DEEP2 Galaxy Redshift Survey Fields Chandra Point Source Catalog

DEEP2 Galaxy Redshift Survey Fields Chandra Point Source Catalog XDEEP2 ivo://nasa.heasarc/xdeep2 NASA/GSFC HEASARC Goulding et al. 2026-04-03 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source This table contains the X-ray point-source catalog produced from the Chandra Advanced CCD Imaging Spectrometer (ACIS-I) observations of the combined ~3.2 deg2 DEEP2 (XDEEP2) survey fields, which consist of four ~ 0.7 - 1.1 deg2 fields. The combined total exposures across all four XDEEP2 fields range from ~ 10 ks to 1.1 Ms. The authors detect X-ray point sources in both the individual ACIS-I observations and the overlapping regions in the merged (stacked) images. They find a total of 2976 unique X-ray sources within the survey area with an expected false-source contamination of ~ 30 sources (<~ 1%). In their paper, the authors present the combined log N-log S distribution of sources detected across the XDEEP2 survey fields and find good agreement with the Extended Chandra Deep Field and Chandra-COSMOS fields to f_(X,0.5-2keV)_ ~ 2 x 10-16 erg cm-1 s-1. Given the large survey area of XDEEP2, they additionally place relatively strong constraints on the log N-log S distribution at high fluxes (f_(X,0.5-2keV) ~ 3 x 10-14 erg cm-1 s-1), and find a small systematic offset (a factor ~ 1.5) toward lower source numbers in this regime, when compared to smaller area surveys. The number counts observed in XDEEP2 are in close agreement with those predicted by X-ray background synthesis models. Additionally, the authors present a Bayesian-style method for associating the X-ray sources with optical photometric counterparts in the DEEP2 catalog (complete to RAB < 25.2) and find that 2126 (~ 71.4% +/- 2.8%) of the 2976 X-ray sources presented here have a secure optical counterpart with a <~ 6% contamination fraction. The present table provides the DEEP2 optical source properties (e.g., magnitude, redshift) as part of the X-ray-optical counterpart catalog. This table was created by the HEASARC in October 2012 based on electronic versions of Tables 5 and 7 from the reference paper which were obtained from the ApJS web site. This is a service provided by NASA HEASARC . 2012ApJS..202....6G https://heasarc.gsfc.nasa.gov/W3Browse/all/xdeep2.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=xdeep2& GET text/xml 180 99999 true 353.33075 -0.13539 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=xdeep2 GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_xdeep2&Action=More+Options&Action=Parameter+Search&ConeAdd=1 CHANDRA 0.0166666666666667 Optical X-ray public xdeep2 DEEP2 Galaxy Redshift Survey Fields Chandra Point Source Catalog csc_name Chandra Source Catalog Identifier meta.id.cross char nullable rmag R-Band AB Magnitude mag phot.mag;em.opt.R double nullable fb_counts_90pc_eef Net Full (0.5-7 keV) Counts in R90 ct phot;em.X-ray double nullable field_number DEEP2 Field Identifier meta.id;obs.field short nullable hb_counts_50pc_eef_error Uncertainty in Net Hard (2-7 keV) Counts in R50 ct stat.error;phot;em.X-ray.medium double nullable radius_50pc_eef Radius at 50% ACIS-I Effective Area (R50) arcsec instr.det.psf double nullable sb_counts_50pc_eef Net Soft (0.5-2 keV) Counts in R50 ct phot;em.X-ray.soft double nullable hb_counts_90pc_eef Net Hard (2-7 keV) Counts in R90 ct phot;em.X-ray.medium double nullable hb_flux_limit Limit Flag for Hard (2-7 keV) Flux meta.code;phot.flux;em.X-ray.medium char nullable lii Galactic Longitude degree pos.galactic.lon double nullable hardness_ratio Hardness Ratio, (H-S)/(H+S) phot.flux;arith.ratio;em.X-ray double nullable hb_counts_90pc_eef_error Uncertainty in Net Hard (2-7 keV) Counts in R90 ct stat.error;phot;em.X-ray.medium double nullable fb_flux_error Uncertainty in Full Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray double nullable flux_ratio Ratio of Hard Flux to Soft Flux phot.flux;arith.ratio;em.X-ray double nullable sb_counts_90pc_eef_limit