AEGIS-X Chandra Extended Groth Strip X-Ray Point Source Catalog

AEGIS-X Chandra Extended Groth Strip X-Ray Point Source Catalog AEGISX ivo://nasa.heasarc/aegisx NASA/GSFC HEASARC Laird et al. 2026-07-17 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source This table contains the X-ray sources detected in the AEGIS-X survey, a series of deep Chandra ACIS-I observations of the Extended Groth Strip (EGS). The survey comprises pointings at eight separate positions, each with nominal exposure of 200 ks, covering a total area of approximately 0.67 deg2 in a strip of length 2 degrees. In their paper, the authors describe in detail an updated version of the data reduction and point-source-detection algorithms used to analyze these data. A total of 1325 band-merged sources have been found to a Poisson probability limit of 4 x 10-6, with limiting fluxes of 5.3 x 10-17 erg cm-2 s-1 in the soft (0.5 - 2 keV) band and 3.8 x 10-16 erg cm-2 s-1 in the hard (2 - 10 keV) band. They present simulations verifying the validity of their source-detection procedure and showing a very small, <1.5%, contamination rate from spurious sources. Optical/NIR counterparts have been identified from the DEEP2, CFHTLS, and Spitzer/Infrared Array Camera (IRAC) surveys of the same region. Using a likelihood ratio method, they find optical counterparts for 76% of their sources, complete to RAB = 24.1, and, of the 66% of the sources that have IRAC coverage, 94% have a counterpart to a limit of 0.9 uJy at 3.6 um (mAB = 23.8). After accounting for (small) positional offsets in the eight Chandra fields, the astrometric accuracy of Chandra positions is found to be 0.8 arcseconds rms; however, this number depends both on the off-axis angle and the number of detected counts for a given source. This table was created by the HEASARC in February 2009 based on the electronic versions of Tables 9, 10 and 11 from the paper which were obtained from the Astrophysical Journal web site. It is also available from the CDS at <a href="https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/180/102">https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/180/102</a>. This is a service provided by NASA HEASARC . 2009ApJS..180..102L https://heasarc.gsfc.nasa.gov/W3Browse/all/aegisx.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=aegisx& GET text/xml 180 99999 true 213.824942 51.979566 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=aegisx GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_aegisx&Action=More+Options&Action=Parameter+Search&ConeAdd=1 CHANDRA 0.0166666666666667 X-ray public aegisx AEGIS-X Chandra Extended Groth Strip X-Ray Point Source Catalog name CXO Object 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 Positional Error (arcsec) arcsec stat.error;pos double nullable fb_counts Full (0.5-7 keV) Band, Total Counts ct phot;em.X-ray short nullable fb_flux Classical Method Full-Band (0.5-10 keV) Flux erg/s/cm^2 phot.flux;em.X-ray double nullable fb_flux_pos_err Upper 1-Sigma Error in Classical Method Full-Band (0.5-10 keV) Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray double nullable fb_flux_neg_err Lower 1-Sigma Error in Classical Method Full-Band (0.5-10 keV) Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray double nullable bayes_uhb_flux_limit Limit Flag for Bayesian Method Ultra-Hard-Band (5-10 keV) Flux meta.code;phot.flux;em.X-ray.medium char nullable cfhtls_cxo_offset CFHTLS Optical and X-Ray Position Offset (arcsec) arcsec pos.angDistance;em.X-ray;em.opt double nullable deep2_likelihood Likelihood Ratio for DEEP2 Counterpart stat.likelihood double nullable detect_bands Bands in Which Source Was Detected meta.code char nullable source_id Source Identifier meta.id char nullable deep2_cxo_offset DEEP2 Optical and X-Ray Position Offset (arcsec) arcsec pos.angDistance;em.X-ray;em.opt double nullable hb_counts Hard (2-7 keV) Band, Total Counts ct phot;em.X-ray.medium short nullable bayes_uhb_flux Bayesian Method Ultra-Hard-Band (5-10 keV) Flux erg/s/cm^2 phot.flux;em.X-ray.medium double nullable bayes_hb_flux_neg_err Lower 1-Sigma Error in Bayesian Method Hard-Band (2-10 keV) Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray.medium double nullable fb_bck_counts Full (0.5-7 keV) Band, Background Counts ct phot;instr.background;em.X-ray double nullable hb_flux_pos_err Upper 1-Sigma Error in Classical Method Hard-Band (2-10 keV) Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray.medium double nullable bayes_hb_flux Bayesian Method Hard-Band (2-10 keV) Flux erg/s/cm^2 phot.flux;em.X-ray.medium double nullable irac_cxo_offset IRAC 3.6-micron and X-Ray Position Offset (arcsec) arcsec pos.angDistance;em.X-ray;em.IR double nullable bayes_sb_flux_limit Limit Flag for Bayesian Method Soft-Band (0.5-2 keV) Flux meta.code;phot.flux;em.X-ray.soft char nullable field_id Field Identifier for Individual Field in Which Source Was Detected meta.id char nullable bayes_hr_neg_err Lower 1-Sigma Error in Hardness Ratio Using Bayesian Method stat.error;phot.flux;arith.ratio;em.X-ray double nullable quality_flag Photometry Quality Flag meta.code.qual short nullable lii Galactic Longitude degree pos.galactic.lon double nullable min_detect_prob Lowest False Detection Probability Found for the Four Bands stat.probability