EFEDSMAIN ivo://nasa.heasarc/efedsmain NASA/GSFC HEASARC Brunner et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source The eROSITA X-ray telescope on board the Spectrum-Roentgen-Gamma (SRG) observatory combines a large field of view and collecting area in the energy range ~0.2 to ~8.0 keV with the capability to perform uniform scanning observations of large sky areas. SRG/eROSITA performed scanning observations of the ~140 square degrees eROSITA Final Equatorial Depth Survey (eFEDS) field as part of its performance verification phase. The observing time was chosen to slightly exceed the depth of equatorial fields after the completion of the eROSITA all-sky survey. The authors present a catalog of detected X-ray sources in the eFEDS field providing source positions and extent information, as well as fluxes in multiple energy bands and document a suite of tools and procedures developed for eROSITA data processing and analysis, validated and optimized by the eFEDS work. A multi-stage source detection procedure was optimized and calibrated by performing realistic simulations of the eROSITA eFEDS observations. The authors cross-matched the eROSITA eFEDS source catalog with previous XMM-ATLAS observations, confirming excellent agreement of the eROSITA and XMM-ATLAS source fluxes. This table presents the primary catalog of 27910 X-ray sources, including 542 with significant spatial extent, detected in the 0.2-2.3 keV energy range with detection likelihoods >=6 , corresponding to a (point source) flux limit of ~6.5 x 10<sup>-15</sup> erg/cm<sup>2</sup>/s in the 0.5-2.0 keV energy band (80% completeness). The linked <a href="/W3Browse/erosita/efedshard.html">EFEDSHARD</a> table presents the hard band sample of 246 sources detected in the energy range 2.3-5.0 keV above a detection likelihood of 10. A supplementary catalog contains 4774 low-significance source candidates with detection likelihoods between 5 and 6. The dedicated data analysis software package, calibration database, and calibrated data products are described in an appendix. Additional information for the eROSITA early data release observations is available at the <a href="https://erosita.mpe.mpg.de/edr/">eROSITA-DE EDR website</a>. This database table was originally ingested by the HEASARC in August 2022 and is based upon the "eROSITA/eFEDS main catalogue" file downloaded from the eROSITA-DE Early Data Release <a href="https://erosita.mpe.mpg.de/edr/eROSITAObservations/Catalogues/">catalogs web page</a>. It was revised in June 2024 in order to rename the right ascension, declination, and their related positional uncertainty parameters to match the parameter naming convention used in other eROSITA catalogs. In some cases, the HEASARC has altered the original field names, as per HEASARC conventions, and provides the original field names in square brackets. This is a service provided by NASA HEASARC . 2022A&A...661A...1B https://heasarc.gsfc.nasa.gov/W3Browse/all/efedsmain.