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ATLASCSID - AT Large Area Survey (ATLAS) CDF-S/SWIRE ID and Classification Catalog

HEASARC
Archive

Overview

This table contains some of the first results from the Australia Telescope Large Area Survey (ATLAS), which consists of deep radio observations of a 3.7 deg2 field surrounding the Chandra Deep Field-South (CDF-S), largely coincident with the infrared Spitzer Wide-Area Infrared Extragalactic (SWIRE) Survey. A total of 784 radio components are identified (see the companion table ATLASCSCPT), 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 to 2 and include both star-forming galaxies and active galactic nuclei. The authors 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.

The radio 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 Compact Array (ATCA). The observations in 2002 were made in a mosaic of 7 overlapping fields, for a total of 149 hours of integration time, or 21.3 hours per pointing. The observations in 2004 were taken in the AT mosaic mode, in which the array was cycled around 21 pointing centers They total 173 hours of integration time, or 8.2 hours per pointing. All observations were made with two 128-MHz bands, centered on frequencies of 1344 and 1472 MHz.

This table contains the list of 726 radio sources and their cross-identifications at optical and infrared wavelengths which were given in Table 6 of the reference paper. The authors define a radio 'component' as a region of radio emission identified in the source extraction process. They define a radio 'source' as one or more radio components that appear to be physically connected and that probably correspond to one galaxy. Thus, the authors count a classical triple radio-loud source as being a radio source consisting of three radio components, but count a pair of interacting starburst galaxies as being two sources, each with one radio component.


Catalog Bibcode

2006AJ....132.2409N

References

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

Provenance

his table was created by the HEASARC in August 2012 based on CDS Catalog J/AJ/132/2409 file table6.dat.

Parameters

Name
The designation for the radio source as recommended by the Dictionary of Nomenclature of Celestial Objects, viz., 'ATCDFS JHHMMSS.ss-DDMMSS.s', where the prefix stands for Australia Telescope Chandra Deep Field-South, and the numerical string is the J2000.0 equatorial coordinates of the source. In the case of single-component sources, this is identical to the name of the component used in Table 4 of the reference paper (the HEASARC ATLASCSCPT table).

Alt_Name
An alternative designation for the radio source as recommended by the Dictionary of Nomenclature of Celestial Objects, viz., '[NAA2006] SNNN', where the prefix stands for Norris, Afonso, Appleton 2006, and the 'SNNN' part refers to the source NNN, an internal designation used in the paper.

Component_Name_1
The designation of one of the radio components comprising the radio source. Detailed information about the individual radio components is given in the HEASARC table ATLASCSCPT.

Component_Name_2
The designation of a second radio component (if any) comprising the radio source. Detailed information about the individual radio components is given in the HEASARC table ATLASCSCPT.

Component_Name_3
The designation of a third radio component (if any) comprising the radio source. Detailed information about the individual radio components is given in the HEASARC table ATLASCSCPT.

Component_Name_4
The designation of a fourth radio component (if any) comprising the radio source. Detailed information about the individual radio components is given in the HEASARC table ATLASCSCPT.

Swire_Name
The designated name of the SWIRE identification for the IR counterpart to the radio source as used in SWIRE Public Data Release 3, e.g., 'SWIRE JHHMMSS.ss+DDMMSS.s' (The HEASARC has replaced the 'SWIRE3' prefix used in the original table with the 'SWIRE' prefix in compliance with the recommendation of the Dictionary of Nomenclature of Celestial Objects). In cases in which the source does not appear in the Public Data Release 3 but did appear in the prerelease catalog, the numerical source identification from the prerelease catalog is shown with the prefix 'IIN' for 'internal identification number'. A blank indicates there is no cataloged SWIRE source, but a source may still be present in the SWIRE image, in which case it is noted in the 'Comments' parameter.

RA
The Right Ascension in the selected equinox. This was given in J2000.0 equatorial coordinates to a precision of 0.001 seconds of time in the original table. In the case of a single component, this position 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.

Dec
The Declination in the selected equinox. This was given in J2000.0 equatorial coordinates to a precision of 0.01 arcseconds in the original table. In the case of a single component, this position 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.

LII
The Galactic Longitude.

BII
The Galactic Latitude.

Int_Flux_1p4_GHz
The total 20-cm flux density, in mJy. This is the total integrated 20-cm flux density of all components included in the source.

IRAC_3p6_um_Flux
The infrared flux density measured by Spitzer/IRAC at 3.6 micron (um), in microJansky (uJy). These fluxes are optimized so that they are aperture extractions for point sources and extended (Kron) extractions for extended sources. A '-1' value 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.

