XMM-Newton Survey Catalog in the Herschel-ATLAS Field

XMM-Newton Survey Catalog in the Herschel-ATLAS Field XMMATLAS ivo://nasa.heasarc/xmmatlas NASA/GSFC HEASARC Ranalli et al. 2026-05-22 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source Wide area X-ray and far-infrared surveys are a fundamental tool to investigate the link between AGN growth and star formation, especially in the low-redshift universe (z < 1). The Herschel-Astrophysical Terahertz Large Area Survey (H-ATLAS) has covered 550 deg2 in five far-infrared and sub-mm bands, 16 deg2 of which have been presented in the Science Demonstration Phase (SDP) catalogue. The reference paper cited below introduces the XMM-Newton observations in the H-ATLAS SDP area, covering 7.1 deg2 with flux limits of 2 x 10-15, 6 x 10-15, and 9 x 10-15 erg/s/cm2 in the 0.5-2, 0.5-8 and 2-8keV bands, respectively. The paper presents the source detection techniques and the "main" catalog, which includes 1700, 1582 and 814 sources detected by EMLDetect in the 0.5-8, 0.5-2 and 2-8keV bands, respectively; the number of unique sources is 1816. The authors extract spectra and derive fluxes from power-law fits for 398 sources with more than 40 counts in the 0.5-8 keV band. They compare the best-fit fluxes with those in the catalog, which were obtained assuming a common photon index Gamma of 1.7; the authors find no bulk difference between the fluxes, and a moderate dispersion s of 0.33 dex. Using wherever possible the fluxes from the spectral fits, the authors derive the 2-10 keV Log N-Log S distribution, which is consistent with a Euclidean distribution. Finally, they release the computer code for the tools which they developed for this project. Sources were detected with a two-stage process. With the first pass at low significance, the authors got a list of candidate detections; and on the second pass they raised the significance threshold and derived accurate source parameters. Between the two passes, and because the second pass needs an input catalog, they identified the sources detected in more than one band. In the first pass, the SAS wavelet detection program ewavelet was run separately on each of the 0.5-2, 2-8 and 0.5-8 keV images of the entire mosaic, with a significance threshold of 4 sigma and the default wavelet scales (minimum 2 pixels, maximum 8 pixels, with a pixel size of 4). All parameters in this catalog which were derived from ewavelet have been given a prefix of 'wav' in this HEASARC representation so as to distinguish them from the parameters derived using EMLDetect. In the second pass, the authors used the SAS EMLDetect program to validate the detections, refine the coordinates and obtain maximum-likelihood estimates of the source counts, count rates and fluxes. The EMLDetect minimum likelihood was set at L = 4.6, as in Ranalli et al. (2013, A&A, 555, A42), which corresponds to a false-detection probability of 1.01 x 10-2. Together with the 4-sigma threshold for ewavelet, for the final catalog this yields a joint significance between 4 sigma and 5 sigma, but which cannot be further constrained without simulations. This table contains the X-ray sources which were detected in the 7.1 deg2 XMM-Newton observations of the H-ATLAS field. The 1816 sources which were detected by both programs were presented in the main table in the reference paper (and are included in this HEASARC table where they are indicated by a value of the source_sample parameter of 'main'), while the 234 sources which were only detected by ewavelet were presented in the supplementary table in the reference paper (and are included in this HEASARC table