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=efedsmain& GET text/xml 180 99999 true 130.61969963426 -2.90899263457466 0.0833333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=efedsmain GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_efedsmain&Action=More+Options&Action=Parameter+Search&ConeAdd=1 SRG-EROSITA 0.0833333333333333 X-ray public efedsmain eROSITA eFEDS Main X-Ray (0.2-2.3 keV) Source Catalog name Source Designation meta.id;meta.main char nullable source_number Sequential Identification Number for Each Source in the Main Catalog meta.id;src int nullable ra Corrected Right Ascension degree pos.eq.ra;meta.main double nullable dec Corrected Declination degree pos.eq.dec;meta.main double nullable source_extent Source Extent arcsec phys.angSize double nullable source_extent_error Extent Error arcsec stat.error;phys.angSize double nullable count_rate Source Count Rate ct/s phot.count;em.X-ray double nullable count_rate_error 1-Sigma Count Rate Error ct/s stat.error;phot.count;em.X-ray double nullable counts Source Net Counts, Combining 3 Bands ct phot;em.X-ray double nullable counts_error 1-Sigma Counts Error ct stat.error;phot;em.X-ray double nullable flux Source Flux erg/s/cm^2 phot.flux;em.X-ray double nullable flux_error 1-Sigma Flux Error erg/s/cm^2 stat.error;phot.flux;em.X-ray double nullable b2_aperture_radius Aperture Radius; 0.5-1 keV pixel phys.size.radius double nullable b1_flux Source Flux Converted from Count Rate; 0.2-0.5 keV erg/s/cm^2 phot.flux;em.X-ray double nullable b2_detect_likelihood Detection Likelihood Measured by Forced PSF-Fitting; 0.5-1 keV stat.likelihood double nullable b1_aperture_exposure Vignetted Exposure Value; 0.2-0.5 keV s time.duration;obs.exposure;em.X-ray double nullable b4_aperture_bkg_counts Background Counts in the Aperture, Excluding Nearby Sources; 2-4.5 keV ct phot.count;instr.background;em.X-ray double nullable hb_aperture_counts Total Counts Extracted in the Aperture; 2.3-5 keV ct phot.count;em.X-ray int nullable b4_count_rate_error 1-Sigma Count Rate Error; 2-4.5 keV ct/s stat.error;phot.count;em.X-ray double nullable hb_aperture_bkg_counts Background Counts in the Aperture, Excluding Nearby Sources; 2.3-5 keV ct phot.count;instr.background;em.X-ray double nullable b4_flux_error 1-Sigma Flux Error; 2-4.5 keV erg/s/cm^2 stat.error;phot.flux;em.X-ray double nullable b2_aperture_counts Total Counts Extracted in the Aperture; 0.5-1 keV ct phot.count;em.X-ray int nullable hb_counts_error 1-Sigma Counts Error; 2.3-5 keV ct stat.error;phot.count;em.X-ray double nullable ub_flux Source Flux Converted from Count Rate; 5-8 keV erg/s/cm^2 phot.flux;em.X-ray double nullable sb_flux_lower 1-Sigma Lower Error of Flux; 0.5-2 keV erg/s/cm^2 phot.flux;em.X-ray;stat.min double nullable b4_aperture_prob Poisson Probability of Being Background Fluctuation; 2-4.5 keV stat.probability double nullable b1_flux_lower 1-Sigma Lower Error of Flux; 0.2-0.5 keV erg/s/cm^2 phot.flux;em.X-ray;stat.min double nullable ub_flux_error 1-Sigma Flux Error; 5-8 keV erg/s/cm^2 stat.error;phot.flux;em.X-ray double nullable b4_aperture_counts Total Counts Extracted in the Aperture; 2-4.5 keV ct phot.count;em.X-ray int nullable b2_flux_upper 1-Sigma Upper Error of Flux; 0.5-1 keV erg/s/cm^2 phot.flux;em.X-ray;stat.max double nullable inarea90_flag Flag Indicates Source in the 0.2-2.3keV Exp>500s Region Which Comprises 90% Area meta.code char nullable b4_exposure Vignetted Exposure Value; 2-4.5 keV s time.duration;obs.exposure;em.X-ray double nullable bkg_counts Background Counts at the Source Position ct/arcmin^2 phot.count;instr.background;em.X-ray double nullable b2_counts_upper 1-Sigma Upper Error of Counts; 0.5-1 keV ct phot.count;em.X-ray;stat.max double nullable b1_count_rate_lower 1-Sigma Lower Error of Count Rate; 0.2-0.5 keV ct/s phot.count;em.X-ray;stat.min double nullable b2_counts_error 1-Sigma Counts