J/MNRAS/384/775 Bright Source Sample of AT20G Survey (Massardi+, 2008)
The Australia Telescope 20-GHz (AT20G) Survey: the Bright Source Sample.
Massardi M., Ekers R.D., Murphy T., Ricci R., Sadler E.M., Burke S.,
De Zotti G., Edwards P.G., Hancock P.J., Jackson C.A., Kesteven M.J.,
Mahony E., Phillips C.J., Staveley-Smith L., Subrahmanyan R., Walker M.A.,
Wilson W.E.
<Mon. Not. R. Astron. Soc., 384, 775-802 (2008)>
=2008MNRAS.384..775M 2008MNRAS.384..775M
ADC_Keywords: Surveys ; Radio sources ; Polarization
Keywords: surveys - galaxies: active - cosmic microwave background -
radio continuum: general
Abstract:
The Australia Telescope 20-GHz (AT20G) Survey is a blind survey of the
whole southern sky at 20GHz (with follow-up observations at 4.8 and
8.6GHz) carried out with the Australia Telescope Compact Array from
2004 to 2007.
The Bright Source Sample (BSS) is a complete flux-limited subsample of
the AT20G Survey catalogue comprising 320 extragalactic (|b|>1.5°)
radio sources south of DE=-15° with S20GHz>0/50Jy. Of these, 218
have near simultaneous observations at 8 and 5GHz.
In this paper we present an analysis of radio spectral properties in
total intensity and polarization, size, optical identifications and
redshift distribution of the BSS sources.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 79 11 Follow-up observations
table2.dat 141 320 The AT20G BSS
table3.dat 91 320 The AT20G BSS: polarization data
notes.dat 80 107 Individual notes
refs.dat 79 67 References
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See also:
J/MNRAS/371/898 : Extragalactic radio sources selected at 20GHz (Sadler+, 2006)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1 A1 --- Ep Epoch reference number
3- 5 I3 deg DEl Lower value of declination range
7- 9 I3 deg DEu upper value of declination range
11- 15 I5 MHz Freq1 First central frequency
17- 21 I5 MHz Freq2 Second central frequency
24- 27 A4 --- Conf Array configuration
30- 32 I3 m sspa shortest spacing
35- 43 A9 arcsec Beam1 Beam size (arcsec)
46- 54 A9 arcsec Beam2 Beam size (arcsec)
56- 75 A20 --- Dates Dates of observation
77- 79 A3 --- Reason [CORM, ] Reasons of observation (1)
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Note (1): Reasons as follows:
C = to confirm candidate source
O = to observe source at 5 and 8 GHz
R = to repeat previous bad-quality observations
M = observation in which we observed the very extended sources
in mosaic mode
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [MEM2008] Sequential number
4 A1 --- n_[MEM2008] [*] indicates a note in notes.dat
6- 7 I2 h RAh Right ascension (J2000)
9- 10 I2 min RAm Right ascension (J2000)
12- 16 F5.2 s RAs Right ascension (J2000)
18 A1 --- DE- Declination sign (J2000)
19- 20 I2 deg DEd Declination (J2000)
22- 23 I2 arcmin DEm Declination (J2000)
25- 28 F4.1 arcsec DEs [0/60] Declination (J2000)
30 A1 --- l_S20 Limit flag on S20
31- 35 F5.2 Jy S20 Flux density at 20GHz
37- 40 F4.2 Jy e_S20 ? rms uncertainty on S20
42- 45 F4.2 Jy S8.6 ? Flux density at 8GHz
47- 50 F4.2 Jy e_S8.6 ? rms uncertainty in S8.6
52- 56 F5.2 Jy S4.8 ? Flux density at 5GHz
58- 61 F4.2 Jy e_S4.8 ? rms uncertainty on S4.8
63- 68 F6.3 Jy S1.4 ? NVSS flux density at 1.4GHz
70- 74 F5.3 Jy e_S1.4 ? rms uncertainty on S1.4
76- 82 F7.3 Jy S0.843 ? SUMSS flux density at 843MHz
84- 88 F5.3 Jy e_S0.843 ? rms uncertainty on S0.843
90- 94 F5.3 --- z ?=- Redshift
96- 99 A4 --- r_z Redshift references, detailed in refs.dat
101-105 F5.2 mag Bjmag ? Bj magnitude
107 A1 --- OptID [GQ] Optical ID as Galaxy (G) or QSO (Q)
109 A1 --- Ep1 [1-6.] Epoch of the 20-GHz observations (2)
110 A1 --- Ep2 [1-6.] Second epoch of the 20-GHz, 8GHz and
5GHz observations (2)
111 A1 --- SpS [FIPSU.] Spectral shape flag (3)
112 A1 --- G [G.] Galactic position (|b|<10°)
113 A1 --- Ep8 [1-5.] Epoch of observation at 8GHz (2)
114 A1 --- Ep5 [1-5.] Epoch of observation at 5GHz (2)
115 A1 --- Ex [EM.] extendedness flag (5)
116 A1 --- AT [C.] C: source listed in the AT calibrator
manual
119-137 A19 --- AName Altermative name (PMN, PKS, NVSS, ...)
139-141 I3 --- WMAP ? WMAP (Bennett et al., 2003 J/ApJS/148/97)
identification number
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Note (2): Detailed in table1.dat
Note (3): Spectral shape flag as follows:
F = flat
I = inverted
P = peaked
S = steep
U = upturning
Note (5): Extendedness flag as follows:
E = the source is extended at 20 GHz,
M = it has been observed in the mosaic mode. The flux density for
the M sources corresponds to the integrated flux density of the
source in the mosaic area
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [MEM2008] Sosurce sequential number
5- 6 I2 h RAh Right ascension (J2000)
8- 9 I2 min RAm Right ascension (J2000)
11- 15 F5.2 s RAs Right ascension (J2000)
17 A1 --- DE- Declination sign (J2000)
18- 19 I2 deg DEd Declination (J2000)
21- 22 I2 arcmin DEm Declination (J2000)
24- 27 F4.1 arcsec DEs [0/60] Declination (J2000)
29 A1 --- l_P20 Limit flag on P20
30- 34 F5.3 Jy P20 ? Integrated polarized flux at 20GHz
36- 40 F5.3 Jy e_P20 ? rms uncertainty on P20
42- 45 F4.1 % m20 ? Fractional polarization at 20 GHz
47- 49 I3 deg PA20 [-90/90]? Polarization angle at 20 GHz
51 A1 --- l_P8.6 Limit flag on P8.6
52- 56 F5.3 Jy P8.6 ? Integrated polarized flux at 8.6GHz
58- 62 F5.3 Jy e_P8.6 ? rms uncertainty on P8.6
64- 66 F3.1 % m8.6 ? Fractional polarization at 8 GHz
68- 70 I3 deg PA8.6 [-90/90]? Polarization angle at 8 GHz
72 A1 --- l_P4.8 Limit flag on P4.8
73- 77 F5.3 Jy P4.8 ? Integrated polarized flux at 5GHz
79- 83 F5.3 Jy e_P4.8 ? rms uncertainty on P4.8
85- 87 F3.1 % m4.8 ? Fractional polarization at 5 GHz
89- 91 I3 deg PA4.8 [-90/90]? Polarization angle at 5 GHz
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [MEM2008] Source sequential number
5- 80 A76 --- Text Text of the note
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Ref Reference code
6- 24 A19 --- bibCode BibCode
26- 51 A26 --- Aut Author's name
53- 79 A27 --- Com Comments
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 16-Jun-2008