J/A+A/474/1093 30GHz flux densities of CJF sources (Lowe+, 2007)
30 GHz flux density measurements of the Caltech-Jodrell flat-spectrum sources
with OCRA-p.
Lowe S.R., Gawronski M.P., Wilkinson P.N., Kus A.J., Browne I.W.A.,
Pazderski E., Feiler R., Kettle D.
<Astron. Astrophys. 474, 1093 (2007)>
=2007A&A...474.1093L 2007A&A...474.1093L
ADC_Keywords: Radio sources
Keywords: astronomical data bases: miscellaneous - radio continuum: galaxies
Abstract:
The aim was to measure the 30-GHz flux densities of the 293 sources in
the Caltech-Jodrell Bank flat-spectrum (CJF) sample. The measurements
are part of an ongoing programme to measure the spectral energy
distributions of flat spectrum radio sources and to correlate them
with the milliarcsecond structures from VLBI and other measured
astrophysical properties.
The 30-GHz data were obtained with a twin-beam differencing radiometer
system mounted on the Torun 32-m telescope. The system has an angular
resolution of 1.2arcmin.
Together with radio spectral data obtained from the literature, the
30-GHz data have enabled us to identify 42 of the CJF sources as
Giga-hertz Peaked Spectrum (GPS) sources. Seventeen percent of the
sources have rising spectra (alpha>0) between 5 and 30GHz.
Description:
30-GHz flux density measurements of the Caltech-Jodrell Bank
flat-spectrum (CJF) sample taken with OCRA-p and the Torun 32-m
telescope.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 67 293 30GHz measurements of the 293 sources in the
CJF sample
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See also:
J/A+AS/135/273 : 408MHz obs. of GPS sources from JVAS survey (Marecki+ 1999)
J/A+A/369/380 : CSS/GPS radio sources VLA observations (Fanti+, 2001)
J/ApJ/589/733 : VLBI polarimetry of CJF sources (Pollack+, 2003)
J/A+A/463/97 : Optical observations of GPS radio sources (Labiano+, 2007)
J/A+A/469/451 : Radio continuum spectra of GPS galaxies (Torniainen+, 2007)
J/A+A/472/763 : Multi-epoch VLBI survey CJF sources (Britzen+, 2007)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- IAU Name of the CJF source according to IAU
convention (HHMM+DDd based on B1950 position)
10- 11 I2 h RAh Right ascension (J2000) (1)
12- 13 I2 min RAm Right ascension (J2000) (1)
14- 20 F7.4 s RAs Right ascension (J2000) (1)
22 A1 --- DE- Declination sign (J2000) (1)
23- 24 I2 deg DEd Declination (J2000) (1)
25- 26 I2 arcmin DEm Declination (J2000) (1)
27- 32 F6.3 arcsec DEs Declination (J2000) (1)
34- 39 F6.3 Jy S5GHz Flux density at 5GHz (2)
40- 45 F6.3 Jy S30GHz Flux density at 30GHz
46- 50 F5.3 Jy e_S30GHz Error in S30GHz
51- 55 F5.2 --- alpha5 Spectral index (1.4-5GHz) (3)
56- 60 F5.2 --- alpha30 Spectral index (5-30GHz)
61- 67 A7 --- Class Morphology based upon the appearance in VLBI
maps at 1.4 and 5GHz (4)
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Note (1): The positions are taken from measurements at 5GHz reported by
Taylor et al. (1996ApJS..107...37T 1996ApJS..107...37T).
Note (2): The flux density at 5GHz comes from the original CJF measurements
of Taylor et al. (1996ApJS..107...37T 1996ApJS..107...37T).
Note (3): Where 1.4GHz measurements did not exist in Taylor et al.
(1996ApJS..107...37T 1996ApJS..107...37T), spectral indices were calculated between
2.727 and 5GHz using data from Kuehr et al. (1981AJ.....86..854K 1981AJ.....86..854K).
Note (4): Morphology code as follows:
c = compact
cj = core-jet
d = double
cso = compact symmetric object
mso = medium symmetric object
t = triple
g = gravitational lens
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Acknowledgements:
Stuart Lowe, Stuart.Lowe(at)manchester.ac.uk
(End) Stuart Lowe [JBCA/Manchester Univ.], Patricia Vannier [CDS] 25-Oct-2007