VLAECDFS1P4 ivo://nasa.heasarc/vlaecdfs1p4 NASA/GSFC HEASARC Miller et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source Deep radio observations at 1.4 GHz for the Extended Chandra Deep Field South were performed in 2007 June through September and presented in a first data release (Miller et al. 2008, ApJS, 179, 114). The survey was made using six separate pointings of the Very Large Array with over 40 hr of observation per pointing. In the current study, the authors improve on the data reduction to produce a second data release (DR2) mosaic image. This DR2 image covers an area of about a third of a square degree, reaches a best rms sensitivity of 6 µJy (µJy), and has a typical sensitivity of 7.4 uJy per 2.8" by 1.6" beam. The authors also present a more comprehensive catalog, including sources down to peak flux densities of five or more times the local rms noise, along with information on source sizes and relevant pointing data. In their paper, they discuss in some detail the consideration of whether sources are resolved under the complication of a radio image created as a mosaic of separate pointings, each suffering some degree of bandwidth smearing, and the accurate evaluation of the flux densities of such sources. Finally, the radio morphologies and optical/near-IR counterpart identifications are used to identify 17 likely multiple-component sources so as to arrive at a catalog of 883 radio sources (and also 49 individual components of the 17 multi-component sources), which is roughly double the number of sources contained in the first data release. In order to cover the full E-CDF-S area at near-uniform sensitivity, the authors pointed the VLA at six separate coordinate locations arranged in a hexagonal grid around the adopted center of the CDF-S, viz. RA, Dec (J2000) 03<sup>h</sup> 32<sup>m</sup> 28.00<sup>s</sup>, -27<sup>o</sup> 48' 30.0". The observations were spread over many days on account of the low declination of the field and typically amounted to 5 hr of time per calendar date. The details of the individual pointings are: <pre> Pointing ID R.A. (J2000) DE. (J2000) rms sensitivity for final image ECDFS 1 03:33:22.25 -27:48:30.0 10.5 uJy ECDFS 2 03:32:55.12 -27:38:03.0 9.4 uJy ECDFS 3 03:32:00.88 -27:38:03.0 9.7 uJy ECDFS 4 03:31:33.75 -27:48:30.0 9.5 uJy ECDFS 5 03:32:00.88 -27:58:57.0 10.0 uJy ECDFS 6 03:32:55.12 -27:58:57.0 9.3 uJy </pre> The images corresponding to the six individual pointings were combined to form the final mosaic image (shown in Figure 1 of the reference paper). This HEASARC table contains the catalog of 883 radio sources (Table 3 in the reference paper) and also the catalog of 49 individual components of the 17 multi-component sources (Table 4 in the reference paper), so that there are a total of 932 entries in the present table. To allow users to easily distinguish these types of entry, the HEASARC created a parameter type_flag which is set to 'S' for the 883 source entries and to 'C' for the 49 component entries. The HEASARC created names for the sources following the standard CDS and IAU recommendations for position-based names and using the prefix of '[MBF2013]' for Miller, Bonzini, Fomalont (2013), the first 3 authors and the date of publication of the reference paper. For the components, we have used the names based on the positions of the parent sources and the suffixes 'A', 'B', etc, in order of increasing J2000.0 RA. Thus, for the multi-component source [MBF2013] J033115.0-275518 which has 3 components, there are 4 entries in this table, one for the entire source, and one for each component, e.g.: <pre> Name | type_flag | RA (J2000.0) Dec (J2000.0) [MBF2013] J033115.0-275518 | S | 03 31 15.04 | -27 55 18.8 [MBF2013] J033115.0-275518 A| C | 03 31 13.99 | -27 55 19.9 [MBF2013] J033115.0-275518 B| C | 03 31 15.06 | -27 55 18.9 [MBF2013] J033115.0-275518 C| C | 03 31 17.05 | -27 55 15.2 </pre> The 17 sources thought to consist of multiple components associated with a single host object are each listed with a single aggregate integrated flux density. Gaussian fits to the individual components associated with these sources are separately listed for their components This table was created by the HEASARC in May 2013 based on <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/ApJS/205/13">CDS Catalog J/ApJS/205/13</a> files table3.dat and table4.dat. This is a service provided by NASA HEASARC . 