J/ApJS/179/114 VLA 1.4GHz survey of E-CDF-S (Miller+, 2008)
The VLA 1.4 GHz survey of the Extended Chandra Deep Field-South:
first data release.
Miller N.A., Fomalont E.B., Kellermann K.I., Mainieri V., Norman C.,
Padovani P., Rosati P., Tozzi P.
<Astrophys. J. Suppl. Ser., 179, 114-123 (2008)>
=2008ApJS..179..114M 2008ApJS..179..114M
ADC_Keywords: Radio sources ; Surveys ; Cross identifications
Keywords: catalogs - radio continuum: galaxies - surveys
Abstract:
We have observed the Extended Chandra Deep Field-South (E-CDF-S) using
a mosaic of six deep Very Large Array (VLA) pointings at 1.4GHz.
In this paper, we present the survey strategy, description of the
observations, and the first data release. The observations were
performed during June through September of 2007 and included from
15 to 17 "classic" VLA antennas and 6 to 11 that had been retrofitted
for the Expanded VLA (EVLA). The first data release consists of a
34.1'x34.1' image and the attendant source catalog. The image achieves
an rms sensitivity of 6.4µJy per 2.8"x1.6" beam in its deepest
regions, with a typical sensitivity of 8uJy. The catalog is
conservative in that it only lists sources with peak flux densities
greater than seven times the local rms noise, yet it still contains
464 sources. Nineteen of these are complex sources consisting of
multiple components. Cross matching of the catalog to prior surveys
of the E-CDF-S confirms the linearity of the flux density calibration,
albeit with a slight possible offset (a few percent) in scale.
Improvements to the data reduction and source catalog are ongoing, and
we intend to produce a second data release in 2009 January.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 78 514 *Preliminary Source List
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Note on table2.dat: Sources identified as [MFK2008] JHHMMSS.ss+DDMMSS.s
in Simbad
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See also:
J/ApJS/179/71 : VLA survey of CDF-S. I. (Kellermann+, 2008)
J/AJ/132/2409 : Deep ATLAS radio observations of CDFS (Norris+, 2006)
J/AJ/131/1216 : Faint radio sources in the CDF-S ACS field (Afonso+, 2006)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Hour of Right Ascension (J2000)
4- 5 I2 min RAm Minute of Right Ascension (J2000)
7- 11 F5.2 s RAs Second of Right Ascension (J2000)
13 A1 --- DE- Degree of the Declination (J2000)
14- 15 I2 deg DEd Degree of Declination (J2000)
17- 18 I2 arcmin DEm Arcminute of Declination (J2000)
20- 23 F4.1 arcsec DEs Arcsecond of Declination (J2000)
25- 30 F6.1 --- SNR ? Signal-to-noise ratio (1)
32 A1 --- n_SNR [a] Source with low SNR (2)
34- 40 F7.1 uJy Sp ? Peak flux density at 1.4GHz
42- 45 F4.1 uJy e_Sp ? Error in Sp
47- 53 F7.1 uJy Si Integrated flux density at 1.4GHz
55- 59 F5.1 uJy e_Si Error in Si
61- 62 I2 --- Res Resolution index (3)
64- 67 A4 --- [KFM2008] Kellermann et al. (2008, Cat. J/ApJS/179/71)
identification (4)
69- 72 A4 --- [NAA2006] ATCA survey identification (CNNN) (5)
74- 78 A5 --- [AMK2006] ATCA survey identification(s) (NN) (6)
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Note (1): Determined as source peak flux density over local rms.
Note (2): Although this source marked by 'a' has S/N<7 for its peak flux
density, its integrated flux is well over a 5σ detection and
hence it has been included in this catalog.
Note (3): Resolution index as follows:
0 = source is unresolved on both axes in mosaic image,
1 = resolved on one axis only,
2 = resolved on both axes,
3 = resolved on both axes and the integrated flux density was measured
through aperture photometry rather than Gaussian fitting.
-1 = unresolved in the individual pointing with the nearest field center.
-2 = unresolved in the individual pointing with the nearest field center.
Note (4): Where capital letters indicate components of a larger source and
lower case letters indicate new components resolved by the current
observations. [KFM2008] RID NNNA in Simbad.
Note (5): From Norris et al. (2006, Cat. J/AJ/132/2409,
[NAA2006] CNNN in Simbad).
Note (6): Afonso et al. (2006, Cat. J/AJ/131/1216,
[AMK2006] NNa in Simbad)
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 06-Aug-2009