J/AJ/132/2409 Deep ATLAS radio observations of CDFS (Norris+, 2006)
Deep ATLAS radio observations of the Chandra Deep Field-South/Spitzer
wide-area infrared extragalactic field.
Norris R.P., Afonso J., Appleton P.N., Boyle B.J., Ciliegi P., Croom S.M.,
Huynh M.T., Jackson C.A., Koekemoer A.M., Lonsdale C.J., Middelberg E.,
Mobasher B., Oliver S.J., Polletta M., Siana B.D., Smail I., Voronkov M.A.
<Astron. J., 132, 2409-2423 (2006)>
=2006AJ....132.2409N 2006AJ....132.2409N
ADC_Keywords: Surveys ; Active gal. nuclei ; Radio sources ; Infrared sources ;
Photometry, SDSS
Keywords: catalogs - galaxies: active - galaxies: evolution -
radio continuum: galaxies - surveys
Abstract:
We present the first results from the Australia Telescope Large Area
Survey, which consists of deep radio observations of a 3.7deg2 field
surrounding the Chandra Deep Field-South, largely coincident with the
infrared Spitzer Wide-Area Infrared Extragalactic (SWIRE) Survey. We
also list cross-identifications to infrared and optical photometry
data from SWIRE, and ground-based optical spectroscopy. A total of 784
radio components are identified, corresponding to 726 distinct radio
sources, nearly all of which are identified with SWIRE sources. Of the
radio sources with measured redshifts, most lie in the redshift range
0.5-2 and include both star-forming galaxies and active galactic
nuclei. We identify a rare population of infrared-faint radio sources
that are bright at radio wavelengths but are not seen in the available
optical, infrared, or X-ray data. Such rare classes of sources can
only be discovered in wide, deep surveys such as this.
Description:
Observations where made on 2002 Apr 4-27, Aug 24-29 and 2004 Jan 7-12,
Feb 1-5, Jun 6-12 and Nov 24-30, with the Australia Telescope.
All observations were made with two 128MHz bands, centered on 1344 and
1472MHz.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 215 784 Catalog of Radio components
table6.dat 427 726 Catalog of Radio Sources with their
identifications and classifications
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See also:
II/253 : Chandra Deep Field South: multi-colour data (Wolf+, 2004)
J/MNRAS/328/150 : KX redshift survey (Croom+, 2001)
J/A+A/375/1 : IR obs. of Chandra Deep Field + HDF-South (Saracco+, 2001)
J/A+A/377/442 : Chandra Deep Field South: R-band photometry (Wolf+, 2001)
J/A+A/379/740 : ESO Imaging Survey (EIS) (Arnouts+, 2001)
J/A+A/392/741 : Stellar Catalogue in the Chandra DFS (Groenewegen+ 2002)
J/ApJS/139/369 : Chandra Deep Field South. 1 Ms catalog (Giacconi+, 2002)
J/A+A/403/493 : H-band observation of Chandra Deep Field South (Moy+, 2003)
J/AJ/126/539 : The Chandra Deep Fields North and South (Alexander+, 2003)
J/ApJ/595/685 : HST imaging in Chandra Deep Field-South (Grogin+, 2003)
J/A+A/428/1043 : Redshifts from VIMOS VLT Deep Survey (Le Fevre+, 2004)
J/ApJS/155/73 : Photometric redshifts of X-ray sources in CDF-S (Zheng+ 2004)
J/ApJS/155/271 : Chandra Deep Field-South Optical spectroscopy (Szokoly+ 2004)
J/ApJS/161/21 : Extended Chandra Deep Field-South survey (Lehmer+, 2005)
J/A+A/441/905 : UBVRI from the Garching-Bonn Deep Survey (Hildebrandt+, 2005)
J/AJ/131/2373 : Extended Chandra Deep Field-South survey (Virani+, 2006)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- CID Component number (CNN,
[NAA2006] CNNN in Simbad)
6- 11 A6 --- --- [ATCDFS]
12 A1 --- --- [_]
13- 31 A19 --- ATCDFS Designation for the radio component,
JHHMMSS.ss-DDMMSS.s (1)
33 I1 h RAh Hour of Right Ascension (J2000)
35- 36 I2 min RAm Minute of Right Ascension (J2000)
