Chandra Deep Field-South 7-Megasecond X-Ray Source Catalog

Chandra Deep Field-South 7-Megasecond X-Ray Source Catalog CHANDFS7MS ivo://nasa.heasarc/chandfs7ms NASA/GSFC HEASARC Luo et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source This table contains the X-ray source catalogs for the ~7 Ms exposure of the Chandra Deep Field-South (CDF-S), which covers a total area of 484.2 square arcminutes. Utilizing WAVDETECT for initial source detection and ACIS Extract for photometric extraction and significance assessment, the authors have created a main source catalog (entries with source_sample = 'M' in this HEASARC table) containing 1,008 sources that are detected in up to three X-ray bands: 0.5-7.0 keV, 0.5-2.0 keV, and 2-7 keV. A supplementary source catalog entries with source_sample = 'S' in this HEASARC table) is also provided, including 47 lower-significance sources that have bright (Ks <~ 23m) near-infrared (NIR) counterparts. The authors have identified multiwavelength counterparts for 992 (98.4%) of the 1,008 main-catalog sources, and they have collected redshifts for 986 of these sources, including 653 spectroscopic redshifts and 333 photometric redshifts. Based on the X-ray and multiwavelength properties, the authors have identified 711 active galactic nuclei (AGNs) from the main-catalog sources. Compared to the previous ~4 Ms CDF-S catalogs, 291 of the main-catalog sources are new detections. The observations utilized in this survey have achieved unprecedented X-ray sensitivity with average flux limits over the central ~1 arcmin2 region of ~1.9 x 10-17, 6.4 x 10-18, and 2.7 x 10-17 erg cm-2 s-1 in the three X-ray bands, respectively. In the reference paper, the authors provide cumulative number-count measurements observing, for the first time, that normal galaxies start to dominate the X-ray source population at the faintest 0.5-2.0 keV flux levels. The highest X-ray source density reaches ~50,500 deg-2, and 47% +/- 4% of these sources are AGNs (~23,900 deg-2). The authors adopted a binomial no-source probability value, PB < 0.007 as the criterion to prune their initial candidate source list and generate a main source catalog, which includes 1,008 sources with a ~97% multiwavelength-identification rate. This adopted PB threshold will have inevitably rejected real X-ray sources. To recover some of these real sources, the authors created a supplementary source catalog that contains lower-significance X-ray sources that have bright optical/NIR counterparts; the chance of a bright optical/NIR source being associated with a spurious X-ray detection is quite small. A total of 47 candidate CDF-S sources having 0.007 <= PB < 0.1 are associated with bright, Ks <= 23m, TENIS sources, where the false-match rate is only 1.7%, and these 47 sources constitute the supplementary catalog. A Galactic column density of NH,Gal = 8.8 * 1019 cm-2 along the line of sight to the CDF-S is assumed in this study. All quoted magnitudes are in the AB system. A cosmology with H0 = 67.8 km s-1 Mpc-1, OmegaM = 0.308, and OmegaLambda = 0.692 (Planck Collaboration et al. 2016 values) is used to calculate luminosities. This HEASARC table contains the 1,008 sources from the main Chandra source catalog (these entries are identified by the HEASARC-created source_sample parameter being set to 'M' in this table) and the 47 lower-significance sources from the supplementary NIR-bright Chandra source catalog (these entries are identified by the HEASARC-created source_sample parameter being set to 'S' in this table). This table thus has 1,055 entries. This table was created by the HEASARC in March 2017 based upon electronic versions of Tables 4 and 5, the 'Main Chandra Source Catalog' and the 'Supplementary NIR-Bright Chandra Source Catalog', respectively, which were obtained from the ApJS website. Some of the values for the name parameter in the HEASARC's implementation of this table were corrected in April 2018. This is a service provided by NASA HEASARC . 