where they are indicated by a value of the source_sample parameter of 'supp'). The same parameters were present in both the main and supplementary tables in the reference paper, but those parameters which came from EMLDetect are empty for the sources in the supplementary table. The parameters obtained using ewavelet (those parameters with the 'wav' prefix in their names) containing the source properties (counts, count rates, fluxes, exposure times, background, wavelet detection scale and source extent), while reported in this table for all sources, are actually only interesting for supplementary sources, according to the authors. This table was created by the HEASARC in May 2015 based on the union of <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/A+A/577/A121">CDS Catalog J/A+A/577/A121</a> files main.dat (which contain 1816 sources detected by both detection algorithms) and suppl.dat (which contains 234 'supplementary' sources detected only by the wavelet detection algorithm ewavelet). It thus contains a total of 2050 sources. This is a service provided by NASA HEASARC . 2015A&A...577A.121R https://heasarc.gsfc.nasa.gov/W3Browse/all/xmmatlas.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=xmmatlas& GET text/xml 180 99999 true 135.92204 -1.27775 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=xmmatlas GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_xmmatlas&Action=More+Options&Action=Parameter+Search&ConeAdd=1 XMM-NEWTON 0.0166666666666667 X-ray public xmmatlas XMM-Newton Survey Catalog in the Herschel-ATLAS Field source_number Sequential Identification Number for Each Source in Catalog meta.id;src int nullable name Catalog Object Designation (XMMATLAS JHHMMSS.s+DDMMSS.s) 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 Error in Position (1-Sigma) arcsec stat.error;pos double nullable fb_counts Sum of the Net Source Counts from MOS1+MOS2+PN in the 0.5-8keV Band phot;em.X-ray double nullable fb_counts_error Error in FB Counts (1-Sigma) (scts_err058) stat.error;phot;em.X-ray double nullable fb_flux Flux in the 0.5-8keV Band, Averaged over the Three Cameras erg/s/cm^2 phot.flux;em.X-ray double nullable fb_flux_error Error in Flux058 (1-Sigma) erg/s/cm^2 stat.error;phot.flux;em.X-ray double nullable hardness_ratio Hardness Ratio phot.flux;arith.ratio;em.X-ray double nullable hardness_ratio_error Error in Hardness Ratio (1-Sigma) stat.error;phot.flux;arith.ratio;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 wav_fb_exposure Exposure Times from ewavelet in the 0.5-8keV Band, Summed over the Three Cameras s time.duration;obs.exposure;em.X-ray double nullable sb_source_number Source Number from 0.5-2keV Detection meta.id;src int nullable fb_dec Declination from emldetect, 0.5-8 keV degree pos.eq.dec double nullable wav_sb_extent_error Error in SB Source Extent (1-Sigma) pixel stat.error;phys.angSize;em.X-ray.soft double nullable sb_count_rate Net Count Rates in the 0.5-2keV Band, Averaged over the Three Cameras ct/s phot.count;em.X-ray.soft double nullable fb_source_number Source Number from 0.5-8keV Detection meta.id;src short nullable wav_fb_sb_assoc_reliab Association Reliability Between the 0.5-8keV and 0.5-2keV Coordinates stat.probability double nullable wav_hb_count_rate Net Count Rates from ewavelet in the 2-8keV Band ct/s phot.count;em.X-ray.medium double nullable fb_extent_error Error in ext058 (1-Sigma) pixel stat.error;phys.angSize;em.X-ray double nullable sb_counts_error Error in SB Counts (1-Sigma) (scts_err052) stat.error;phot;em.X-ray.soft double nullable wav_dec Declination from ewavelet degree pos.eq.dec double nullable wav_fb_extent_error