NuSTAR COSMOS Field X-Ray Source Catalog

NuSTAR COSMOS Field X-Ray Source Catalog NUCOSMOSFC ivo://nasa.heasarc/nucosmosfc NASA/GSFC HEASARC Civano et al. 2026-10-02 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source To provide the census of the sources contributing to the X-ray background peak above 10 keV, the Nuclear Spectroscopic Telescope Array (NuSTAR) is performing extragalactic surveys using a three-tier "wedding cake" approach. In their paper, the authors present the NuSTAR survey of the COSMOS field, the medium sensitivity, and medium area "tier",covering 1.7 deg2 and overlapping with both Chandra and XMM-Newton data. This survey consists of 121 NuSTAR observations for a total exposure of ~3 Ms. To fully exploit these data, the authors developed a new detection strategy, carefully tested through extensive simulations. The survey sensitivity at 20% completeness is 5.9, 2.9, and 6.4 x 10-14 erg cm-2 s-1 in the 3-24, 3-8 and 8-24 keV bands, respectively. By combining detections in 3 bands, the survey consists of a sample of 91 NuSTAR sources with luminosities ~ 1042 - 1045.5 erg s-1and redshifts z ~ 0.04-2.5. Thirty-two sources are detected in the 8-24 keV band with fluxes ~100 times fainter than sources detected by Swift-BAT. Of the 91 detections, all but 4 are associated with a Chandra and/or XMM-Newton point-like counterpart. One source is associated with an extended lower energy X-ray source. The authors present the X-ray (hardness ratio and luminosity)and optical-to-X-ray properties. The observed fraction of candidate Compton-thick active galactic nuclei measured from the hardness ratio is between 13% - 20%. In their paper, the authors discuss the spectral properties of the source named NuSTAR J100259+0220.5 (source number 330) at a redshift z = 0.044, which has the highest hardness ratio in the entire sample. The measured column density exceeds 1024 cm-2, implying the source is Compton-thick. This source was not previously recognized as such without the data at energies >10 keV. This table was created by the HEASARC in August 2015 based on the the machine-readable versions of Table 5 (the COSMOS Field NuSTAR source catalog) that was obtained from the ApJ web site. This is a service provided by NASA HEASARC . 2015ApJ...808..185C https://heasarc.gsfc.nasa.gov/W3Browse/all/nucosmosfc.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=nucosmosfc& GET text/xml 180 99999 true 150.522108 1.562945 0.0333333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=nucosmosfc GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_nucosmosfc&Action=More+Options&Action=Parameter+Search&ConeAdd=1 NUSTAR 0.0333333333333333 X-ray public nucosmosfc NuSTAR COSMOS Field X-Ray Source Catalog source_number Unique Identification Number for Each Source in the Catalog meta.id;src short nullable name NuSTAR 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 bb_count_rate_limit Limit Flag for the 3-24keV-Band Count Rate meta.code;phot.count;em.X-ray char nullable bb_count_rate The 3-24keV-Band Count Rate ct/s phot.count;em.X-ray double nullable bb_flux_limit Limit Flag for Aperture-Corrected 3-24keV-Band Flux meta.code;phot.flux;em.X-ray char nullable bb_flux Aperture-Corrected 3-24keV-Band Flux erg/s/cm^2 phot.flux;em.X-ray double nullable bb_flux_error Error in Aperture-Corrected 3-24keV-Band Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray double nullable log_bb_luminosity_limit Limit Flag for Logarithm of 3-24keV-Band Luminosity meta.code;phys.luminosity;em.X-ray char nullable log_bb_luminosity Logarithm of 3-24keV-Band Luminosity log(erg/s) phys.luminosity;em.X-ray double nullable hardness_ratio Hardness Ratio phot;arith.ratio;em.X-ray double nullable sb_flux_limit Limit Flag for Aperture-Corrected 3-8keV-Band Flux meta.code;phot.flux;em.X-ray.medium char nullable sb_total_counts Total 3-8keV-Band Counts ct phot;em.X-ray.medium double nullable phot_redshift Photometric Redshift src.redshift.phot double nullable ccosmos_source_number C-COSMOS Identification Number (Elvis et al. 2009) meta.id.cross;src int nullable cxoxmm_dec X-Ray Declination degree pos.eq.dec double nullable sb_count_rate The 3-8keV-Band Count Rate ct/s phot.count;em.X-ray.medium double nullable bb_detect_likelihood The 3-24keV-Band Deblended Detection Maximum Likelihood stat.likelihood;phot.count;em.X-ray double nullable hb_nodblend_bck_counts Not Deblended Background 8-24keV-Band Counts ct phot;instr.background;em.X-ray.hard double nullable nustar_cxoxmm_offset Offset Between NuSTAR Position and Chandra or XMM Position arcsec pos.angDistance;em.X-ray double nullable bii Galactic Latitude degree pos.galactic.lat double nullable spectroscopic_type Classification Type for Spectroscopic Redshift meta.code;src.class short nullable band_ratio_neg_err