2017ApJS..228....2L https://heasarc.gsfc.nasa.gov/W3Browse/all/chandfs7ms.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=chandfs7ms& GET text/xml 180 99999 true 53.125808 -28.005221 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=chandfs7ms GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_chandfs7ms&Action=More+Options&Action=Parameter+Search&ConeAdd=1 CHANDRA 0.0166666666666667 Infrared Optical Radio X-ray public chandfs7ms Chandra Deep Field-South 7-Megasecond X-Ray Source Catalog source_sample Flag Indicates Published Table/Sample from Which Entry Originates meta.ref;meta.table char nullable name Source Designation 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 error_radius 1-Sigma Positional Uncertainty arcsec stat.error;pos double nullable fb_counts Full (0.5-8keV) Band Aperture-Corrected Source Counts ct phot;em.X-ray double nullable fb_counts_neg_err Lower Uncertainty for Full-Band Counts ct stat.error;phot;em.X-ray double nullable fb_counts_pos_err Upper Uncertainty for Full-Band Counts ct stat.error;phot;em.X-ray double nullable redshift Adopted Redshift src.redshift double nullable redshift_neg_err Lower Uncertainty for Adopted Redshift stat.error;src.redshift double nullable redshift_pos_err Upper Uncertainty for Adopted Redshift stat.error;src.redshift double nullable fb_flux Full X-Ray Band Flux erg/s/cm^2 phot.flux;em.X-ray double nullable fb_exposure Full-Band Effective Exposure Time s time.duration;obs.exposure;em.X-ray double nullable log_min_ns_prob Logarithm of Final Binomial No-Source Probability stat.probability double nullable spect_redshift_flag Quality of Spectroscopic Redshift: Secure or Insecure) meta.code;src.redshift char nullable x16_source_number Matched 250-ks E-CDF-S Source Identification, Xue et al. (2016ApJS..224...15X) meta.id.cross char nullable vla_20_cm_mag VLA 1.4-GHz AB Magnitude mag phot.mag;em.radio.750-1500MHz double nullable hb_exposure Hard-Band Effective Exposure Time s time.duration;obs.exposure;em.X-ray.medium double nullable photon_index_pos_err Upper Uncertainty for Gamma stat.error;spect.index;em.X-ray double nullable candels_dec CANDELS Declination degree pos.eq.dec;em.IR.J double nullable wfi_ra WFI Right Ascension degree pos.eq.ra;em.opt.R double nullable ref_redshift Reference Code for the Adopted Redshift meta.ref;src.redshift char nullable bii Galactic Latitude degree pos.galactic.lat double nullable gems_ra GEMS Right Ascension degree pos.eq.ra;em.opt double nullable candels_f125w_mag CANDELS+ 3D-HST WFC3/F125W Magnitude mag phot.mag;em.IR.J double nullable rf_lx Apparent Rest-Frame 0.5-7.0keV Luminosity, uncorrected erg/s phys.luminosity;em.X-ray double nullable phot_redshift_s14 Photometric Redshift, Skelton et al. (2014ApJS..214...24S) src.redshift.phot double nullable class Browse Object Classification src.class short nullable wfi_rmag WFI R-Band Magnitude mag phot.mag;em.opt.R double nullable broad_type X-Ray Object Type (AGN, Star or Galaxy) src.class char nullable goodss_ra GOODS-S Right Ascension degree pos.eq.ra;em.opt.I double nullable lii Galactic Longitude degree pos.galactic.lon double nullable gems_dec GEMS Declination degree pos.eq.dec;em.opt double nullable spect_redshift Spectroscopic Redshift src.redshift double nullable xid_source_number X-Ray Source Identification meta.id;src short nullable ctrpart_catalog Primary Counterpart Catalog meta.ref;meta.table char nullable tenis_ks_mag TENIS Ks-Band Magnitude mag phot.mag;em.IR.K double nullable log_min_fp_prob Logarithm of Minimum WAVDETECT False-Positive Probability stat.probability short nullable sb_flux Soft