Error; 0.5-1 keV ct stat.error;phot.count;em.X-ray double nullable b4_count_rate_lower 1-Sigma Lower Error of Count Rate; 2-4.5 keV ct/s phot.count;em.X-ray;stat.min double nullable b2_bkg_counts Background at the Source Position; 0.5-1 keV ct/arcmin^2 phot.count;instr.background;em.X-ray double nullable ub_bkg_counts Background at the Source Position; 5-8 keV ct/arcmin^2 phot.count;instr.background;em.X-ray double nullable b3_count_rate_error 1-Sigma Count Rate Error; 1-2 keV ct/s stat.error;phot.count;em.X-ray double nullable hb_bkg_counts Background at the Source Position; 2.3-5 keV ct/arcmin^2 phot.count;instr.background;em.X-ray double nullable b3_counts_error 1-Sigma Counts Error; 1-2 keV ct stat.error;phot.count;em.X-ray double nullable b4_counts_lower 1-Sigma Lower Error of Counts; 2-4.5 keV ct phot.count;em.X-ray;stat.min double nullable b3_aperture_prob Poisson Probability of Being Background Fluctuation; 1-2 keV stat.probability double nullable b3_aperture_counts Total Counts Extracted in the Aperture; 1-2 keV ct phot.count;em.X-ray int nullable b1_aperture_counts Total Counts Extracted in the Aperture; 0.2-0.5 keV ct phot.count;em.X-ray int nullable b2_count_rate_upper 1-Sigma Upper Error of Count Rate; 0.5-1 keV ct/s phot.count;em.X-ray;stat.max double nullable b4_flux_upper 1-Sigma Upper Error of Flux; 2-4.5 keV erg/s/cm^2 phot.flux;em.X-ray;stat.max double nullable b4_flux_lower 1-Sigma Lower Error of Flux; 2-4.5 keV erg/s/cm^2 phot.flux;em.X-ray;stat.min double nullable b3_count_rate Source Count Rate Measured by Forced PSF-Fitting; 1-2 keV ct/s phot.count;em.X-ray double nullable sb_counts_error 1-Sigma Counts Error; 0.5-2 keV ct stat.error;phot.count;em.X-ray double nullable sb_counts_upper 1-Sigma Upper Error of Counts; 0.5-2 keV ct phot.count;em.X-ray;stat.max double nullable hb_aperture_prob Poisson Probability of Being Background Fluctuation; 2.3-5 keV stat.probability double nullable b3_counts_lower 1-Sigma Lower Error of Counts; 1-2 keV ct phot.count;em.X-ray;stat.min double nullable b4_count_rate Source Count Rate Measured by Forced PSF-Fitting; 2-4.5 keV ct/s phot.count;em.X-ray double nullable b1_detect_likelihood Detection Likelihood Measured by Forced PSF-Fitting; 0.2-0.5 keV stat.likelihood double nullable b1_count_rate Source Count Rate Measured by Forced PSF-Fitting; 0.2-.5keV ct/s phot.count;em.X-ray double nullable extent_likelihood Extent Likelihood stat.likelihood double nullable b3_flux_upper 1-Sigma Upper Error of Flux; 1-2 keV erg/s/cm^2 phot.flux;em.X-ray;stat.max double nullable error_radius_raw Combined Positional Uncertainty, Uncorrected arcsec stat.error;pos double nullable hb_flux_lower 1-Sigma Lower Error of Flux; 2.3-5 keV erg/s/cm^2 phot.flux;em.X-ray;stat.min double nullable sb_detect_likelihood Detection Likelihood Measured by Forced PSF-Fitting; 0.5-2 keV stat.likelihood double nullable hb_flux_error 1-Sigma Flux Error; 2.3-5 keV erg/s/cm^2 stat.error;phot.flux;em.X-ray double nullable b3_count_rate_upper 1-Sigma Upper Error of Count Rate; 1-2 keV ct/s phot.count;em.X-ray;stat.max double nullable error_radius Combined Positional Uncertainty, Corrected arcsec stat.error;pos double nullable b1_flux_upper 1-Sigma Upper Error of Flux; 0.2-0.5 keV erg/s/cm^2 phot.flux;em.X-ray;stat.max double nullable b1_aperture_prob Poisson Probability of Being Background Fluctuation; 0.2-0.5 keV stat.probability double nullable b4_detect_likelihood Detection