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ATLASESID - AT Large Area Survey (ATLAS) ELAIS-S1/SWIRE ID and Classification Catalog

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Overview

This table contains results from the Australia Telescope Large Area Survey (ATLAS), and consists of sensitive (1 sigma < 30 uJy) 1.4-GHz radio observations of a 3.9 deg2 field centered on the European Large Area ISO Survey S1 (ELAIS-S1) region, largely coincident with infrared observations of the Spitzer Wide-Area Infrared Extragalactic (SWIRE) Survey. In their paper, the authors describe the observations and calibration, source extraction, and cross-matching to infrared sources. A total of 1366 radio components are identified, corresponding to 1276 distinct radio sources, 1183 of which are matched with infrared sources in the present table. The authors have discovered 31 radio sources with no infrared counterpart at all, adding to the class of Infrared-Faint Radio Sources.

The radio observations where made on 27 separate days in 2004 and 2005 with the Australia Telescope Compact Array (ATCA) with a total net integration time of 231 hours, as described in detail in Section 2.1 and Tables 1 and 2 of the reference paper. The observations were made in a mosaic of 20 overlapping pointings, where pointings 1-12 have net integration times of 10.5 hours per pointing and pointings 13-24 have net integration times of 13.5 hours per pointing. All observations were made with two 128-MHz bands, centered on frequencies of 1.34 and 1.43 GHz. After editing, the predicted noise level is 22 uJy in the center of the mosaic. Toward the image edges, the noise level increases due to primary beam attenuation.

This table contains the list of 1276 radio sources and their cross-identifications at optical and infrared wavelengths which were given in Table 5 of the reference paper. The authors define a radio 'component' as a region of radio emission which is best defined as a Gaussian. Close radio doubles are very likely to be best represented by two Gaussians and are therefore deemed to consist of two components. Single or multiple components are called a radio source if they are deemed to belong to the same object.


Catalog Bibcode

2008AJ....135.1276M

References

Deep Australia Telescope Large Area Survey radio observations of the european
large area ISO survey S1/Spitzer wide-area infrared  extragalactic field.
    Middelberg E., Norris R.P., Cornwell T.J., Voronkov M.A., Siana B.D.,
    Boyle B.J., Ciliegi P., Jackson C.A., Huynh M.T., Berta S., Rubele S.,
    Lonsdale C.J., Ivison R.J., Smail I.
   <Astron. J., 135, 1276-1290 (2008)>
   =2008AJ....135.1276M

Provenance

This table was created by the HEASARC in August 2012 based on CDS Catalog J/AJ/135/1276 file table5.dat.

Parameters

Name
The designation for the radio component as recommended by the Dictionary of Nomenclature of Celestial Objects, viz., 'ATELAIS JHHMMSS.ss-DDMMSS.s', where the prefix stands for Australia Telescope European Large Area ISO Survey, and the numerical string is the J2000.0 equatorial coordinates of the component. In the case of single-component sources, this is identical to the source name used in Table 4 of the reference paper (the HEASARC ATLASESCPT table). This is the formal IAU designation and should be used in the literature when referring to this source.

Alt_Name
An alternative designation for the radio source as recommended by the Dictionary of Nomenclature of Celestial Objects, viz., '[MNC2008] SNNNN(.N)', where the prefix stands for Middelberg, Norris, Cornwell 2008, and the 'SNNN(.N)' part refers to the source NNNN(.N), 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 ATLASESCPT.

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 ATLASESCPT.

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 ATLASESCPT.

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 ATLASESCPT.

Component_Name_5
The designation of a fifth radio component (if any) comprising the radio source. Detailed information about the individual radio components is given in the HEASARC table ATLASESCPT.

Component_Name_6
The designation of a sixth radio component (if any) comprising the radio source. Detailed information about the individual radio components is given in the HEASARC table ATLASESCPT.

Swire_Name
The designated name of the SWIRE identification for the IR counterpart to the radio source as used in SWIRE Public Data Release 4, e.g., 'SWIRE JHHMMSS.ss+DDMMSS.s' (The HEASARC has replaced the 'SWIRE4' prefix used in the original table with the 'SWIRE' prefix in compliance with the recommendation of the Dictionary of Nomenclature of Celestial Objects). A blank indicates there is no cataloged SWIRE source, although an infared counterpart may still be present.

