic evolution. Particular attention is given to the "unified theories," which attempt to show that many of the phenomena in powerful extragalactic objects are different aspects of a single, basic mechanism; the main difference in their appearance is a result of their different orientation with respect to the observer.
The New Astronomy: Opening the Electromagnetic Window and Expanding our View of Planet Earth
This is an unusual book, combining as it does papers on astrobiology, history of astronomy and sundials, but—after all—Woody Sullivan is an unusual man. In late 2003 I spent two fruitful and enjoyable months in the Astronomy Department at the University of Washington (UW) working on archival material accumulated over the decades by Woody, for a book we will co-author with Jessica Chapman on the early development of Australian astronomy. The only serious intellectual distraction I faced during this period was planning for an IAU colloquium on transits of Venus scheduled for June 2004 in England, where I was down to present the ‘Cook’ paper. I knew Woody was also interested in transits (and, indeed, anything remotely connected with shadows—see his paper on page 3), and in discussing the Preston meeting with him it transpired that his 60th birthday was timed to occur just one week later. This was where the seed of ‘Woodfest’ began to germinate. Why not invite friends and colleagues to join Woody in Seattle and celebrate this proud event? I put the idea to Woody and others at UW, they liked it, and ‘Woodfest’ was born.