Negative Error for Band Ratio stat.error;phot;arith.ratio;em.X-ray double nullable hardness_ratio_neg_err Negative Error for Hardness Ratio stat.error;phot;arith.ratio;em.X-ray double nullable photometric_type Classification Type for Photometric Redshift meta.code;src.class short nullable log_sb_luminosity_limit Limit Flag for Logarithm of 3-8keV-Band Luminosity meta.code;phys.luminosity;em.X-ray.medium char nullable bb_total_counts Total 3-24keV-Band Counts ct phot;em.X-ray double nullable lii Galactic Longitude degree pos.galactic.lon double nullable hardness_ratio_pos_err Positive Error for Hardness Ratio stat.error;phot;arith.ratio;em.X-ray double nullable cxoxmm_hb_flux The 2-10keV-Band Flux erg/s/cm^2 phot.flux;em.X-ray.medium double nullable hb_flux_error Error in Aperture-Corrected 8-24keV-Band Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray.hard double nullable cxoxmm_sb_flux_limit Limit Flag for Aperture-Corrected 0.5-2keV-Band Flux meta.code;phot.flux;em.X-ray.soft char nullable cxoxmm_ra X-Ray Right Ascension degree pos.eq.ra double nullable band_ratio_pos_err Positive Error for Band Ratio stat.error;phot;arith.ratio;em.X-ray double nullable bb_exposure The 3-24keV-Band Exposure Time s time.duration;obs.exposure;em.X-ray double nullable sb_exposure The 3-8keV-Band Exposure Time s time.duration;obs.exposure;em.X-ray.medium double nullable spec_luminosity_distance Luminosity Distance Using Spectroscopic Redshift Mpc pos.distance double nullable hb_dblend_bck_counts Deblended Background 8-24keV-Band Counts ct phot;instr.background;em.X-ray.hard double nullable phot_luminosity_distance Luminosity Distance Using Photometric Redshift Mpc pos.distance double nullable sb_flux Aperture-Corrected 3-8keV-Band Flux erg/s/cm^2 phot.flux;em.X-ray.medium double nullable sb_detect_likelihood The 3-8keV-Band Deblended Detection Maximum Likelihood stat.likelihood;phot.count;em.X-ray.medium double nullable log_hb_luminosity_limit Limit Flag for Logarithm of 8-24keV-Band Luminosity meta.code;phys.luminosity;em.X-ray.hard char nullable hb_count_rate_limit Limit Flag for the 8-24keV-Band Count Rate meta.code;phot.count;em.X-ray.hard char nullable cxoxmm_sb_flux Aperture-Corrected 0.5-2keV-Band Flux erg/s/cm^2 phot.flux;em.X-ray.soft double nullable log_hb_luminosity Logarithm of 8-24keV-Band Luminosity log(erg/s) phys.luminosity;em.X-ray.hard double nullable hb_total_counts Total 8-24keV-Band Counts ct phot;em.X-ray.hard double nullable hb_flux_limit Limit Flag for Aperture-Corrected 8-24keV-Band Flux meta.code;phot.flux;em.X-ray.hard char nullable hb_counts Net 8-24keV-Band Counts ct phot;em.X-ray.hard double nullable xcosmos_source_number XMM-COSMOS Identification Number (Brusa et al. 2010) meta.id.cross;src int nullable sb_dblend_bck_counts Deblended Background 3-8keV-Band Counts ct phot;instr.background;em.X-ray.medium double nullable hb_detect_likelihood The 8-24keV-Band Deblended Detection Maximum Likelihood stat.likelihood;phot.count;em.X-ray.hard double nullable hb_exposure The 8-24keV-Band Exposure Time s time.duration;obs.exposure;em.X-ray.hard double nullable bb_dblend_bck_counts Deblended Background 3-24keV-Band Counts ct phot;instr.background;em.X-ray double nullable mult_le_ctrpart_flag Flag [01] Indicates Multiple Low-Energy Counterparts meta.code;src short nullable sb_flux_error Error in Aperture-Corrected 3-8keV-Band Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray.medium double nullable sb_count_rate_limit Limit Flag for the 3-8keV-Band Count Rate meta.code;phot.count;em.X-ray.medium char nullable band_ratio Band Ratio phot;arith.ratio;em.X-ray double nullable log_sb_luminosity Logarithm of 3-8keV-Band Luminosity log(erg/s) phys.luminosity;em.X-ray.medium double nullable sb_counts_error Error in Net 3-8keV-Band Counts Computed Using Gehrels Statistic ct stat.error;phot;em.X-ray.medium double nullable bb_counts Net 3-24keV-Band Counts ct phot;em.X-ray double nullable sb_counts Net 3-8keV-Band Counts ct phot;em.X-ray.medium double nullable hb_flux Aperture-Corrected 8-24keV-Band Flux erg/s/cm^2 phot.flux;em.X-ray.hard double nullable bb_counts_error Error in Net 3-24keV-Band Counts Computed Using Gehrels Statistic ct stat.error;phot;em.X-ray double nullable redshift Spectroscopic Redshift src.redshift double nullable sb_nodblend_bck_counts Not Deblended Background 3-8keV-Band Counts ct phot;instr.background;em.X-ray.medium double nullable hb_count_rate The 8-24keV-Band Count Rate ct/s phot.count;em.X-ray.hard double nullable hb_counts_error Error in Net 8-24keV-Band Counts Computed Using Gehrels Statistic ct stat.error;phot;em.X-ray.hard double nullable bb_nodblend_bck_counts Not Deblended Background 3-24keV-Band Counts ct phot;instr.background;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