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J/MNRAS/302/222     ISO ELAIS 20cm VLA survey regions          (Ciliegi+, 1999)
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A deep VLA survey at 20 cm of the ISO ELAIS survey regions.
       Ciliegi P., McMahon R.G., Miley G., Gruppioni C., Rowan-Robinson M.,
       Cesarsky C., Danese L., Franceschini A., Genzel R., Lawrence A.,
       Lemke D., Oliver S., Puget J.-L., Rocca-Volmerange B.
      <Mon. Not. R. Astron. Soc. 302, 222 (1999)>
      =1999MNRAS.302..222C
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ADC_Keywords: Surveys ; Radio sources
Keywords: surveys - radio continuum: galaxies - radio continuum: general

Abstract:
    We have used the Very Large Array (VLA) in C configuration to carry
    out a sensitive 20-cm radio survey of regions of the sky that have
    been surveyed in the far-infrared (FIR) over the wavelength range
    5-200{mu}m with ISO (Infrared Space Observatory) as part of the
    European Large-Area ISO Survey (ELAIS). As usual in surveys based on a
    relatively small number of overlapping VLA pointings, the flux limit
    varies over the area surveyed: from a 5{sigma} limit of 0.135mJy over
    an area of 0.12deg^2^ to 1.15mJy or better over the whole region
    covered of 4.22deg^2^. In this paper we present the complete radio
    catalogue of 867 sources, 428 of which form a complete sample in the
    flux range 0.2-1.0mJy. These regions of the sky have previously been
    surveyed to shallower flux limits at 20cm with the VLA as part of the
    VLA D configuration NVSS (full width at half-maximum, FWHM=45arcsec)
    and VLA B configuration FIRST (FWHM=5arcsec) surveys. Our whole survey
    has a nominal 5{sigma} flux limit a factor of 2 below that of the
    NVSS; 3.4deg^2^ of the survey reaches the nominal flux limit of the
    FIRST survey and 1.5deg^2^ reaches 0.25mJy, a factor of 4 below the
    nominal FIRST survey limit. In addition, our survey is at a resolution
    intermediate between the two surveys and thus is well suited for a
    comparison of the reliability and resolution-dependent surface
    brightness effects that affect interferometric radio surveys. We have
    carried out a detailed comparison of our own survey and these two
    independent surveys in order to assess the reliability and
    completeness of each. Considering the whole sample, we found that to
    the 5{sigma} nominal limits of 2.3 and 1.0mJy, respectively, the NVSS
    and FIRST surveys have a completeness of 96^+2^_-3_ and 89^+2^_-3_ per
    cent and a reliability of 99^+1^_-2_ and 94^+2^_-2_ per cent.

File Summary:
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  FileName      Lrecl  Records   Explanations
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ReadMe             80        .   This file
table3.dat        201      965   The VLA radio catalog of the ISO region
                                  N1(1610+5430), N2(1636+4115) and N3(1429+3306)
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See also:
    J/MNRAS/305/297 : ISO ELAIS 1.4GHz survey (Gruppioni+, 1999)

Byte-by-byte Description of file: table3.dat
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   Bytes Format Units     Label   Explanations
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   1- 19  A19   ---       ELAISR  Designation (ELAISR JHHMMSS+DDMMSSA in Simbad)
      20  A1    ---     m_ELAISR  [ABCDT] Multiplicity index on ELAISR (1)
  24- 30  F7.3  mJy       Speak   Peak flux density
  34- 38  F5.3  mJy     e_Speak   rms uncertainty on Speak
  42- 48  F7.3  mJy       Stotal  Total flux density
  52- 56  F5.3  mJy     e_Stotal  rms uncertainty on Stotal
  59- 60  I2    h         RAh     Right ascension (2000)
  62- 63  I2    min       RAm     Right ascension (2000)
  65- 71  F7.4  s         RAs     Right ascension (2000)
      73  A1    ---       DE-     Declination sign (2000)
  74- 75  I2    deg       DEd     Declination (2000)
  77- 78  I2    arcmin    DEm     Declination (2000)
  80- 85  F6.3  arcsec    DEs     Declination (2000)
  90- 94  F5.3  arcsec  e_RAs     rms uncertainty on RA
  98-102  F5.3  arcsec  e_DEs     rms uncertainty on DE
 107-112  F6.3  arcsec    Major   FWHM of the major axis
 115-120  F6.3  arcsec    Minor   FWHM of the minor axis
 122-126  F5.1  deg       PA      [-180/180] Position angle of the major axis
                                   measured east to north
 130-134  F5.3  arcsec  e_Major   rms uncertainty on Major
 138-142  F5.3  arcsec  e_Minor   rms uncertainty on Minor
 146-148  F3.1  deg     e_PA      rms uncertainty on PA
 151-156  F6.1  pix       Xpos    X position (1pix=3")
 158-163  F6.1  pix       Ypos    Y position (1pix=3")
 169-175  F7.2  ---       Sigma   Parameter not specified in the paper
 179-185  F7.2  ---       S/N     Signal-to-noise ratio
 190-193  F4.1  arcmin    Off     Off-axis value in the VLA map
 197-198  A2    ---       Field   Field designation (N1, N2, N3)
     201  I1    ---       Rcomp   Number of the component of the field
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Note (1): The different components of multiple sources are labelled 'A', 'B',
           etc., followed by a line labelled 'T' in which flux and position for
           the total sources are given.
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History: Copied by ftp at http://www.ast.cam.ac.uk/elais/
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(End)                           James Marcout, Patricia Bauer [CDS]  26-Feb-1999