VLA23901P4 - VLA A2390 Cluster of Galaxies 1.4-GHz Source Catalog

Overview

This table contains the 1.4-GHz source catalog for the field of the cluster of galaxies A2390 as observed with the Very Large Array (VLA). This is one of the deepest radio images of a cluster field ever taken. The image covers an area of 34' x 34' with a synthesized beam of ~1.4" and a noise level of ~5.6 µJy (µJy) near the field center. In the reference paper, the authors construct differential number counts for the central regions (radius < 16') of this cluster, and find that the faint (S_1.4GHz < 3 mJy) counts of A2390 are roughly consistent with the lowest blank field number counts. Their analyses indicate that the number counts are primarily from field radio galaxies. The authors suggest that the disagreement of their number counts for this cluster with those from a similarly deep observation of A370 that was also presented in the reference paper can be largely attributed to cosmic variance.

The authors observed the A2390 cluster field with the VLA in the A configuration for ~31.4hr on-source during 2008 October. The field center is located at 21:53:36 +17:41:52 (J2000).

Catalog Bibcode

2012ApJS..202....2W

References

Very Large Array 1.4 GHz catalogs of the A370 and A2390 cluster fields.
    Wold I.G.B., Owen F.N., Wang W.-H., Barger A.J., Keenan R.C.
   <Astrophys. J. Suppl. Ser., 202, 2 (2012)>
   =2012ApJS..202....2W

Provenance

This table was created by the HEASARC in August 2017 based on CDS Catalog J/ApJS/202/2/ file table2.dat. This file contained 699 entries for sources detected at 1.4 GHz in the A370 field, as well as 524 entries for sources detected at 1.4 GHz in the A2390 field. Only the latter are included in this HEASARC table, while the former can be found in the HEASARC's VLA3701P4 table.

Parameters

Source_Number
A unique identification number for each source in the catalog from 0 to 523.

Name
The preferred IAU source designation for the radio source using the '[WOW2012] A2390' prefix recommended by the CDS Dictionary of Nomenclature of Celestial Objects and the source number value, e.g., '[WOW2012] A2390 0'.

RA
The Right Ascension of the radio source in the selected equinox. This was given in J2000.0 coordinates to a precision of 0.01 seconds of time in the original table.

RA_Error
The uncertainty in the Right Ascension of the radio source, in arcseconds.

Dec
The Declination of the radio source in the selected equinox. This was given in J2000.0 coordinates to a precision of 0.01 arcseconds in the original table.

Dec_Error
The uncertainty in the Declination of the radio source, in arcseconds.

LII
The Galactic Longitude of the radio source.

BII
The Galactic Latitude of the radio source.

SNR_1p4_GHz
The peak 1.4-GHz signal-to-noise ratio (SNR) of the radio source.

Int_Flux_1p4_GHz
The total flux density of the radio source at 1.4 GHz, in mJy (converted by the HEASARC from the uJy units used in the original table).

Int_Flux_1p4_GHz_Error
The uncertainty in the total flux density of the radio source at 1.4 GHz, in mJy (converted by the HEASARC from the uJy units used in the original table).

Major_Axis
For resolved sources, the best-fit deconvolved Gaussian major axis (FWHM) of the radio source, in arcseconds.

Minor_Axis
For resolved sources, the best-fit deconvolved Gaussian minor axis (FWHM) of the radio source, in arcseconds.

Position_Angle
For resolved sources, the best-fit position angle of the major axis of the radio source, in degrees

Size_Constraint
This parameter is the major axis upper limit, in arcseconds, for unresolved sources, or the maximum size, in arcseconds, for very resolved sources.

Beam_Size
The beam size (resolution) of the image used in the source extraction, in arcseconds.

Contact Person

Questions regarding the VLA23901P4 database table can be addressed to the HEASARC Help Desk.

Page Author: Browse Software Development Team
Last Modified: Monday, 16-Sep-2024 17:36:05 EDT