J/MNRAS/377/430 Jodrell Bank Flat-spectrum radio sample (Mckean+, 2007)
The Cosmic Lens All-Sky Survey parent population.
I. Sample selection and number counts.
Mckean J.P., Browne I.W.A., Jackson N.J., Fassnacht C.D., Helbig P.
<Mon. Not. R. Astron. Soc., 377, 430-440 (2007)>
=2007MNRAS.377..430M 2007MNRAS.377..430M
ADC_Keywords: Surveys ; Radio sources
Keywords: surveys - galaxies: active - radio continuum: galaxies
Abstract:
We present the selection of the Jodrell Bank Flat-spectrum (JBF) radio
source sample, which is designed to reduce the uncertainties in the
Cosmic Lens All-Sky Survey (CLASS) gravitational lensing statistics
arising from the lack of knowledge about the parent population
luminosity function. From observations at 4.86GHz with the Very Large
Array, we have selected a sample of 117 flat-spectrum radio sources
with flux densities greater than 5mJy. These sources were selected in
a similar manner to the CLASS complete sample and are therefore
representative of the parent population at low flux densities. The
vast majority (∼90 per cent) of the JBF sample are found to be compact
on the arcsec scales probed here and show little evidence of any
extended radio jet emission. Using the JBF and CLASS complete samples,
we find the differential number counts slope of the parent population
above and below the CLASS 30-mJy flux density limit to be 2.07±0.02
and 1.96±0.12, respectively.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 117 117 The JBF 4.86-GHz catalogue
table3.dat 81 59 The JBF 8.46GHz VLA data
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See also:
VIII/72 : CLASS survey of radio sources (Myers+, 2003)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [JBF.]
5- 7 I3 --- JBF Identification number, JBF NNN in Simbad
9- 10 I2 h RAh Right ascension (J2000)
12- 13 I2 min RAm Right ascension (J2000)
15- 21 F7.4 s RAs Right ascension (J2000)
23 A1 --- DE- Declination sign (J2000)
24- 25 I2 deg DEd Declination (J2000)
27- 28 I2 arcmin DEm Declination (J2000)
30- 35 F6.3 arcsec DEs Declination (J2000)
37- 41 F5.1 mJy Ipeak Peak surface brightness at 4.86GHz,
in mJy/beam
43- 46 F4.1 mJy e_Ipeak rms uncertainty on Ipeak, in mJy/beam
48- 52 F5.1 mJy Sint Intergated flux density at 4.86GHz
from model fitting to the UV data
54- 57 F4.1 mJy e_Sint rms uncertainty on Sint
59 A1 --- Morph [UE] Unresolved or Extended morphology
61- 70 A10 "YYYY/MM/DD" ObsDate Observation date
72- 75 A4 --- Array Array configuration
77- 80 F4.1 arcsec Size1 Beam size
81 A1 --- --- [x]
82- 85 F4.1 arcsec Size2 Beam size
86 A1 --- --- [,]
88- 92 F5.1 deg PA [-90/90] Position angle
94- 96 I3 uJy noise sigmamap (in uJy/beam)
98-102 F5.1 mJy S1.4GHz NVSS flux density at 1.4GHz within
70" of the JBF position
104-106 F3.1 mJy e_S1.4GHz rms uncertainty on S1.4GHz
108-112 F5.2 --- SI1 Spectral index, alpha4.861.4
114-117 F4.2 --- e_SI1 rms uncertainty on SI1
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Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- --- [JBF.]
5- 7 I3 --- JBF Identification number, JBF NNN in Simbad
9- 10 I2 h RAh Right ascension (J2000)
12- 13 I2 min RAm Right ascension (J2000)
15- 21 F7.4 s RAs Right ascension (J2000)
23 A1 --- DE- Declination sign (J2000)
24- 25 I2 deg DEd Declination (J2000)
27- 28 I2 arcmin DEm Declination (J2000)
30- 35 F6.3 arcsec DEs Declination (J2000)
37- 41 F5.1 mJy Ipeak Peak surface brightness at 8.46GHz,
in mJy/beam
43- 45 F3.1 mJy e_Ipeak rms uncertainty on Ipeak, in mJy/beam
47- 51 F5.1 mJy Sint Intergated flux density at 8.46GHz
from model fitting to the UV data
53- 55 F3.1 mJy e_Sint rms uncertainty on Sint
57- 59 I3 uJy noise σ(map) (in uJy/beam)
61- 65 F5.2 --- SI1 Spectral index, alpha8.461.4
67- 70 F4.2 --- e_SI1 rms uncertainty on SI1
72- 76 F5.2 --- SI2 Spectral index, alpha8.464.86
78- 81 F4.2 --- e_SI2 rms uncertainty on SI2
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 12-Oct-2007