38- 43 F6.3 s RAs Second of Right Ascension (J2000)
45 A1 --- DE- Sign of the Declination (J2000)
46- 47 I2 deg DEd Degree of Declination (J2000)
49- 50 I2 arcmin DEm Arcminute of Declination (J2000)
52- 56 F5.2 arcsec DEs Arcsecond of Declination (J2000)
57- 60 F4.2 arcsec e_RAs The RMS uncertainty in RAs (2)
62- 65 F4.2 arcsec e_DEs The RMS uncertainty in DEs (2)
67- 72 F6.2 mJy Speak Peak Flux density at 20cm (3)
74- 80 F7.2 mJy Sint Integrated flux density at 20cm (3)
82- 85 F4.1 arcsec MajAxis Deconvolved FWHM major axis (4)
87- 90 F4.1 arcsec MinAxis Deconvolved FWHM minor axis (4)
92- 97 F6.1 deg PA [-90/90] Major axis position angle
(East of North)
99-103 F5.1 uJy rms Sextractor RMS value at component position,
in units of microJy/beam
105-215 A111 --- Com Additional comments
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Note (1): In the case of single-component sources, this is identical to the
source name used in Table 6. This is the formal IAUC designation and
should be used in literature when referring to this component.
Note (2): These include the formal uncertainties derived from the Gaussian
fit together with a potential systematic error in the position of the
calibrator source of 0.1arcsec. Comparison of our positions with
Spitzer positions in Section 3.3 below shows that these estimated
uncertainties are realistic.
Note (3): Of the fitted Gaussian. The estimated uncertainty is 20% in
quadrature with RMS.
Note (4): Of the fitted Gaussian. If the undeconvolved fitted axis was
within one formal standard error of the restoring beam size, it was
set to zero.
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- SID Component number (SNNN,
[NAA2006] SNNN in Simbad)
6- 11 A6 --- --- [ATCDFS]
12 A1 --- --- [_]
13- 31 A19 --- ATCDFS Designation for the radio component,
JHHMMSS.ss-DDMMSS.s (1)
33- 51 A19 --- CID Component(s) number(s) in to Table 4
53- 59 A7 --- --- [SWIRE3_]
60- 78 A19 --- SWIRE SWIRE designated name JHHMMSS.ss-DDMMSS.s (2)
80 I1 h RAh Hour of Right Ascension (J2000) (3)
82- 83 I2 min RAm Minute of Right Ascension (J2000) (3)
85- 90 F6.3 s RAs Second of Right Ascension (J2000) (3)
92 A1 --- DE- Sign of the Declination (J2000) (3)
93- 94 I2 deg DEd Degree of Declination (J2000) (3)
96- 97 I2 arcmin DEm Arcminute of Declination (J2000) (3)
99-103 F5.2 arcsec DEs Arcsecond of Declination (J2000) (3)
105-110 F6.1 mJy F20cm Total 20 cm flux density (4)
112-118 F7.1 uJy F3.6um ? Infrared 3.6um 3.6 micron flux density (5)
120-126 F7.1 uJy F4.5um ? Infrared 4.5um 4.5 micron flux density (5)
128-134 F7.1 uJy F5.8um ? Infrared 5.8um 5.8 micron flux density (5)
136-142 F7.1 uJy F8.0um ? Infrared 8.0um 8.0 micron flux density (5)
144-151 F8.1 uJy F24um ? Infrared 24um 24 micron flux density (5)
153-156 F4.1 mag u'mag ?=- SDSS u' band (Vega) magnitude (6)
158-161 F4.1 mag g'mag ?=- SDSS g' band (Vega) magnitude (6)
163-166 F4.1 mag r'mag ?=- SDSS r' band (Vega) magnitude (6)
168-171 F4.1 mag i'mag ?=- SDSS i' band (Vega) magnitude (6)
173-176 F4.1 mag z'mag ?=- SDSS z' band (Vega) magnitude (6)
178-183 F6.4 --- z ? Spectroscopic redshift (7)
185-186 I2 --- Type [-1/9] Identification type code (8)
188-190 A3 --- Class Classification based on Section 3.4 criteria
192-194 A3 --- f_Class Basis for class (9)
196-427 A232 --- Comm Additional comments (10)
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Note (1): In the case of single-component sources, this is identical to the
component name used in Table 4. This is the formal IAU designation and
should be used in literature when referring to this source.