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 single-component sources, this is the radio position of the component. In the case of multi-component sources with good infrared identification, the SWIRE position is used. In the case of multi-component sources without infrared identification, the coordinates are a flux-weighted mean of the components' coordinates

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 single-component sources, this is the radio position of the component. In the case of multi-component sources with good infrared identification, the SWIRE position is used. In the case of multi-component sources without infrared identification, the coordinates are a flux-weighted mean of the components' coordinates

LII
The Galactic Longitude.

BII
The Galactic Latitude.

Int_Flux_1p4_GHz
The total 20-cm flux density, in mJy. In the case of extended or multiple-component sources, the flux density has been integrated over the source region, rather than taking the sum of its constituent components.

Int_Flux_1p4_GHz_Error
The associated error in the integrated 20-cm flux density, in mJy. The authors estimated the error of the integrated flux densities using Equation (1) in Schinnerer et al. (2004, AJ, 128, 1974), which is based on Condon (1997, PASP, 109, 166), assuming a relative error of the flux calibration of 5% (whereas Schinnerer et al. (2004) assumed 1%). In the case of extended sources, where the integrated flux density was measured by integrating over a polygon in the image, the authors assumed a 5% scaling error and added to that in quadrature an empirical error arising from the shape and size of the area which it was integrated:

      Delta(S) = sqrt [(0.05S)2 + (10(-7)/S)2]
  
where S is the flux density in Jy. For extended sources with flux densities of 10 mJy, 1 mJy, and 0.5 mJy, the total errors are thus 0.5 mJy (5%), 0.11 mJy (11%), and 0.2 mJy (40%), respectively, which describe the errors that were found empirically reasonably well.

IRAC_3p6_um_Flux
The infrared flux density measured by Spitzer/IRAC at 3.6 micron (um), in microJansky (uJy). Aperture-corrected flux densities have been used unless the source was clearly extended, in which case the flux in a Kron aperture has been used. 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). Aperture-corrected flux densities have been used unless the source was clearly extended, in which case the flux in a Kron aperture has been used. 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). Aperture-corrected flux densities have been used unless the source was clearly extended, in which case the flux in a Kron aperture has been used. 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). Aperture-corrected flux densities have been used unless the source was clearly extended, in which case the flux in a Kron aperture has been used. 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). Aperture-corrected flux densities have been used unless the source was clearly extended, in which case the flux in a Kron aperture has been used. A blank indicates that the source was not observed or that its flux is not listed in the SWIRE catalog.

Bmag
The B-band magnitude of the Spitzer counterpart, in Vega units.

Vmag
The V-band magnitude of the Spitzer counterpart, in Vega units.

Rmag
The Rc-band magnitude of the Spitzer counterpart, in Vega units.

AGN_Flag
This flag parameter indicates whether a source has been classified as AGN or not, and based on what criteria, as follows:

    f:  indicates AGN classification based on the far-infrared-radio relation,
    m:  indicates AGN classification based on morphology,
    l:  indicates AGN classification taken from the literature.
  

Radio_Double_Flag
This flag parameter gives the result of the test (developed by Magliocchetti et al. (1998, MNRAS, 300, 257) and described in Section 3.2 of the reference paper) which has been performed for double radio sources to see if they are likely physical doubles. A '-' indicates failure, an 'x' success, of the two parts of the test (the separation and flux density ratio of the constituents).

Redshift
The source redshift.

Ref_Redshift
The reference for the redshift, as follows:

      2df = Colless et al. (2001, CDS Cat. <VII/226>, obsoleted by CDS
            Cat. <VII/250>);
      6dF = Jones et al. (2004, CDS Cat. <VII/249>, obsoleted by CDS
            Cat <VII/259>);
      A01 = Alexander et al. (2001, ApJ, 554, 18);
      L04 = La Franca et al. (2004, AJ, 127, 3075);
      P06 = Puccetti et al. (2006, A&A, 457, 501);
      S01 = Serjeant et al. (2001, MNRAS, 322, 262);
      S96 = Shectman et al. (1996, CDS Cat. <VII/203>);
      W03 = Wegner et al. (2003, AJ, 126, 2268).
  

Comments
Additional comments on the source.

Elaisr_Name
The ELAISR designation of the source as recommended by the Dictionary of Nomenclature of Celestial Objects,, viz., 'ELAISR JHHMMSS+DDMMSSA', from Gruppioni et al. 1999, MNRAS, 305, 297). This was given in the deprecated form 'ELAIS20R_JHHMMSS+DDMMSSA' in the reference paper.

NED_Name
Another source designation as taken from NED.


Contact Person

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

Page Author: Browse Software Development Team
Last Modified: 24-Aug-2012