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Spectra of 300 sources [ CATS home ] Back to CATS list ] [ ftp ]

1975AuJPA..38....1Wills

Accurate Spectra of 300 radio sources from the Parkes catalogue: oservational results

Wills, B.J. 1975, AuJPS 38, 1

Abstract

Accurate measurements of relative flux density have been made between frequencies of 468 and 5009 MHz for 300 radio sources selected from Parkes catalogue. The observations, thier analysis and accuracy are described, and the flux densities presented together with thier errors. Excluding the incertainties in scaling these flux densities to an absolute system, rms errors vary from 0.24 Jy and 2.4 % at 635 MHz to 1.8 % at 2700 MHz; uncertainties in "absolute" scaling are thought to be about 45 %. The present flux densities are compared with accurate values published elsewhere. The data have been combined with other puplished flux densities between 10 and 10000 MHz to derive spectra, which are presented graphically. Some sources whose spectra may be useful for flux density calibration are noted. Calibration of Flux density scales These relative intensities were then adjusted to the 'absolute' scale defined by Wills B.J. (1973), Ap.J., 180, 335. The latter scale was derived by comparison of strong sources relative to the absolute spectrum of Cas A, determined from the best measurements avalable in the literature.

It is file, generated from Kuhr'79 (by S.Trushkin 04/97) Table 3 Accurate Parkes flux densities (using the correction factors of flux from Kuhr'79 ) 

--------------------------------------------------------------------------------------------------------
name/freq MHz 465        635         960         1410        2695        2700         5000       5009
--------------------------------------------------------------------------------------------------------
	V * - no in Kuhr'79                                                                                Variable
--------------------------------------------------------------------------------------------------------
0000-17                             3.25 0.14   2.22 0.11                                       0.95 0.07
0002+12                 4.19 0.23   2.75 0.17   2.04 0.10                                       0.74 0.06
0003-00     7.86 0.50   8.05 1.18   5.25 0.13               2.41 0.02   2.37 0.02   1.61 0.12   1.45 0.08



Notes for table 3
additional measurements

  source      flux +-  at 580MHz
  0008-42     6.36 0.34
  0403-13     6.33 0.34
  0438-43     8.56 0.28
  0440-00     2.15 0.34
  0445-22     3.86 0.30
  0518+16    16.00 0.46
  0518-45   136.00 3.50
  0521-36    30.62 0.40
  0624-05    35.24 0.88
  0625-35     8.38 0.35
  0637-75     6.61 0.32
  1648+05   119.20 1.60
  1717-00   110.10 2.50
  1932-46    29.72 0.51
  1934-63     9.88 0.39
  2012+23    34.69 0.71
  2111-25     3.69 0.30