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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
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:

       FileName      Lrecl  Records   Explanations

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


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

   Bytes Format Units   Label     Explanations

   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)

Note (1): Comments as follows:
      A = The redshift must be >1.34 where absorption lines are seen
          (Stocke & Rector, 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)


Byte-by-byte Description of file: table5.dat

   Bytes Format Units   Label     Explanations

   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

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) 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) 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)


Byte-by-byte Description of file: refs.dat

   Bytes Format Units   Label     Explanations

   1-  3  I3    ---     Ref       Reference number
   5- 23  A19   ---     BibCode   BibCode
  25- 50  A26   ---     Aut       Author's name
  51-114  A64   ---     Com       Comments


Acknowledgements: Pedro Augusto, augustp(at)uma.pt


References:
    Augusto et al., 1998MNRAS.299.1159A
    Augusto et al., 1999Ap&SS.261..261A
    Augusto et al., 1999NewAR..43..663A
(End)    Pedro Augusto [Univ. da Madeira], Patricia Vannier [CDS]    12-Jan-2006