Chandra Extended Deep Field South Survey Point Source Catalog

Chandra Extended Deep Field South Survey Point Source Catalog ChanDFSS ivo://nasa.heasarc/chanextdfs NASA/GSFC HEASARC Lehmer et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source This table contains the combined point-source catalogs for the Extended Chandra Deep Field- South (E-CDF-S) survey. The E-CDF-S consists of four contiguous 250 ks Chandra observations covering an approximately square region of total solid angle ~0.3 square degrees, which flank the existing ~1 Ms Chandra Deep Field-South (CDF-S). The survey reaches sensitivity limits of ~1.1 x 10-16 and ~6.7 x 10-16 ergs cm-2 s-1 for the 0.5-2.0 and 2-8 keV bands, respectively. 762 distinct X-ray point sources are detected within the E-CDF-S exposure; 589 of these sources are new (i.e., not previously detected in the ~1 Ms CDF-S). This brings the total number of X-ray point sources detected in the E-CDF-S region to 915 (via the E-CDF-S and ~1 Ms CDF-S observations). Source positions are determined using matched-filter and centroiding techniques; the median positional uncertainty is ~0.35". The basic X-ray and optical properties of these sources indicate a variety of source types, although absorbed active galactic nuclei (AGNs) seem to dominate. In addition to the main Chandra catalog, this table contains the supplementary source catalog with 33 lower-significance X-ray point sources that have bright optical counterparts (R < 23 mag). These sources generally have X-ray-to-optical flux ratios expected for normal and starburst galaxies, which lack a strong AGN component. The basic number-count results for the main Chandra catalog are in good agreement with the ~1 Ms CDF-S for sources with 0.5-2.0 and 2-8 keV fluxes greater than 3 x 10-16 and 1 x 10-15 ergs cm-2 s-1, respectively. This HEASARC table contains 809 entries: 762 entries corresponding to the 762 sources listed in the main catalog (Table 2 of the published paper), 14 sources from the cross-field source list (Table 3) which give properties for sources which were detected in more than one observational sources, e.g. there are two entries for the source with source_number = 367, one entry coming from the main catalog, the other entry from the cross-field catalog, and 33 entries corresponding to the 33 sources in the supplementary, optically bright source catalog (Table 6). The HEASARC has created a new parameter called source_type to identify from which of these 3 original tables any given entry comes from; it is set to 'main', 'crossfield' and 'supplement' for entries from Tables 2, 3, and 6, respectively. This online catalog was created by the HEASARC in January 2006 based on machine-readable versions of tables 2, 3, and 6 from the paper which were obtained from the ApJ website. This is a service provided by NASA HEASARC . 2005ApJS..161...21L https://heasarc.gsfc.nasa.gov/W3Browse/all/chanextdfs.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=chanextdfs& GET text/xml 180 99999 true 53.21666667 -28.10272222 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=chanextdfs GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_chanextdfs&Action=More+Options&Action=Parameter+Search&ConeAdd=1 CHANDRA 0.0166666666666667 X-ray public chanextdfs Chandra Extended Deep Field South Survey Point Source Catalog name Source Designation meta.id;meta.main char nullable source_type Published Table Identifier for Source meta.id;meta.table 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 Positional Uncertainty (arcsec) arcsec stat.error;pos float nullable fb_counts_limit Full-Band Counts Upper Limit Flag meta.code;phot;em.X-ray.medium char nullable fb_counts Full-Band Counts ct phot;em.X-ray.medium double nullable fb_counts_neg_err Full-Band Counts Lower Error