ATESP1P4GH - Australia Telescope ESO Slice Project 1.4-GHz Source Catalog

Overview

The Australia Telescope ESO Slice Project (ATESP) survey is a radio survey which was accomplished with the Australia Telescope Compact Array (ATCA) at 1.4 GHz over the region covered by the ESO Slice Project (ESP: Vettolani et al. 1997, A&A, 325, 954) galaxy redshift survey. This 26-degree² region is centered at Declination -40 degrees, and ranges in RA from 22^h 30^m to 01^h 15^m. The ATESP survey consisted of 16 radio mosaics with 8 x 14 arcseconds resolution and uniform sensitivity (1 sigma noise level of ~ 79 microJansky) over the whole area of the ESP redshift survey. According to the reference paper, the final 6-sigma ATESP catalog contained 2960 sources down to a detection limit of ~ 0.5 mJy (6 sigma), 1402 of which are sub-mJy sources, and 189 of which are multiple sources (168 doubles, 19 triples and 2 quadruples).

This table contains the list of 6-sigma or more sources detected in the ATESP survey. For composite sources with multiple components, the individual components each have entries in this table, and there is also an entry for the entire source. Based on the numbers quoted above, this would imply that there should be (2960 + 2*168 + 3*19 + 4*2) = 3361 entries in this table. The HEASARC notes that there are actually 3370 entries in the CDS version of this table that the present table is based on, 169 of which are doubles, 19 triples and 2 quadruples, implying that this version has 2967 sources, slightly more than the number quoted in the reference paper.

Catalog Bibcode

2000A&AS..146...41P

References

The ATESP radio survey. II. The source catalogue.
    Prandoni I., Gregorini L., Parma P., De Ruiter H.R., Vettolani G.,
    Wieringa M.H., Ekers R.D.
   <Astron. Astrophys. Suppl. Ser. 146, 41 (2000)>
   =2000A&AS..146...41P

Provenance

This table was created by the HEASARC in November 2012 based on the CDS Catalog VIII/63 file atesp.dat.

Parameters

Name
The source designation as given in the reference paper using the prefix 'ATESP' for Australia Telescope ESO Slace Project together with the J2000.0 equatorial coordinates of the source, e.g., 'ATESP JHHMMSS+DDMMSS(A,B,C,D)', where the trailing letters A, B, C and D are used to refer to individual components of multiple sources.

RA
The Right Ascension of the radio source or component in the selected equinox. The RA was given in J2000.0 coordinates to a precision of 0.01 seconds of time in the original table. Source positions for composite sources have been defined as the flux-weighted average position of all the components (source centroid). For sources with more than two components, the centroid position has been replaced with the core position whenever the core is clearly recognizable.

Dec
The Declination of the radio source or component in the selected equinox. The RA was given in J2000.0 coordinates to a precision of 0.1 arcseconds in the original table. Source positions for composite sources have been defined as the flux-weighted average position of all the components (source centroid). For sources with more than two components, the centroid position has been replaced with the core position whenever the core is clearly recognizable.

LII
The Galactic Longitude of the radio source or component.

BII
The Galactic Latitude of the radio source or component.

Flux_1p4_GHz
The 1.4-GHz peak flux density of the radio source or component, in milliJansky per beam (mJy/beam), on the Baars et al. (1977, A&AS, 61, 99) scale. The values given here are not corrected for the systematic effects described in Section 4.2 of the reference paper.

Int_Flux_1p4_GHz
The 1.4-GHz integrated flux density of the radio source or component, in milliJansky (mJy). Integrated total source flux densities for composite sources are computed by summing all the component integrated fluxes.

Major_Axis
The intrinsic (deconvolved from the beam) major axis (FWHM) of the Gaussian fit to the radio source or component, in arcseconds. Zero values refer to unresolved sources (see Section 3.1 of the reference paper for more details). For entries describing the summed components of composite sources (entries with fit_quality_flag = 'M'), the total source angular size is given instead. This is defined as the largest angular size (las: see Section 2.3 of the reference paper) and it is computed as the maximum distance between the source components.

Minor_Axis
The intrinsic (deconvolved from the beam) minor axis (FWHM) of the Gaussian fit to the radio source or component, in arcseconds. Zero values refer to unresolved sources (see Section 3.1 of the reference paper for more details). This is left blank for entries describing the summed components of composite sources

Position_Angle
The deconvolved position angle of the the Gaussian fit to the radio source, in degrees, measured from North through East. Zero values refer to unresolved sources (see Section 3.1 of the reference paper). This is left blank for entries describing the summed components of composite sources

Fit_Quality_Flag
This parameter contains a flag indicating the fitting procedure and parametrization adopted for the source or source component (see Sections 2.3 and 3.2 of the reference paper), coded as follows:

     S refers to Gaussian fits,
     P refers to poor Gaussian fits, (changed from S* in the original table),
     E refers to non-Gaussian sources.
     M refers to multiple sources (see below).

The parameters listed for non-Gaussian sources are defined as discussed in Section. 2.3 of the reference paper. For multiple sources, the table lists all of the components as separate entries (labeled 'A', 'B., etc.) and also has an entry (flagged as 'M') giving the position of the radio centroid, total flux density and overall angular size of the entire source. Source positions for composite sources have been defined as the flux-weighted average position of all the components (source centroid). For sources with more than two components, the centroid position has been replaced with the core position whenever the core is clearly recognizable. Integrated total source flux densities for composite sources are computed by summing all the component integrated fluxes. The total source angular size for composite sources is defined as the largest angular size (las: see Section 2.3 of the reference paper) and it is computed as the maximum distance between the source components.

Contact Person

Questions regarding the ATESP1P4GH database table can be addressed to the HEASARC Help Desk.

Page Author: Browse Software Development Team
Last Modified: Monday, 16-Sep-2024 17:24:38 EDT