J/MNRAS/302/222 ISO ELAIS 20cm VLA survey regions (Ciliegi+, 1999)
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 1999MNRAS.302..222C
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
5-200µm 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 5σ limit of 0.135mJy over
an area of 0.12deg2 to 1.15mJy or better over the whole region
covered of 4.22deg2. 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 5σ flux limit a factor of 2 below that of the
NVSS; 3.4deg2 of the survey reaches the nominal flux limit of the
FIRST survey and 1.5deg2 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 5σ 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:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
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)
--------------------------------------------------------------------------------
See also:
J/MNRAS/305/297 : ISO ELAIS 1.4GHz survey (Gruppioni+, 1999)
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 A6 --- --- [ELAISR]
7- 19 A13 --- 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 at 1.4GHz
34- 38 F5.3 mJy e_Speak rms uncertainty on Speak
42- 48 F7.3 mJy Stotal Total flux density at 1.4GHz
52- 56 F5.3 mJy e_Stotal rms uncertainty on Stotal
59- 60 I2 h RAh Right ascension (J2000)
62- 63 I2 min RAm Right ascension (J2000)
65- 71 F7.4 s RAs Right ascension (J2000)
73 A1 --- DE- Declination sign (J2000)
74- 75 I2 deg DEd Declination (J2000)
77- 78 I2 arcmin DEm Declination (J2000)
80- 85 F6.3 arcsec DEs Declination (J2000)
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
--------------------------------------------------------------------------------
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.
--------------------------------------------------------------------------------
History: Copied by ftp at http://www.ast.cam.ac.uk/elais/
(End) James Marcout, Patricia Bauer [CDS] 26-Feb-1999