scholarly journals High Resolution Maps with the VLA

1983 ◽  
Vol 103 ◽  
pp. 69-78
Author(s):  
R. C. Bignell
Keyword(s):  
New Mexico ◽  
High Resolution ◽  
Radio Astronomy ◽  
Full Time ◽  
Large Array ◽  
Astronomy Observatory ◽  
Very Large Array ◽  
Radio Astronomy Observatory ◽  
Time Operation

The Very Large Array is a radio picture making instrument operated by the National Radio Astronomy Observatory in Socorro, New Mexico. The array, which has been in full time operation for more than 2 1/2 years, operates at four main wavelengths, 1.3, 2.0, 6.0 and 20 cm with achievable resolutions of .05, .08, .25 and 0.8 arc seconds respectively.

scholarly journals Future Spectral Line Research with the VLA

1980 ◽  
Vol 87 ◽  
pp. 627-629
Author(s):  
K. J. Johnston
Keyword(s):  
New Mexico ◽  
Spectral Line ◽  
Radio Astronomy ◽  
Molecular Species ◽  
Large Array ◽  
Astronomy Observatory ◽  
Very Large Array ◽  
Radio Astronomy Observatory ◽  
Optical Telescopes

The Very Large Array (VLA) is presently being constructed on the Plains of San Augustine near Socorro, New Mexico by the National Radio Astronomy Observatory. The purpose for which this instrument is being constructed is to produce “radio images” of resolution comparable to that of large optical telescopes. There have already been several “test” observations, some successful, using the partially completed instrument to study the molecular species of OH, H2O, and NH3 with wide bandwidths (200-1500 kHz).

scholarly journals Upper Limits on Sub-Arcminute Fluctuations in the CBR

1992 ◽  
Vol 9 ◽  
pp. 333-334
Author(s):  
R. B. Partridge
Keyword(s):  
New Mexico ◽  
Radio Astronomy ◽  
Angular Resolution ◽  
Aperture Synthesis ◽  
Large Array ◽  
Astronomy Observatory ◽  
Very Large Array ◽  
Radio Astronomy Observatory ◽  
Upper Limits

The use of aperture synthesis allows one to search for fluctuations in the CBR on angular scales below 1 arcminute. I report here tentative results of an experiment carried out with E. B. Fomalont, R. Windhorst and J. Lowenthal using the Very Large Array of the National Radio Astronomy Observatory in New Mexico. We used the instrument in its tightest configuration and at a wavelength of 3.6 cm; the corresponding angular resolution was ~10”. We were able to set limits on fluctuations in the CBR on a range of angular scales, 10”-90”, and these are among the most sensitive upper limits on CBR fluctuations yet published.

scholarly journals The early technical development of the VLA

1991 ◽  
Vol 131 ◽  
pp. 160-164 ◽  
Author(s):  
George W. Swenson
Keyword(s):  
Radio Astronomy ◽  
Technical Development ◽  
Large Array ◽  
Astronomy Observatory ◽  
University Of Illinois ◽  
Very Large Array ◽  
Radio Astronomy Observatory ◽  
Leave Of Absence ◽  
The University ◽  
Academic Year

In the spring of 1964, having qualified for a sabbattical leave from the University of Illinois and having recently completed two years as Chairman of the Visiting Committee of the National Radio Astronomy Observatory, I inquired of the NRAO staff as to whether a desk and possibly some augmentation of my University half-salary might be available at Green Bank for the following academic year. Instead I was invited to join the staff as a fulltime employee and to take a coordinating role in the development of the “very large array” as Chairman of the Design Committee. The University granted me a year’s leave of absence which eventually stretched to four years.

scholarly journals Comparison of Optical and Radio Positions of Stars

1990 ◽  
Vol 141 ◽  
pp. 513-514
Author(s):  
LV Morrison ◽  
RW Argyle ◽  
Y Requième ◽  
JM Mazurier
Keyword(s):  
Radio Astronomy ◽  
Reference Frames ◽  
Large Array ◽  
Astronomy Observatory ◽  
Very Large Array ◽  
Radio Astronomy Observatory ◽  
Important Link ◽  
Radio Stars

The positions of radio stars measured with respect to the VLBI network of extragalactic sources provides an important link between the optical and extragalactic reference frames. The establishment of this link was brought a stage nearer realization with the publication by Florkowski et al.(1985) of the radio positions of 20 stars measured with the Very Large Array (VLA) of the National Radio Astronomy Observatory, and the publication by Lestrade et al.(1985, 1988) of 10 stars measured with the VLBI network.

scholarly journals The VLA and VLBA at Millimeter Wavelengths

1994 ◽  
Vol 140 ◽  
pp. 41-43
Author(s):  
Edward B. Fomalont
Keyword(s):  
High Resolution ◽  
Radio Astronomy ◽  
Large Array ◽  
Very Large Array ◽  
Millimeter Wavelengths

AbstractAlthough the Very Large Array (VLA) and the Very Large Baseline Array (VLBA) were originally intended as centimeter wavelength instruments, the exciting results from high resolution millimeter radio astronomy over the last ten years have generated interest in pushing these arrays into the millimeter region. This report will describe two aspects of recent development at NRAO: the new capability of the VLA at 7mm wavelength which will be operational in 1994, and the completion of the VLBA with its anticipated use at 7mm and 3.6mm.

A Possible Configuration for the Australian Synthesis Telescope

1977 ◽  
Vol 3 (2) ◽  
pp. 103-105 ◽  
Author(s):  
R. N. Manchester
Keyword(s):  
High Resolution ◽  
Radio Astronomy ◽  
High Sensitivity ◽  
Study Group ◽  
Astronomy Observatory ◽  
Design Study ◽  
Radio Astronomy Observatory ◽  
Array Configuration ◽  
The Past ◽  
National University

The proposal made to ASTEC for an Australian systhesis telescope (AST) is for a high-sensitivity, high-resolution synthesis array to be located at the Australian National Radio Astronomy Observatory, Parkes, and used in conjunction with the existing 64-m antenna at that site as a national facility (Wellington 1976). During the past 18 months a design study group consisting of representatives from the Australian National University, University of Sydney, University of Tasmania and CSIRO has been investigating the design of such an array. This paper reports on one aspect of this design, the array configuration.

scholarly journals A high-resolution 10-centimetre survey of the galactic centre region and spectral characteristics of the region

1964 ◽  
Vol 20 ◽  
pp. 168-172
Author(s):  
B. F. C. Cooper ◽  
R. M. Price
Keyword(s):  
High Resolution ◽  
Radio Astronomy ◽  
Spectral Characteristics ◽  
Galactic Centre ◽  
Astronomy Observatory ◽  
Radio Astronomy Observatory ◽  
Centre Region

The region surrounding the galactic centre has been surveyed with the 210-foot telescope of the Australian National Radio Astronomy Observatory at a wavelength of 10·0 cm. At this wavelength the telescope beamwidth is 6.7 between half-intensity points.

scholarly journals Design, environmental and sustainability constraints of new African observatories: The example of the Mozambique Radio Astronomy Observatory

2013 Africon ◽  
2013 ◽  
Author(s):  
Domingos Barbosa ◽  
Miguel Bergano ◽  
Valerio A. R. M. Ribeiro ◽  
Anita Loots ◽  
Venkatasubramani L. Thondikulam ◽  
...  
Keyword(s):  
Radio Astronomy ◽  
Astronomy Observatory ◽  
Radio Astronomy Observatory
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