Control of unsettled elements of the main reflector of the ratan 600 radio telescope in flux density measurements for discrete radio sources

1997 ◽  
Vol 40 (11) ◽  
pp. 929-935
Author(s):  
A. M. Botashev ◽  
G. V. Zhekanis ◽  
E. K. Mayorova ◽  
M. G. Mingaliev
Keyword(s):  
Flux Density ◽  
Radio Telescope ◽  
Radio Sources ◽  
Density Measurements ◽  
Main Reflector ◽  
Discrete Radio Sources

scholarly journals Measurements Of The Flux Density Of Discrete Radio Sources At 6 Cm Wavelength

1966 ◽  
Vol 19 (4) ◽  
pp. 577 ◽  
Keyword(s):  
Flux Density ◽  
Radio Telescope ◽  
Power Law ◽  
Radio Sources ◽  
Frequency Range ◽  
Thermal Radio ◽  
Discrete Radio Sources ◽  
Selection Of ◽  
Lower Frequencies

The flux densities of 67 non-thermal radio sources have been measured at a frequency of 5000 Mc/s with the CSIRO 210 ft radio telescope at Parkes. The sources were chosen from the stronger objects in the 3C catalogue (Edge et al. 1959), the CTA and CTD catalogues (Harris and Roberts 1960; Kellermann and Read 1965), and the Parkes catalogue (Bolton, Gardner, and Mackey 1964; Price and Milne 1965; Day et al. 1966). In the selection of sources observed in this program, special emphasis was placed on objects whose spectra at lower frequencies showed significant departures from the usual power law with an index near -0�8. Most of the sources reported here have not been previously measured at wavelengths shorter than 10 cm and thus the present observations extend the frequency range of their spectra by nearly a factor of two.

7.8-GHz Flux Density Measurements of Variable Radio Sources

1972 ◽  
Vol 77 ◽  
pp. 819 ◽  
Author(s):  
William A. Dent ◽  
Gabriel Kojoian
Keyword(s):  
Flux Density ◽  
Radio Sources ◽  
Density Measurements ◽  
Variable Radio

scholarly journals Gain Measurements of Large Aerials Used in Interferometer and Cross?Type Radio Telescopes

1958 ◽  
Vol 11 (1) ◽  
pp. 70 ◽  
Author(s):  
AG Little
Keyword(s):  
Radio Telescope ◽  
Radio Sources ◽  
Radio Telescopes ◽  
Discrete Radio Sources ◽  
Cross Type

A method has been developed for measuring the gain of large interferometer and cross-type radio telescope aerials. Use is made of the strong discrete radio sources, whose intensity need not be known, to allow comparison of the gains of the aerials with that of a standard.

scholarly journals Intraday Variability in Northern Hemisphere Radio Sources

2002 ◽  
Vol 19 (1) ◽  
pp. 14-18 ◽  
Author(s):  
T. P. Krichbaum ◽  
A. Kraus ◽  
L. Fuhrmann ◽  
G. Cimò ◽  
A. Witzel
Keyword(s):  
Flux Density ◽  
Radio Telescope ◽  
Physical Interpretation ◽  
Radio Sources ◽  
Intrinsic Variability ◽  
The Past ◽  
Interstellar Scintillation ◽  
Variability Pattern ◽  
Complex Source ◽  
Intraday Variability

AbstractWe summarise results from flux density monitoring campaigns performed with the 100 m radio telescope at Effelsberg and the VLA during the past 15 yrs. We briefly discuss some of the statistical properties from now more than 40 high declination sources (δ ≥ 30°), which show intraday variability (IDV). In general, IDV is more pronounced for sources with flat radio spectra and compact VLBI structures. For 0917+62, we present new VLBI images which suggest that the variability pattern is modified by the occurrence of new jet components. For 0716+71, we show the first detection of IDV at millimetre wavelengths (32 GHz). For the physical interpretation of the IDV phenomenon, a complex source and frequency dependent superposition of interstellar scintillation and source intrinsic variability should be considered.

scholarly journals 5000 MHz Flux Densities and Spectra for 325 Small-diameter Radio Sources at Low Galactic Latitudes

1975 ◽  
Vol 28 (5) ◽  
pp. 633 ◽  
Author(s):  
JL Caswell ◽  
RF Haynes ◽  
DH Clark
Keyword(s):  
Flux Density ◽  
Small Diameter ◽  
Radio Sources ◽  
Density Measurements

Flux density measurements at 5000 MHz are presented for 325 of the small-diameter sources detected in the Molonglo 408 MHz galactic survey. By investigating the spectra we show that probably between 10 % and 15 % of the sources are galactic and the remainder extragalactic.

Measurements of the flux density of discrete radio sources at centimeter wawelengths. I. Observations at 2695 MHz. (11.3cm).

1968 ◽  
Vol 73 ◽  
pp. 298 ◽  
Author(s):  
K. I. Kellermann ◽  
I. I. K. Pauliny-Toth ◽  
W. C. Tyler
Keyword(s):  
Flux Density ◽  
Radio Sources ◽  
Discrete Radio Sources

15.5-GHz flux-density measurements of variable radio sources

1974 ◽  
Vol 79 ◽  
pp. 1232 ◽  
Author(s):  
W. A. Dent ◽  
J. E. Kapitzky ◽  
G. Kojoian
Keyword(s):  
Flux Density ◽  
Radio Sources ◽  
Density Measurements ◽  
Variable Radio
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