X-Ray Band Flux erg/s/cm^2 phot.flux;em.X-ray.soft double nullable phot_redshift_h14 Photometric Redshift, Hsu et al. (2014ApJ...796...60H) src.redshift.phot double nullable sb_counts_neg_err Lower Uncertainty for Soft-Band Counts ct stat.error;phot;em.X-ray.soft double nullable goodss_dec GOODS-S Declination degree pos.eq.dec;em.opt.I double nullable tenis_dec TENIS Declination degree pos.eq.dec;em.IR.K double nullable seds_ra SEDS Right Ascension degree pos.eq.ra;em.IR.3-4um double nullable abs_corr_lx Absorption-Corrected Intrinsic 0.5-7.0keV Luminosity erg/s phys.luminosity;em.X-ray double nullable x11_source_number Matched 4-Ms CDF-S Source Identification, Xue et al. (2011ApJS..195...10X) meta.id.cross char nullable photon_index Effective Power-Law Photon Index, Gamma spect.index;em.X-ray double nullable sb_exposure Soft-Band Effective Exposure Time s time.duration;obs.exposure;em.X-ray.soft double nullable band_ratio_pos_err Upper Uncertainty for Band Ratio stat.error;phot.count;arith.ratio;em.X-ray double nullable ref_spect_redshift Reference Code for Spectroscopic Redshift meta.ref;src.redshift short nullable wfi_dec WFI Declination degree pos.eq.dec;em.opt.R double nullable alt_name Alternative Catalog-Based Source Designation meta.id char nullable ctrpart_note Counterpart Notes on Individual Sources meta.note char nullable phot_redshift_l10 Photometric Redshift, Luo et al. (2010ApJS..187..560L) src.redshift.phot double nullable hb_counts_pos_err Upper Uncertainty for Hard-Band Counts ct stat.error;phot;em.X-ray.medium double nullable nh Intrinsic Absorption Column Density cm^-2 phys.columnDensity double nullable gems_zmag GEMS HST z-Band Magnitude mag phot.mag;em.opt double nullable hb_counts Hard (2-8keV) Band Aperture-Corrected Source Counts ct phot;em.X-ray.medium double nullable tenis_ra TENIS Right Ascension degree pos.eq.ra;em.IR.K double nullable hb_flux Hard X-Ray Band Flux erg/s/cm^2 phot.flux;em.X-ray.medium double nullable phot_redshift_r11 Photometric Redshift, Rafferty et al. (2011ApJ...742....3R) src.redshift.phot double nullable vla_ra VLA Right Ascension degree pos.eq.ra;em.radio.750-1500MHz double nullable phot_redshift_s16 Photometric Redshift, Straatman et al. (2016ApJ...830...51S) src.redshift.phot double nullable band_ratio_neg_err Lower Uncertainty for Band Ratio stat.error;phot.count;arith.ratio;em.X-ray double nullable band_ratio X-Ray Band-Ratio phot.count;arith.ratio;em.X-ray double nullable goodss_zmag GOODS-S HST version r2.0z z-Band Magnitude mag phot.mag;em.opt.I double nullable seds_3p6_um_mag SEDS Spitzer/IRAC 3.6-um Magnitude mag phot.mag;em.IR.3-4um double nullable phot_redshift_s15 Photometric Redshift, Santini et al. (2015ApJ...801...97S) src.redshift.phot double nullable hb_counts_neg_err Lower Uncertainty for Hard-Band Counts ct stat.error;phot;em.X-ray.medium double nullable candels_ra CANDELS Right Ascension degree pos.eq.ra;em.IR.J double nullable off_axis Off-Axis Angle, Source to Aim Point arcmin instr.offset double nullable photon_index_neg_err Lower Uncertainty for Gamma stat.error;spect.index;em.X-ray double nullable vla_dec VLA Declination degree pos.eq.dec;em.radio.750-1500MHz double nullable sb_counts Soft (0.5-2keV) Band Aperture-Corrected Source Counts ct phot;em.X-ray.soft double nullable sb_counts_pos_err Upper Uncertainty for Soft-Band Counts ct stat.error;phot;em.X-ray.soft double nullable source_flag Flag Indicates Photometric Note on Individual Source meta.code;src char nullable r13_source_number Matched 3-Ms XMM-Newton CDF-S Source Identification meta.id.cross short nullable seds_dec SEDS Declination degree pos.eq.dec;em.IR.3-4um 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 off_set Positional Offset, X-Ray Source to Primary Counterpart arcsec pos.angDistance double nullable