Likelihood Measured by Forced PSF-Fitting; 2-4.5 keV stat.likelihood double nullable b2_counts_lower 1-Sigma Lower Error of Counts; 0.5-1 keV ct phot.count;em.X-ray;stat.min double nullable ub_flux_upper 1-Sigma Upper Error of Flux; 5-8 keV erg/s/cm^2 phot.flux;em.X-ray;stat.max double nullable b1_aperture_bkg_counts Background Counts in the Aperture, Excluding Nearby Sources; 0.2-0.5 keV ct phot.count;instr.background;em.X-ray double nullable ub_aperture_bkg_counts Background Counts in the Aperture, Excluding Nearby Sources; 5-8 keV ct phot.count;instr.background;em.X-ray double nullable ub_counts_upper 1-Sigma Upper Error of Counts; 5-8 keV ct phot.count;em.X-ray;stat.max double nullable ub_aperture_prob Poisson Probability of Being Background Fluctuation; 5-8 keV stat.probability double nullable ub_count_rate Source Count Rate Measured by Forced PSF-Fitting; 5-8 keV ct/s phot.count;em.X-ray double nullable b3_aperture_exposure Vignetted Exposure Value; 1-2 keV s time.duration;obs.exposure;em.X-ray double nullable b1_aperture_radius Aperture Radius; 0.2-0.5 keV pixel phys.size.radius double nullable hb_counts_upper 1-Sigma Upper Error of Counts; 2.3-5 keV ct phot.count;em.X-ray;stat.max double nullable b4_flux Source Flux Converted from Count Rate; 2-4.5 keV erg/s/cm^2 phot.flux;em.X-ray double nullable ub_counts_lower 1-Sigma Lower Error of Counts; 5-8 keV ct phot.count;em.X-ray;stat.min double nullable sb_counts_lower 1-Sigma Lower Error of Counts; 0.5-2 keV ct phot.count;em.X-ray;stat.min double nullable b2_aperture_prob Poisson Probability of Being Background Fluctuation; 0.5-1 keV stat.probability double nullable b1_counts_upper 1-Sigma Upper Error of Counts; 0.2-0.5 keV ct phot.count;em.X-ray;stat.max double nullable hb_count_rate Source Count Rate Measured by Forced PSF-Fitting; 2.3-5 keV ct/s phot.count;em.X-ray double nullable b1_counts_lower 1-Sigma Lower Error of Counts; 0.2-0.5 keV ct phot.count;em.X-ray;stat.min double nullable sb_aperture_counts Total Counts Extracted in the Aperture; 0.5-2 keV ct phot.count;em.X-ray int nullable ub_aperture_counts Total Counts Extracted in the Aperture; 5-8 keV ct phot.count;em.X-ray int nullable sb_aperture_prob Poisson Probability of Being Background Fluctuation; 0.5-2 keV stat.probability double nullable sb_flux_upper 1-Sigma Upper Error of Flux; 0.5-2 keV erg/s/cm^2 phot.flux;em.X-ray;stat.max double nullable b4_counts Source Net Counts Measured from Count Rate; 2-4.5 keV ct phot.count;em.X-ray double nullable b2_count_rate_error 1-Sigma Count Rate Error; 0.5-1 keV ct/s stat.error;phot.count;em.X-ray double nullable b2_count_rate_lower 1-Sigma Lower Error of Count Rate; 0.5-1 keV ct/s phot.count;em.X-ray;stat.min double nullable hb_aperture_exposure Vignetted Exposure Value; 2.3-5 keV s time.duration;obs.exposure;em.X-ray double nullable sb_flux_error 1-Sigma Flux Error; 0.5-2 keV erg/s/cm^2 stat.error;phot.flux;em.X-ray double nullable sb_counts Source Net Counts Measured from Count Rate; 0.5-2 keV ct phot.count;em.X-ray double nullable sb_bkg_counts Background at the Source Position; 0.5-2 keV ct/arcmin^2 phot.count;instr.background;em.X-ray double nullable b3_aperture_radius Aperture Radius; 1-2 keV pixel phys.size.radius double nullable ub_count_rate_error 1-Sigma Count Rate Error; 5-8 keV ct/s stat.error;phot.count;em.X-ray double nullable hb_flux_upper 1-Sigma Upper Error of Flux; 2.3-5 keV erg/s/cm^2 phot.flux;em.X-ray;stat.max