Note (2): Name of the SWIRE identification used in SWIRE Public Data
Release 3. In cases where the source does not appear in the Public
Data Release 3, but did appear in the pre-release catalogue, the
source identification from the pre-release catalogue is shown in
brackets. A blank indicates there is no catalogued SWIRE source, but a
source may still be present in the SWIRE image, in which case it will
be noted in Comm.
Note (3): In the case of a single component, this is the position of the
radio source. In the case of a complex source, such as a radio double,
this is the position of the host galaxy. In the latter case, this is
the optical position if one is available, or else an infrared
position.
Note (4): This is the total integrated 20cm flux of all components included
in the source.
Note (5): These fluxes are optimized so that they are aperture extractions
for point sources and extended (Kron) extractions for extended
sources. A value of -1 indicates that the source was undetected,
and a blank indicates that the source was not observed, or that its
flux is not listed in the SWIRE catalog.
Note (6): Aperture magnitudes for stellar sources, and integrated
magnitudes for extended sources. Filter characteristics are shown in
Table 3. A 99 indicates that the source was undetected, and a blank
indicates that the source was not observed.
Note (7): In most cases these have been measured by us as part of this
program, as described in Section 2.5. In some cases they are taken
from other authors, in which case this is noted in Comm. To avoid
ambiguity, photometric redshifts are not included here.
Note (8): Type as follows:
-1 = Part of a classical radio double
1 = Within 1" of SWIRE source
2 = 1"-2" from SWIRE source
3 = 2"-3" from SWIRE source
4 = Good ID but >3"
5 = Part of a classical radio double
6 = Part of a classical radio triple
7 = IRAC source, not in SWIRE catalog
8 = Outside SWIRE region
9 = Infrared-Faint Radio Source (IFRS)
10 = Part of another source (e.g., knots in jets)
Note (9): The criterion used for the classification is given by the
lower-case letter as follows:
a = morphology (i.e. double, triple, or core-jet radio source)
b = value of q24um=log(S24um/S20cm)
c = classification taken from the literature
s = based on spectroscopy presented in this paper
x = based on X-ray hardness ratio given by Giacconi et al.
(2002, Cat. J/ApJS/139/369)
Note (10): "M-test" refers the criterion for selecting double radio sources
described by Magliocchetti et al. (1998MNRAS.300..257M 1998MNRAS.300..257M). "XIDnnn(mm)"
indicates that the source was detected by Chandra (Giacconi et al.,
2002, Cat. J/ApJS/139/369), and is labeled XIDnnn, with hardness ratio
mm, in their catalogue. z(x) gives the reference for the redshift as
follows:
a = this paper (ADROIT observations)
b = this paper (AAOmega observations)
c = Afonso et al. (2006, Cat. J/AJ/131/1216)
d = Croom et al. (2001, Cat. VII/223)
e = da Costa et al. (1998, Cat. J/AJ/116/1)
f = Vanzella et al. (2006, Cat. J/A+A/454/423)
g = Colless et al. (2001, Cat. VII/250)
h = Le Fevre et al. (2004, Cat. J/A+A/428/1043)
i = Loveday et al. (1996, Cat. J/ApJS/107/201)
j = Cimatti et al. (2004Natur.430..184C 2004Natur.430..184C)
k = Way et al. (2005, Cat. J/AJ/130/2012)
l = Lauberts & Valentijn (1989, Cat. VII/115)
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 30-Jul-2008