Error in FB Source Extent (1-Sigma) pixel stat.error;phys.angSize;em.X-ray double nullable wav_sb_detect_scale Wavelet Detection Scale in the 0.5-2keV Band (1 pixel=4 arcsec) pixel instr.scale double nullable wav_fb_dec Declination from ewavelet, 0.5-8 keV degree pos.eq.dec double nullable wav_hb_flux Flux from ewavelet in the 2-8keV Band, Averaged over the Three Cameras erg/s/cm^2 phot.flux;em.X-ray.medium double nullable sb_detect_likelihood Detection Likelihood in the 0.5-2keV Band stat.likelihood;phot.count;em.X-ray.soft double nullable wav_hb_flux_error Error in HB Flux (1-Sigma) erg/s/cm^2 stat.error;phot.flux;em.X-ray.medium double nullable sb_extent_likelihood Likelihood of Extent in the 0.5-2keV Band stat.likelihood;phys.angSize;em.X-ray.soft double nullable sb_dec Declination from emldetect, 0.5-2 keV degree pos.eq.dec double nullable hb_dec Declination from emldetect, 2-8 keV degree pos.eq.dec double nullable sb_bck_sb Background Surface Brightness in the 0.5-2keV Band arcsec^-2 phot;em.X-ray.soft double nullable hb_flux_error Error in Flux28 (1-Sigma) erg/s/cm^2 stat.error;phot.flux;em.X-ray.medium double nullable fb_extent Source Extent in the 0.5-8keV Band pixel phys.angSize;em.X-ray double nullable fb_bck_sb Background Surface Brightness in the 0.5-8keV Band arcsec^-2 phot;em.X-ray double nullable sb_exposure Exposure times in the 0.5-2keV Band, Summed over the Three Cameras s time.duration;obs.exposure;em.X-ray.soft double nullable hb_counts_error Error in HB Counts (1-Sigma) (scts_err28) stat.error;phot;em.X-ray.medium double nullable wav_hb_dec Declination from ewavelet, 2-8 keV degree pos.eq.dec double nullable source_sample Field Indicates Published Table/Sample from Which the Entry Originates meta.ref;meta.table char nullable fb_count_rate Net Count Rates in the 0.5-8keV Band, Averaged over the Three Cameras ct/s phot.count;em.X-ray double nullable sb_extent Source Extent in the 0.5-2keV Band pixel phys.angSize;em.X-ray.soft double nullable wav_fb_counts Net Source Counts from ewavelet in the 0.5-8keV Band phot;em.X-ray double nullable wav_fb_detect_scale Wavelet Detection Scale in the 0.5-8keV Band (1 pixel=4 arcsec) pixel instr.scale double nullable sb_extent_error Error in ext052 (1-Sigma) pixel stat.error;phys.angSize;em.X-ray.soft double nullable hb_source_number Source Number from 2-8keV Detection meta.id;src int nullable wav_sb_counts Net Source Counts from ewavelet in the 0.5-2keV Band phot;em.X-ray.soft double nullable wav_sb_counts_error Error in SB Counts (1-Sigma) stat.error;phot;em.X-ray.soft double nullable wav_sb_ra Right Ascension from ewavelet, 0.5-2 keV degree pos.eq.ra double nullable hb_bck_sb Background Surface Brightness in the 2-8keV Band arcsec^-2 phot;em.X-ray.medium double nullable wav_sb_flux Flux from ewavelet in the 0.5-2keV Band, Averaged over the Three Cameras erg/s/cm^2 phot.flux;em.X-ray.soft double nullable hb_detect_likelihood Detection Likelihood in the 2-8keV Band stat.likelihood;phot.count;em.X-ray.medium double nullable sb_counts Sum of the Net Source Counts from MOS1+MOS2+PN in the 0.5-2keV Band phot;em.X-ray.soft double nullable fb_detect_likelihood Detection Likelihood in the 0.5-8keV Band stat.likelihood;phot.count;em.X-ray double nullable wav_fb_flux Flux from ewavelet in the 0.5-8keV Band, Averaged over the Three Cameras erg/s/cm^2 phot.flux;em.X-ray double nullable wav_fb_bck_sb Background Surface Brightness from ewavelet in the 0.5-8keV Band arcsec^-2 phot;em.X-ray double nullable wav_fb_hb_assoc_reliab Association Reliability Between the 0.5-8keV and 2-8keV Coordinates stat.probability double nullable