double nullable b1_count_rate_upper 1-Sigma Upper Error of Count Rate; ct/s phot.count;em.X-ray;stat.max double nullable ub_count_rate_upper 1-Sigma Upper Error of Count Rate; 5-8 keV ct/s phot.count;em.X-ray;stat.max double nullable ub_flux_lower 1-Sigma Lower Error of Flux; 5-8 keV erg/s/cm^2 phot.flux;em.X-ray;stat.min double nullable b2_flux_lower 1-Sigma Lower Error of Flux; 0.5-1 keV erg/s/cm^2 phot.flux;em.X-ray;stat.min double nullable b2_count_rate Source Count Rate Measured by Forced PSF-Fitting; 0.5-1 keV ct/s phot.count;em.X-ray double nullable hb_counts_lower 1-Sigma Lower Error of Counts; 2.3-5 keV ct phot.count;em.X-ray;stat.min double nullable ub_counts_error 1-Sigma Counts Error; 5-8 keV ct stat.error;phot.count;em.X-ray double nullable hb_count_rate_error 1-Sigma Count Rate Error; 2.3-5 keV ct/s stat.error;phot.count;em.X-ray double nullable b3_flux_lower 1-Sigma Lower Error of Flux; 1-2 keV erg/s/cm^2 phot.flux;em.X-ray;stat.min double nullable hb_detect_likelihood Detection Likelihood Measured by Forced PSF-Fitting; 2.3-5 keV stat.likelihood double nullable sb_exposure Vignetted Exposure Value; 0.5-2 keV s time.duration;obs.exposure;em.X-ray double nullable b1_bkg_counts Background at the Source Position; 0.2-0.5 keV ct/arcmin^2 phot.count;instr.background;em.X-ray double nullable sb_aperture_bkg_counts Background Counts in the Aperture, Excluding Nearby Sources; 0.5-2 keV ct phot.count;instr.background;em.X-ray double nullable b2_flux_error 1-Sigma Flux Error; 0.5-1 keV erg/s/cm^2 stat.error;phot.flux;em.X-ray double nullable hard_source_number Matching Source Identification Number for Each Source in the Hard Catalog meta.id;src int nullable b4_aperture_radius Aperture Radius; 2-4.5 keV pixel phys.size.radius double nullable b3_aperture_bkg_counts Background Counts in the Aperture, Excluding Nearby Sources; 1-2 keV ct phot.count;instr.background;em.X-ray double nullable b3_flux Source Flux Converted from Count Rate; 1-2 keV erg/s/cm^2 phot.flux;em.X-ray double nullable b3_detect_likelihood Detection Likelihood Measured by Forced PSF-Fitting; 1-2 keV stat.likelihood double nullable sb_count_rate_error 1-Sigma Count Rate Error; 0.5-2 keV ct/s stat.error;phot.count;em.X-ray double nullable b2_counts Source Net Counts Measured from Count Rate; 0.5-1 keV ct phot.count;em.X-ray double nullable b3_counts_upper 1-Sigma Upper Error of Counts; 1-2 keV ct phot.count;em.X-ray;stat.max double nullable lii Galactic Longitude, Uncorrected degree pos.galactic.lon double nullable sb_aperture_radius Aperture Radius; 0.5-2 keV pixel phys.size.radius double nullable exposure Vignetted Exposure Value s time.duration;obs.exposure double nullable b2_exposure Vignetted Exposure Value; 0.5-1 keV s time.duration;obs.exposure;em.X-ray double nullable b4_counts_error 1-Sigma Counts Error; 2-4.5 keV ct stat.error;phot.count;em.X-ray double nullable ub_detect_likelihood Detection Likelihood Measured by Forced PSF-Fitting; 5-8 keV stat.likelihood double nullable b4_counts_upper 1-Sigma Upper Error of Counts; 2-4.5 keV ct phot.count;em.X-ray;stat.max double nullable dec_raw Declination, Uncorrected degree pos.eq.dec double nullable sb_flux Source Flux Converted from Count Rate; 0.5-2 keV erg/s/cm^2 phot.flux;em.X-ray double nullable b3_exposure Vignetted Exposure Value; 1-2 keV s time.duration;obs.exposure;em.X-ray double nullable hb_aperture_radius Aperture Radius; 2.3-5 keV pixel phys.size.radius