Limit Flag for Net Soft (0.5-2 keV) Counts in R90 meta.code;phot;em.X-ray.soft char nullable sb_counts_50pc_eef_limit Limit Flag for Net Soft (0.5-2 keV) Counts in R50 meta.code;phot;em.X-ray.soft char nullable error_radius Centroid Positional Error arcsec stat.error;pos double nullable sb_counts_50pc_eef_error Uncertainty in Net Soft (0.5-2 keV) Counts in R50 ct stat.error;phot;em.X-ray.soft double nullable sb_flux_error Uncertainty in Soft Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray.soft double nullable bii Galactic Latitude degree pos.galactic.lat double nullable hardness_ratio_lower Lower 1-Sigma Limit Uncertainty in Hardness Ratio phot.flux;stat.min;arith.ratio;em.X-ray double nullable hb_flux_error Uncertainty in Hard Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray.medium double nullable hb_flux Hard (2-7 keV) Flux erg/s/cm^2 phot.flux;em.X-ray.medium double nullable off_set Angular Separation Between Optical and X-Ray Positions arcsec pos.angDistance double nullable "__row" System index column char nullable "__z_ra_dec" System unit vector column double nullable name Unique DEEP2 Source Identifier meta.id;meta.main char nullable fb_counts_50pc_eef_limit Limit Flag for Net Full (0.5-7 keV) Counts in R50 meta.code;phot;em.X-ray char nullable bmag B-Band AB Magnitude mag phot.mag;em.opt.B double nullable field_subfield_id DEEP2 ObsID/Sub-Field meta.id;obs.field char nullable off_axis Off-Axis Distance of X-Ray Source from Aim-Point of Observations arcmin instr.offset double nullable fb_counts_90pc_eef_error Uncertainty in Net Full (0.5-7 keV) Counts in R90 ct stat.error;phot;em.X-ray double nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable hb_counts_50pc_eef Net Hard (2-7 keV) Counts in R50 ct phot;em.X-ray.medium double nullable flux_ratio_lower Lower 1-Sigma Limit Uncertainty in Flux Ratio phot.flux;stat.min;arith.ratio;em.X-ray double nullable sb_counts_90pc_eef_error Uncertainty in Net Soft (0.5-2 keV) Counts in R90 ct stat.error;phot;em.X-ray.soft double nullable hb_counts_50pc_eef_limit Limit Flag for Net Hard (2-7 keV) Counts in R50 meta.code;phot;em.X-ray.medium char nullable redshift Optical Counterpart Redshift src.redshift double nullable bayesian_galaxy_prob Bayesian Probability of Being a Galaxy Based on R-Band Image percent stat.probability double nullable dec Declination degree pos.eq.dec;meta.main double nullable "__x_ra_dec" System unit vector column double nullable fb_counts_50pc_eef Net Full (0.5-7 keV) Counts in R50 ct phot;em.X-ray double nullable fb_flux Full (0.5-7 keV) Flux erg/s/cm^2 phot.flux;em.X-ray double nullable hb_counts_90pc_eef_limit Limit Flag for Net Hard (2-7 keV) Counts in R90 meta.code;phot;em.X-ray.medium char nullable flux_ratio_upper Upper 1-Sigma Limit Uncertainty in Flux Ratio phot.flux;stat.max;arith.ratio;em.X-ray double nullable sb_flux_limit Limit Flag for Soft (0.5-2 keV) Flux meta.code;phot.flux;em.X-ray.soft char nullable "__y_ra_dec" System unit vector column double nullable fb_flux_limit Limit Flag for Full (0.5-7 keV) Flux meta.code;phot.flux;em.X-ray char nullable radius_90pc_eef Radius at 90% ACIS-I Effective Area (R90) arcsec instr.det.psf double nullable opt_dec Optical Declination degree pos.eq.dec;em.opt double nullable sb_flux Soft (0.5-2 keV) Flux erg/s/cm^2 phot.flux;em.X-ray.soft double nullable imag I-Band AB Magnitude mag phot.mag;em.opt.I double nullable fb_counts_90pc_eef_limit Limit Flag for Net Full (0.5-7 keV) Counts in R90 meta.code;phot;em.X-ray char nullable hardness_ratio_upper Upper 1-Sigma Limit Uncertainty in Hardness Ratio phot.flux;stat.max;arith.ratio;em.X-ray double nullable opt_ra Optical Right Ascension degree pos.eq.ra;em.opt double nullable fb_counts_50pc_eef_error Uncertainty in Net Full (0.5-7 keV) Counts in R50 ct stat.error;phot;em.X-ray double nullable opt_source_number Coil et al. 2004 DEEP2 Optical Source meta.id.cross char nullable sb_counts_90pc_eef Net Soft (0.5-2 keV) Counts in R90 ct phot;em.X-ray.soft double nullable