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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