double nullable sb_aperture_exposure Vignetted Exposure Value; 0.5-2 keV s time.duration;obs.exposure;em.X-ray double nullable sb_count_rate Source Count Rate Measured by Forced PSF-Fitting; 0.5-2 keV ct/s phot.count;em.X-ray double nullable ra_raw Right Ascension, Uncorrected degree pos.eq.ra double nullable b3_bkg_counts Background at the Source Position; 1-2 keV ct/arcmin^2 phot.count;instr.background;em.X-ray double nullable bii Galactic Latitude, Uncorrected degree pos.galactic.lat double nullable b2_aperture_exposure Vignetted Exposure Value; 0.5-1 keV s time.duration;obs.exposure;em.X-ray double nullable b4_aperture_exposure Vignetted Exposure Value; 2-4.5 keV s time.duration;obs.exposure;em.X-ray double nullable b1_counts_error 1-Sigma Counts Error; 0.2-0.5 keV ct stat.error;phot.count;em.X-ray double nullable b2_aperture_bkg_counts Background Counts in the Aperture, Excluding Nearby Sources; 0.5-1 keV ct phot.count;instr.background;em.X-ray double nullable ub_exposure Vignetted Exposure Value; 5-8 keV s time.duration;obs.exposure;em.X-ray double nullable ub_counts Source Net Counts Measured from Count Rate; 5-8 keV ct phot.count;em.X-ray double nullable b2_flux Source Flux Converted from Count Rate; 0.5-1 keV erg/s/cm^2 phot.flux;em.X-ray double nullable hb_count_rate_lower 1-Sigma Lower Error of Count Rate; 2.3-5 keV ct/s phot.count;em.X-ray;stat.min double nullable ub_aperture_exposure Vignetted Exposure Value; 5-8 keV s time.duration;obs.exposure;em.X-ray double nullable sb_count_rate_lower 1-Sigma Lower Error of Count Rate; 0.5-2 keV ct/s phot.count;em.X-ray;stat.min double nullable sb_count_rate_upper 1-Sigma Upper Error of Count Rate; 0.5-2 keV ct/s phot.count;em.X-ray;stat.max double nullable b1_flux_error 1-Sigma Flux Error; 0.2-0.5 keV erg/s/cm^2 stat.error;phot.flux;em.X-ray double nullable hb_count_rate_upper 1-Sigma Upper Error of Count Rate; 2.3-5 keV ct/s phot.count;em.X-ray;stat.max double nullable detect_likelihood Detection Likelihood Measured by PSF-Fitting stat.likelihood double nullable hb_exposure Vignetted Exposure Value; 2.3-5 keV s time.duration;obs.exposure;em.X-ray double nullable ub_count_rate_lower 1-Sigma Lower Error of Count Rate; 5-8 keV ct/s phot.count;em.X-ray;stat.min double nullable b4_count_rate_upper 1-Sigma Upper Error of Count Rate; 2-4.5 keV ct/s phot.count;em.X-ray;stat.max double nullable hb_counts Source Net Counts Measured from Count Rate; 2.3-5 keV ct phot.count;em.X-ray double nullable b4_bkg_counts Background at the Source Position; 2-4.5 keV ct/arcmin^2 phot.count;instr.background;em.X-ray double nullable hb_flux Source Flux Converted from Count Rate; 2.3-5 keV erg/s/cm^2 phot.flux;em.X-ray double nullable ub_aperture_radius Aperture Radius; 5-8 keV pixel phys.size.radius double nullable b3_flux_error 1-Sigma Flux Error; 1-2 keV erg/s/cm^2 stat.error;phot.flux;em.X-ray double nullable b1_counts Source Net Counts Measured from Count Rate; 0.2-0.5 keV ct phot.count;em.X-ray double nullable b3_count_rate_lower 1-Sigma Lower Error of Count Rate; 1-2 keV ct/s phot.count;em.X-ray;stat.min double nullable b1_count_rate_error 1-Sigma Count Rate Error; 0.2-0.5 keV ct/s stat.error;phot.count;em.X-ray double nullable b1_exposure Vignetted Exposure Value; 0.2-0.5 keV s time.duration;obs.exposure;em.X-ray double nullable b3_counts Source Net Counts Measured from Count Rate; 1-2 keV ct phot.count;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