IRAC_4p5_um_Flux
The infrared flux density measured by Spitzer/IRAC at 4.5 micron (um), in microJansky (uJy). These fluxes are optimized so that they are aperture extractions for point sources and extended (Kron) extractions for extended sources. A '-1' value 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.

IRAC_5p8_um_Flux
The infrared flux density measured by Spitzer/IRAC at 5.8 micron (um), in microJansky (uJy). These fluxes are optimized so that they are aperture extractions for point sources and extended (Kron) extractions for extended sources. A '-1' value 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.

IRAC_8p0_um_Flux
The infrared flux density measured by Spitzer/IRAC at 8.0 micron (um), in microJansky (uJy). These fluxes are optimized so that they are aperture extractions for point sources and extended (Kron) extractions for extended sources. A '-1' value 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.

MIPS_24_um_Flux
The infrared flux density measured by Spitzer/MIPS at 24 micron (um), in microJansky (uJy). These fluxes are optimized so that they are aperture extractions for point sources and extended (Kron) extractions for extended sources. A '-1' value 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.

Umag
The SDSS U/u' aperture magnitude for stellar sources, and the integrated magnitude for extended sources. All magnitudes are in the Vega system. Filter characteristics are shown in Table 3 of the reference paper. A value of 99.0 indicates that the source was undetected, while a blank value indicates that the source was not observed.

Gmag
The SDSS g' aperture magnitude for stellar sources, and the integrated magnitude for extended sources. All magnitudes are in the Vega system. Filter characteristics are shown in Table 3 of the reference paper. A value of 99.0 indicates that the source was undetected, while a blank value indicates that the source was not observed.

Rmag
The SDSS r' aperture magnitude for stellar sources, and the integrated magnitude for extended sources. All magnitudes are in the Vega system. Filter characteristics are shown in Table 3 of the reference paper. A value of 99.0 indicates that the source was undetected, while a blank value indicates that the source was not observed.

Imag
The SDSS I' aperture magnitude for stellar sources, and the integrated magnitude for extended sources. All magnitudes are in the Vega system. Filter characteristics are shown in Table 3 of the reference paper. A value of 99.0 indicates that the source was undetected, while a blank value indicates that the source was not observed.

Zmag
The SDSS z' aperture magnitude for stellar sources, and the integrated magnitude for extended sources. All magnitudes are in the Vega system. Filter characteristics are shown in Table 3 of the reference paper. A value of 99.0 indicates that the source was undetected, while a blank value indicates that the source was not observed.

Redshift
The spectroscopic redshift. In most cases, these have been measured by the authors as part of this program, as described in Section 2.5 of the reference paper. In some cases, they are taken from other authors, in which case this is noted in the 'Comments' parameter value. To avoid ambiguity, photometric redshifts are not included here.

ID_Code
The type and accuracy of the radio-infrared identification, using the code listed in Table 5 of the reference paper, thus:

       -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)
  

Source_Type
The source classification (AGN or SF for star formation galaxy) based on the criteria described in Section 3.4 of the reference paper.

Source_Type_Flag
The basis for the source classification (see Section 3.4 of the reference paper for more details). The criterion used for the classification is given by the following lower case letters:

    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, ApJS,
        139, 369).
  

Comments
Additional notes about the source. 'M-test' refers to the criterion for selecting double radio sources described by Magliocchetti et al. (1998, MNRAS, 300, 257). 'XIDnnn(mm)' indicates that the source was detected by Chandra (Giacconi et al., 2002, ApJS, 139, 369), and is labeled XIDnnn, with a hardness ratio mm, in their catalog. The terms 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, AJ, 131, 1216)
       d = Croom et al. (2001, CDS Cat. VII/223)
       e = da Costa et al. (1998, AJ, 116, 1)
       f = Vanzella et al. (2006, A&A, 454, 423)
       g = Colless et al. (2001, CDS Cat. VII/250)
       h = Le Fevre et al. (2004, A&A, 428, 1043)
       i = Loveday et al. (1996, ApJS, 107, 201)
       j = Cimatti et al. (2004, Nature, 430, 184)
       k = Way et al. (2005, AJ, 130, 2012)
       l = Lauberts & Valentijn (1989, CDS Cat. VII/115)
  

Class
The HEASARC Browse/Xamin object classification based on the source type parameter value.


Contact Person

Questions regarding the ATLASCSID database table can be addressed to the HEASARC User Hotline.

Page Author: Browse Software Development Team
Last Modified: 23-Aug-2012