char nullable uhb_flux_pos_err Upper 1-Sigma Error in Classical Method Ultra-Hard Band (5-10 keV) Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray.medium double nullable deep2_id DEEP2 Source Identification meta.id.cross int nullable bayes_fb_flux_pos_err Upper 1-Sigma Error in Bayesian Method Full-Band (0.5-10 keV) Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray double nullable uhb_flux Classical Method Ultra-Hard Band (5-10 keV) Flux erg/s/cm^2 phot.flux;em.X-ray.medium double nullable bayes_hb_flux_limit Limit Flag for Bayesian Method Hard-Band (2-10 keV) Flux meta.code;phot.flux;em.X-ray.medium char nullable sb_flux_limit Limit Flag for Classical Method Soft-Band (0.5-2 keV) Flux meta.code;phot.flux;em.X-ray.soft char nullable opt_ir_match_flag Flag Indicates Source Matching Details meta.code char nullable uhb_flux_limit Limit Flag for Classical Method Ultra-Hard Band (5-10 keV) Flux meta.code;phot.flux;em.X-ray.medium char nullable bayes_fb_flux_limit Limit Flag for Bayesian Method Full-Band (0.5-10 keV) Flux meta.code;phot.flux;em.X-ray char nullable bayes_sb_flux_neg_err Lower 1-Sigma Error in Bayesian Method Soft-Band (0.5-2 keV) Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray.soft double nullable cfhtls_likelihood Likelihood Ratio for CFHTLS Counterpart stat.likelihood double nullable bayes_uhb_flux_pos_err Upper 1-Sigma Error in Bayesian Method Ultra-Hard-Band (5-10 keV) Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray.medium double nullable sb_flux_neg_err Lower 1-Sigma Error in Classical Method Soft-Band (0.5-2 keV) Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray.soft double nullable bayes_uhb_flux_neg_err Lower 1-Sigma Error in Bayesian Method Ultra-Hard-Band (5-10 keV) Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray.medium double nullable uhb_flux_neg_err Lower 1-Sigma Error in Classical Method Ultra-Hard Band (5-10 keV) Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray.medium double nullable hb_bck_counts Hard (2-7 keV) Band, Background Counts ct phot;instr.background;em.X-ray.medium double nullable uhb_bck_counts Ultra-Hard (4-7 keV) Band, Background Counts ct phot;instr.background;em.X-ray.medium double nullable bayes_hr_pos_err Upper 1-Sigma Error in Hardness Ratio Using Bayesian Method stat.error;phot.flux;arith.ratio;em.X-ray double nullable bayes_sb_flux Bayesian Method Soft-Band (0.5-2 keV) Flux erg/s/cm^2 phot.flux;em.X-ray.soft double nullable imag_limit Limit Flag for i-prime Magnitude meta.code;phot.mag;em.opt.I char nullable bayes_sb_flux_pos_err Upper 1-Sigma Error in Bayesian Method Soft-Band (0.5-2 keV) Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray.soft double nullable sb_counts Soft (0.5-2 keV) Band, Total Counts ct phot;em.X-ray.soft short nullable bayes_hb_flux_pos_err Upper 1-Sigma Error in Bayesian Method Hard-Band (2-10 keV) Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray.medium double nullable imag CFHTLS i-prime Band AB Magnitude mag phot.mag;em.opt.I double nullable bii Galactic Latitude degree pos.galactic.lat double nullable sb_bck_counts Soft (0.5-2 keV) Band, Background Counts ct phot;instr.background;em.X-ray.soft double nullable hardness_ratio Hardness Ratio Using Classical Method phot.flux;arith.ratio;em.X-ray double nullable rmag DEEP2 R-Band AB Magnitude mag phot.mag;em.opt.R double nullable bayes_hr Hardness Ratio Using Bayesian Method phot.flux;arith.ratio;em.X-ray double nullable uhb_counts Ultra-Hard (4-7 keV) Band, Total Counts ct phot;em.X-ray.medium short nullable bayes_fb_flux Bayesian Method Full-Band (0.5-10 keV) Flux erg/s/cm^2 phot.flux;em.X-ray double nullable irac_id IRAC 3.6-micron Source Identification meta.id.cross char nullable off_axis Off-Axis Angle (arcmin) arcmin instr.offset double nullable cfhtls_id CFHTLS Source Identification meta.id.cross char nullable irac_3p6_um_mag IRAC 3.6-micron AB Magnitude mag phot.mag;em.IR.3-4um double nullable bayes_fb_flux_neg_err Lower 1-Sigma Error in Bayesian Method Full-Band (0.5-10 keV) Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray double nullable fb_flux_limit Limit Flag for Classical Method Full-Band (0.5-10 keV) Flux meta.code;phot.flux;em.X-ray.medium char nullable hb_flux_neg_err Lower 1-Sigma Error in Classical Method Hard-Band (2-10 keV) Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray.medium double nullable sb_flux_pos_err Upper 1-Sigma Error in Classical Method Soft-Band (0.5-2 keV) Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray.soft double nullable hb_flux Classical Method Hard-Band (2-10 keV) Flux erg/s/cm^2 phot.flux;em.X-ray.medium double nullable hb_flux_limit Limit Flag for Classical Method Hard-Band (2-10 keV) Flux meta.code;phot.flux;em.X-ray.medium char nullable sb_flux Classical Method Soft-Band (0.5-2 keV) Flux erg/s/cm^2 phot.flux;em.X-ray.soft double nullable source_flag Flag [a] Indicates Bayesian Fluxes Calculated from 70% EEF Rather Than 90% EEF meta.code char nullable irac_likelihood Likelihood Ratio for IRAC 3.6-micron Counterpart stat.likelihood double nullable irac_3p6_um_mag_limit Limit Flag for IRAC 3.6-micron Magnitude meta.code;phot.mag;em.IR.3-4um char nullable rmag_limit Limit Flag for R Magnitude meta.code;phot.mag;em.opt.R 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