VLA Coma Cluster of Galaxies 1.4-GHz Source Catalog

VLA Coma Cluster of Galaxies 1.4-GHz Source Catalog VLACOMACAT ivo://nasa.heasarc/vlacomacat NASA/GSFC HEASARC Miller et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source This table contains results from deep 1.4-GHz Very Large Array (VLA) radio continuum observations of two ~0.5 deg2 fields in the Coma cluster of galaxies. The two fields, "Coma 1" and "Coma 3", correspond to the cluster core and the southwest infall region, and were selected on account of abundant pre-existing multiwavelength data. In their most sensitive regions, the radio data reach 0.022 mJy (22 µJy) rms per 4.4" beam, sufficient to detect (at 5-sigma) Coma member galaxies with L1.4GHz = 1.3 x 1020 W Hz-1 (1.3 x 1027 erg s-1 Hz-1). The full catalog of radio detections at and above a 4.5-sigma significance threshold is presented herein; there are 1030 of these sources which are detected at >= 5 sigma, 628 of which are within the combined Coma 1 and Coma 3 area. The authors also provide optical identifications of the radio sources using data from the Sloan Digital Sky Survey (SDSS). The depth of the radio observations allows them to detect active galactic nuclei in cluster elliptical galaxies with Mr < -20.5 (AB magnitudes), including radio detections for all cluster ellipticals with Mr < -21.8. At fainter optical magnitudes (-20.5 < Mr <~ -19), the radio sources are associated with star-forming galaxies with star formation rates as low as 0.1M_{sun}_ yr-1. The VLA observations were performed over five days in 2006 June as program code AM868. On each of the five days, the scheduled time was centered on the transit of Coma. This table was created by the HEASARC in December 2011 based on <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/AJ/137/4436">CDS catalog J/AJ/137/4436</a> files table2.dat ('The Radio Source Catalog') and table3.dat ('Optical Counterparts to the Radio Sources'). It does not include table4.dat ('Rejected Optical Counterparts to the Radio Sources'). This is a service provided by NASA HEASARC . 2009AJ....137.4436M https://heasarc.gsfc.nasa.gov/W3Browse/all/vlacomacat.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=vlacomacat& GET text/xml 180 99999 true 194.18066667 26.56891667 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=vlacomacat GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_vlacomacat&Action=More+Options&Action=Parameter+Search&ConeAdd=1 RADIO CATALOG 0.0166666666666667 Radio public vlacomacat VLA Coma Cluster of Galaxies 1.4-GHz Source Catalog name Source Identification ([MHM2009c] CNA-NNN) meta.id;meta.main char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable flux_20_cm Peak Flux Density at 1.4GHz mJy phot.flux.density;em.radio.750-1500MHz double nullable rms_20_cm Local RMS as Evaluated in a 5-arcmin Square Box Centered on Position mJy stat.error;phot.flux.density;em.radio.750-1500MHz double nullable int_flux_20_cm Integral Flux Density at 1.4GHz mJy phot.flux.density;em.radio.750-1500MHz double nullable int_flux_20_cm_error Error in Integral Flux Density at 1.4GHz mJy stat.error;phot.flux.density;em.radio.750-1500MHz double nullable sdss_ra SDSS Right Ascension degree pos.eq.ra double nullable sdss_dec SDSS Declination degree pos.eq.dec double nullable rmag SDSS r Band Model Magnitude mag phot.mag;em.opt.R double nullable imag SDSS i Band Model Magnitude mag phot.mag;em.opt.I double nullable snr_flag Flag [bc] Indicates Whether or Not S/N Ratio Indicates Detection meta.code char nullable gmag SDSS g Band Model Magnitude mag phot.mag;em.opt.B double nullable lii Galactic Longitude degree pos.galactic.lon double nullable note_flag Flag Indicates Notes in notes.dat File meta.note char nullable sdss_phot_class SDSS Optical Counterpart Photometric Class src.class short nullable vla_sdss_offset Radio/SDSS Optical Counterpart Separation arcsec pos.angDistance;em.X-ray;em.opt double nullable resolved Flag [YN] Indicates Source Resolved meta.code char nullable zmag SDSS z Band Model Magnitude mag phot.mag;em.opt.I double nullable bii Galactic Latitude degree pos.galactic.lat double nullable comment_1 Additional Comment Concerning Source meta.note char nullable comment_2 Additional Comments Concerning Source meta.note char nullable umag SDSS u Band Model Magnitude mag phot.mag;em.opt.U double nullable resolved_flag Flag [a] Indicates Flux Determined Using Irregularly-Shaped Aperture meta.code char nullable near_edge Flag [YN] Indicates Source within ~2.5-arcmin of Radio Mosaic Edge meta.code char nullable snr Signal-to-Noise of Fitted Peak stat.snr double 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