ct stat.error;phot;em.X-ray.medium double nullable fb_counts_pos_err Full-Band Counts Upper Error ct stat.error;phot;em.X-ray.medium double nullable fb_flux_limit Full-Band Flux Upper Limit Flag meta.code;phot.flux;em.X-ray;stat.max char nullable fb_flux Full-Band Flux (erg/s/cm^2) erg/s/cm^2 phot.flux;em.X-ray 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 band_ratio Band Ratio (Hard Counts/Soft Counts) phot.count;arith.ratio;em.X-ray double nullable photon_index_limit Photon Index Upper or Lower Limit Flag meta.code;spect.index char nullable a03_source_number A03 CDFS Source Identification Number meta.id.assoc short nullable hb_counts_pos_err Hard-Band Counts Upper Error ct stat.error;phot;em.X-ray.medium double nullable sb_counts_limit Soft-Band Counts Upper Limit Flag meta.code;phot;em.X-ray.soft char nullable sb_counts_pos_err Soft-Band Counts Upper Error ct stat.error;phot;em.X-ray.soft double nullable ra_optical_j2000 J2000 Right Ascension of Optical Counterpart meta.id.assoc;pos.eq.ra char nullable sb_exposure Soft-Band Effective Exposure Time (s) s time.duration;obs.exposure double nullable g02_source_number G02 CDFS Source Identification Number meta.id.assoc short nullable photon_index Photon Index spect.index double nullable sb_counts Soft-Band Counts ct phot;em.X-ray.soft double nullable notes Additional Notes meta.code char nullable g02_dec_j2000 J2000 Declination of G02 Source meta.id.assoc;pos.eq.dec char nullable bii Galactic Latitude degree pos.galactic.lat double nullable sb_flux_limit Soft-Band Flux Upper Limit Flag meta.code;phot.flux;em.X-ray.soft;stat.max char nullable band_ratio_pos_err Band Ratio Upper Error stat.error;phot.count;arith.ratio;em.X-ray double nullable hb_flux_limit Hard-Band Flux Upper Limit Flag meta.code;phot.flux;em.X-ray char nullable hb_counts Hard-Band Counts ct phot;em.X-ray.medium double nullable a03_dec_j2000 J2000 Declination of A03 CDFS Source meta.id.assoc;pos.eq.dec char nullable hb_counts_limit Hard-Band Counts Upper Limit Flag meta.code;phot;em.X-ray.medium char nullable sb_flux Soft-Band Flux (erg/s/cm^2) erg/s/cm^2 phot.flux;em.X-ray.soft double nullable hb_counts_neg_err Hard-Band Counts Lower Error ct stat.error;phot;em.X-ray.medium double nullable band_ratio_limit Band Ratio Upper or Lower Limit Flag meta.code;phot.count;arith.ratio;em.X-ray char nullable source_number Source Identification Number meta.id short nullable sb_counts_neg_err Soft-Band Counts Lower Error ct stat.error;phot;em.X-ray.soft double nullable log_min_fp_prob Logarithm of the Minimum False-Positive Probability stat.likelihood short nullable dec_optical_j2000 J2000 Declination of Optical Counterpart meta.id.assoc;pos.eq.dec char nullable hb_exposure Hard-Band Effective Exposure Time (s) s time.duration;obs.exposure double nullable photon_index_pos_err Photon Index Upper Error stat.error;spect.index double nullable a03_ra_j2000 J2000 Right Ascension of A03 CDFS Source meta.id.assoc;pos.eq.ra char nullable rmag R Band Magnitude mag phot.mag;em.opt.R double nullable g02_ra_j2000 J2000 Right Ascension of G02 Source meta.id.assoc;pos.eq.ra char nullable exposure Full-Band Effective Exposure Time (s) s time.duration;obs.exposure double nullable lii Galactic Longitude degree pos.galactic.lon double nullable hb_flux Hard-Band Flux (erg/s/cm^2) erg/s/cm^2 phot.flux;em.X-ray double nullable photon_index_neg_err Photon Index Lower Error stat.error;spect.index double nullable off_axis_angle Off-Axis Angle (arcmin) arcmin instr.offset float nullable band_ratio_neg_err Band Ratio Lower Error stat.error;phot.count;arith.ratio;em.X-ray double nullable off_set Offset between Optical and X-ray Positions (arcsec) arcsec pos.angDistance double nullable ecdfs_field E-CDF-S Field Identification meta.id;obs.field short nullable