wav_hb_ra Right Ascension from ewavelet, 2-8 keV degree pos.eq.ra double nullable bii Galactic Latitude degree pos.galactic.lat double nullable wav_hb_exposure Exposure Times from ewavelet in the 2-8keV Band, Summed over the Three Cameras s time.duration;obs.exposure;em.X-ray.medium double nullable wav_hb_extent_error Error in HB Source Extent (1-Sigma) pixel stat.error;phys.angSize;em.X-ray.medium double nullable sb_ra Right Ascension from emldetect, 0.5-2 keV degree pos.eq.ra double nullable lii Galactic Longitude degree pos.galactic.lon double nullable wav_ra Right Ascension from ewavelet degree pos.eq.ra double nullable wav_hb_detect_scale Wavelet Detection Scale in the 2-8keV Band (1pi=4") pixel instr.scale double nullable wav_hb_extent Source Extent from ewavelet in the 0.5-8keVn Band (1 pixel=4 arcsec) pixel phys.angSize;em.X-ray.medium double nullable wav_hb_bck_sb Background Surface Brightness from ewavelet in the 2-8keV Band arcsec^-2 phot;em.X-ray.medium double nullable hb_flux Flux in the 2-8keV Band, Averaged over the Three Cameras erg/s/cm^2 phot.flux;em.X-ray.medium double nullable wav_sb_count_rate Net Count Rates from ewavelet in the 0.5-2keV Band ct/s phot.count;em.X-ray.soft double nullable sb_flux_error Error in Flux052 (1-Sigma) erg/s/cm^2 stat.error;phot.flux;em.X-ray.soft double nullable sb_flux Flux in the 0.5-2keV Band, Averaged over the Three Cameras erg/s/cm^2 phot.flux;em.X-ray.soft double nullable wav_fb_count_rate Net Count Rates from ewavelet in the 0.5-8keV Band ct/s phot.count;em.X-ray double nullable wav_sb_extent Source Extent from ewavelet in the 0.5-8keV Band (1 pixel=4 arcsec) pixel phys.angSize;em.X-ray.soft double nullable wav_fb_counts_error Error in FB Counts (1-Sigma) stat.error;phot;em.X-ray double nullable wav_fb_extent Source Extent from ewavelet in the 0.5-8keV Band (1 pixel=4 arcsec) pixel phys.angSize;em.X-ray double nullable fb_ra Right Ascension from emldetect, 0.5-8 keV degree pos.eq.ra double nullable wav_hb_counts Net Source Counts from ewavelet in the 2-8keV Band phot;em.X-ray.medium double nullable hb_counts Sum of the Net Source Counts from MOS1+MOS2+PN in the 2-8keV Band phot;em.X-ray.medium double nullable wav_sb_exposure Exposure Times from ewavelet in the 0.5-2keV Band, Summed over the Three Cameras s time.duration;obs.exposure;em.X-ray.soft double nullable fb_exposure Exposure times in the 0.5-8keV Band, Summed over the Three Cameras s time.duration;obs.exposure;em.X-ray double nullable hb_exposure Exposure times in the 2-8keV Band, Summed over the Three Cameras s time.duration;obs.exposure;em.X-ray.medium double nullable fb_extent_likelihood Likelihood of Extent in the 0.5-8keV Band stat.likelihood;phys.angSize;em.X-ray double nullable wav_sb_bck_sb Background Surface Brightness from ewavelet in the 0.5-2keV Band arcsec^-2 phot;em.X-ray.soft double nullable hb_count_rate Net Count Rates in the 2-8keV Band, Averaged over the Three Cameras ct/s phot.count;em.X-ray.medium double nullable wav_hb_counts_error Error in HB Counts (1-Sigma) stat.error;phot;em.X-ray.medium double nullable wav_fb_ra Right Ascension from ewavelet, 0.5-8 keV degree pos.eq.ra double nullable wav_error_radius Error in Position from ewavelet (1-Sigma) arcsec stat.error;pos double nullable wav_sb_flux_error Error in SB Flux (1-Sigma) erg/s/cm^2 stat.error;phot.flux;em.X-ray.soft double nullable wav_fb_flux_error Error in FB Flux (1-Sigma) erg/s/cm^2 stat.error;phot.flux;em.X-ray double nullable wav_sb_dec Declination from ewavelet, 0.5-2 keV degree pos.eq.dec double nullable hb_ra Right Ascension from emldetect, 2-8 keV degree pos.eq.ra double nullable