J/MNRAS/379/1442 Multifrequency observations of 9C sources (Waldram+, 2007)
Some estimates of the source counts at Planck Surveyor frequencies,
using the 9C survey at 15 GHz.
Waldram E.M., Bolton R.C., Pooley G.G., Riley J.M.
<Mon. Not. R. Astron. Soc., 379, 1442-1452 (2007)>
=2007MNRAS.379.1442W 2007MNRAS.379.1442W
ADC_Keywords: Surveys ; Radio sources
Keywords: surveys - galaxies: evolution - cosmic microwave background -
radio continuum: general
Abstract:
We have used multifrequency follow-up observations of a sample of
extragalactic sources from the 9C survey at 15GHz to make deductions
about the expected source population at higher radio frequencies, such
as those in the lower frequency bands of the Planck Surveyor
satellite. In particular, we have made empirical estimates of the
source counts at 22, 30, 43 and 70GHz and compared these with both
known data and current theoretical predictions. We have also made an
estimate of the count at the Atacama Large Millimeter Array (ALMA)
frequency of 90GHz, with a view to assessing the possible population
of point sources available for the phase calibration of that
instrument.
Description:
We assembled a flux-limited sample of 121 sources, complete to 25mJy
at 15GHz, from three areas of the 9C survey. All the sources had a
complete set of simultaneously measured flux densities at frequencies
of 1.4, 4.8, 15.2, 22 and 43GHz apart from 11 of them, for which some
observations were missing.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 45 110 The 110 sources in our sample with their
simultaneous flux densities at 1.4, 4.8, 15.2,
22 and 43GHz
--------------------------------------------------------------------------------
See also:
J/MNRAS/342/915 : 9C survey at 15GHz (Waldram+, 2003)
J/MNRAS/354/485 : Radio flux of 15GHz 9C survey (Bolton+, 2004)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Seq Sequential number
5- 14 A10 --- 9C Source 9C name (JHHMM+DDMM)
16- 21 F6.1 mJy S1.4GHz Flux density at 1.4GHz
23- 27 F5.1 mJy S4.8GHz Flux density at 4.8GHz
29- 33 F5.1 mJy S15.2GHz Flux density at 15.2GHz
35- 39 F5.1 mJy S22GHz Flux density at 22GHz
41- 45 F5.1 mJy S43GHz Flux density at 43GHz
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 21-Dec-2007