J/MNRAS/368/1411 Flat-spectrum symmetric radio sources (Augusto+, 2006)
Flat-spectrum symmetric objects with ∼1kpc sizes. I. The candidates.
Augusto P., Gonzalez-Serrano J.I., Perez-Fournon I., Wilkinson P.N.
<Mon. Not. R. Astron. Soc. 368, 1411 (2006)>
=2006MNRAS.368.1411A 2006MNRAS.368.1411A
ADC_Keywords: Radio sources ; Redshifts
Keywords: galaxies: active - galaxies: evolution - galaxies: jets -
galaxies: statistics - radio continuum: galaxies
Description:
The radio sources listed below were selected from the Jodrell-VLA
Astrometric Survey and the Cosmic-Lens All-Sky Survey (part 1) and
constitute a (non-complete) parent sample for the selection of
flat-spectrum symmetric object candidates (the ones which show
structure, when their VLA-A 8.4GHz data are analysed). The parent
sample contains northern hemisphere objects with 8.4GHz flux
densities greater than 100mJy, galactic latitudes greater than
10 degrees and 1.40-to-4.85GHz spectral indices (when known; if not,
the source is kept in the sample) smaller than 0.50 (flat). The most
relevant properties of the parent sample are listed in the Table.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 73 1743 Parent sample of 1743 flat-spectrum radio sources
table5.dat 122 157 The sample of 157 flat-spectrum
(α4.851.40<0.5) radio sources
refs.dat 114 145 References
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See also:
VIII/17 : The North 20cm Survey (White+ 1992)
VIII/14 : 87GB Catalog of radio sources (Gregory+, 1991)
VIII/74 : SPECFIND Catalog of radio continuum spectra (Vollmer+ 2005)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Name based on J2000.0 position
11- 12 I2 h RAh Right ascension (J2000)
14- 15 I2 min RAm Right ascension (J2000)
17- 23 F7.4 s RAs Right ascension (J2000)
25 A1 --- DE- Delcination sign (J2000)
26- 27 I2 deg DEd Declination (J2000)
29- 30 I2 arcmin DEm Declination (J2000)
32- 37 F6.3 arcsec DEs Declination (J2000)
39 A1 --- l_F1.4GHz Limit flag on F1.4GHz
40- 44 I5 mJy F1.4GHz ? 1.40GHz flux density (or upper limit) from
White & Becker, 1992, Cat. VIII/17
46- 50 I5 mJy F4.85GHz ? 4.85GHz flux density from Gregory & Condon,
1991, Cat. VIII/14
52 A1 --- l_Sp-Index Limit flag on Sp-Index
53- 57 F5.2 --- Sp-Index ? 1.40-to-4.85GHz spectral index
59- 66 F8.6 --- z ? Redshift
69- 71 I3 --- r_z ? Reference for redshift
73 A1 --- Comm [ABCD] Comments (1)
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Note (1): Comments as follows:
A = The redshift must be >1.34 where absorption lines are seen
(Stocke & Rector, 1997ApJ...489L..17S 1997ApJ...489L..17S)
B = This is a gravitational lens system (multiple imaging)
C = This source is also known as 3C273
D = Maybe the redshift is 1.05? (Dallacasa et al., 2000A&A...363..887D 2000A&A...363..887D)
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Name based on J2000.0 position
11- 12 I2 h RAh Right ascension (J2000)
14- 15 I2 min RAm Right ascension (J2000)
17- 23 F7.4 s RAs Right ascension (J2000)
25 A1 --- DE- Declination sign (J2000)
26- 27 I2 deg DEd Declination (J2000)
29- 30 I2 arcmin DEm Declination (J2000)
32- 37 F6.3 arcsec DEs Declination (J2000)
39 A1 --- l_F1.4GHz Limit flag on 1.4GHz
40- 43 I4 mJy F1.4GHz ? 1.40GHz flux density
45- 48 I4 mJy F4.85GHz ? 4.85GHz flux density
50 A1 --- l_Sp-Index Limit flag on Sp-Index
51- 55 F5.2 --- Sp-Index ? 1.40-to-4.85GHz spectral index
57- 60 F4.1 --- Sp-Indext ? Fitted spectral index to the thin part of
the overall sample, αthin
62- 63 A2 --- n_Sp-Indext [13 fvs] Note on Sp-Indext (1)
65- 67 F3.1 --- e_Sp-Indext ? rms uncertainty on Sp-Indext
69 A1 --- l_z [(] Uncertainty flag on z
70- 77 F8.6 --- z ? Redshift
78 A1 --- n_z [abcd] Note on redshift (2)
79 A1 --- --- [/]
80- 84 F5.3 --- z2 ? Second value of redshift
86- 96 A11 --- r_z ? Reference for redshift
98-108 A11 --- Status Comments on the status of the candidate (3)
110-113 A4 --- n_Status Notes on Status (4)
115-122 A8 --- OName Other name
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Note (1): Notes on spectral index as follows:
1 = only one point used
3 = only three points used
s = steepening spectrum from peak
v = variable source
f = flattening of the spectrum at high-ν
Note (2): Notes on Redshift as follows:
a = If the identification is a QSO ∼9arcsec away.
b = The previous redshift measurement (z=0.577) by Perlman et al.
(1998, Cat. J/AJ/115/1253) is very different.
c = This is a galactic star (see text).
d = This is a galactic planetary nebulae (see text).
Note (3): Comments on the status of the candidate as follows:
CSO = compact symmetric objects
CSO? = source still might be an MSO, depending on its linear size
CSO/MSO = confirmed CSO/MSO
MSO = medium symmetric objects
MSO? = source still might be an CSO, depending on its linear size
MERLIN = MERLIN source
MERLIN/VLBI = sources that have adequate structure but lack multifrequency
observations to confirm core location (see text or Augusto et
al. (1998MNRAS.299.1159A 1998MNRAS.299.1159A) for the sources marked with a (55))
OBS = data exist (need processing/interpreting)
OUT = ruled out, see why in text or in Augusto et al.
(1998MNRAS.299.1159A 1998MNRAS.299.1159A) for the sources marked with a (55)
VLBI = VLBI source
? = the cases that will need observations in the future for the
first step in the classification of their structure
Note (4): Notes as follows:
(S) = see table2/Sect. 2.3 for more details
(t) = see text for more details
(55) = Data from Augusto et al. (1998MNRAS.299.1159A 1998MNRAS.299.1159A)
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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- 3 I3 --- Ref Reference number
5- 23 A19 --- BibCode BibCode
25- 50 A26 --- Aut Author's name
51-114 A64 --- Com Comments
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Acknowledgements: Pedro Augusto, augustp(at)uma.pt
References:
Augusto et al., 1998MNRAS.299.1159A 1998MNRAS.299.1159A
Augusto et al., 1999Ap&SS.261..261A 1999Ap&SS.261..261A
Augusto et al., 1999NewAR..43..663A 1999NewAR..43..663A
(End) Pedro Augusto [Univ. da Madeira], Patricia Vannier [CDS] 12-Jan-2006