2013ApJS..205...13M https://heasarc.gsfc.nasa.gov/W3Browse/all/vlaecdfs1p4.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=vlaecdfs1p4& GET text/xml 180 99999 true 52.99079167 -28.09113889 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=vlaecdfs1p4 GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_vlaecdfs1p4&Action=More+Options&Action=Parameter+Search&ConeAdd=1 RADIO CATALOG 0.0166666666666667 Radio public vlaecdfs1p4 VLA Extended-Chandra Deep Field-South 1.4-GHz Source Catalog name Source Designation meta.id;meta.main char nullable type_flag Flag [SC] Indicates Original Table Number: S=Table 3, C=Table 4 meta.code char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable flux_1p4_ghz Peak Flux Density at 1.4GHz mJy/beam phot.flux.density;em.radio.750-1500MHz double nullable flux_1p4_ghz_error Error in Peak Flux Density at 1.4GHz mJy/beam stat.error;phot.flux.density;em.radio.750-1500MHz double nullable int_flux_1p4_ghz Integrated Flux Density at 1.4GHz mJy phot.flux.density;em.radio.750-1500MHz double nullable int_flux_1p4_ghz_error Error in Integrated Flux Density at 1.4GHz mJy stat.error;phot.flux.density;em.radio.750-1500MHz double nullable flux_choice_flag Flag [IP] Indicates Prescription for Recommended Flux Density meta.code char nullable "__x_ra_dec" System unit vector column double nullable "__y_ra_dec" System unit vector column double nullable "__z_ra_dec" System unit vector column double nullable "__row" System index column char nullable contrib_pointing_ids Pointings Contributing to Mosaic Image at Source Position meta.id;obs char nullable lii Galactic Longitude degree pos.galactic.lon double nullable best_flux_1p4_ghz_error RMS at Source Position in Best Pointing mJy/beam stat.error;phot.flux.density;em.radio.750-1500MHz double nullable k_angular_size_limit Limit Flag for K08 1.4GHz Deconvolved Source Size phys.angSize char nullable source_flags Flag(s) [a-g] Indicate Notes on Source meta.code;src char nullable best_major_axis_lower Lower Limit to Major Axis Size in Best Pointing arcsec meta.code;phys.angSize.smajAxis double nullable extended_flag Boolean Flag [01] Indicates Whether Source was Resolved in Envelope Test meta.code;phys.angSize short nullable k_source_id Identification of Source in K08 meta.id.cross char nullable mosaic_major_axis Major Axis from Mosaic Image arcsec phys.angSize.smajAxis double nullable best_position_angle Position Angle in Best Pointing degree pos.posAng;src short nullable best_minor_axis_lower Lower Limit to Minor Axis Size in Best Pointing arcsec meta.code;phys.angSize.sminAxis double nullable bii Galactic Latitude degree pos.galactic.lat double nullable k_angular_size K08 1.4GHz Deconvolved Source Size arcsec phys.angSize double nullable snr_1p4_ghz Signal-to-Noise of Peak Flux Density stat.snr;phot.flux.density;em.radio.750-1500MHz double nullable multiple_source_number Multiple Component Number in Table 4 meta.id short nullable k_int_flux_1p4_ghz K08 Source 1.4GHz Flux Density mJy phot.flux.density;em.radio.750-1500MHz double nullable mosaic_minor_axis Minor Axis from Mosaic Image arcsec phys.angSize.sminAxis double nullable k_int_flux_1p4_ghz_error Error in K08 Source 1.4GHz Flux Density mJy stat.error;phot.flux.density;em.radio.750-1500MHz double nullable best_major_axis_upper Upper Limit to Major Axis Size in Best Pointing arcsec meta.code;phys.angSize.smajAxis double nullable mosaic_position_angle Position Angle from Mosaic Image degree pos.posAng;src short nullable best_pointing_id Index Number [1-6] of Pointing with Lowest RMS at Source Position meta.id;obs short nullable best_minor_axis_upper Upper Limit to Minor Axis Size in Best Pointing arcsec meta.code;phys.angSize.sminAxis double nullable