M 33 Deep XMM-Newton Survey X-Ray Source Catalog

M 33 Deep XMM-Newton Survey X-Ray Source Catalog M33DEEPXMM ivo://nasa.heasarc/m33deepxmm NASA/GSFC HEASARC Williams et al. 2026-10-02 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source The authors have obtained a deep 8-field XMM-Newton mosaic of M33 covering the galaxy out to the D25 isophote and beyond to a limiting 0.2-4.5 keV unabsorbed flux of 5 x 10-16 erg cm-2 s-1 (L > 4 x 1034 erg s-1 at the 817 kpc distance of M33). These data allow complete coverage of the galaxy with high sensitivity to soft sources such as diffuse hot gas and supernova remnants (SNRs). In the reference paper, the authors describe the methods they used to identify and characterize 1296 point sources in the 8 fields. They compare their resulting source catalog to the literature, note variable sources, construct hardness ratios, classify soft sources, analyze the source density profile, and measure the X-ray luminosity function (XLF). As a result of the large effective area of XMM-Newton below 1 keV, the survey contains many new soft X-ray sources. The radial source density profile and XLF for the sources suggest that only ~15% of the 391 bright sources with L > 3.6 x 1035 erg s-1 are likely to be associated with M33, and more than a third of these are known SNRs. The log(N)-log(S) distribution, when corrected for background contamination, is a relatively flat power law with a differential index of 1.5, which suggests that many of the other M33 sources may be high-mass X-ray binaries. Finally, the authors note the discovery of an interesting new transient X-ray source, which they are unable to classify. The list of XMM-Newton observations used for this survey is given in Table 1 of the reference paper. The data reduction and source detection techniques are described in Section 3 of this same reference. The unabsorbed energy conversion factors (ECF) values for different energy bands and instruments that were used in this paper are as follows (the units are 1011 counts cm2 erg-1): <pre> HEASARC Energy Band MOS1 MOS2 PN band prefix (keV) Med Filter Med Filter Thin Filter sb0_ 0.2-0.5 0.5009 0.4974 2.7709 sb1_ 0.5-1.0 1.2736 1.2808 6.006 mb_ 1.0-2.0 1.8664 1.8681 5.4819 hb_ 2.0-4.5 0.7266 0.7307 1.9276 fb_ 0.2-4.5 </pre> This table was created by the HEASARC in July 2015 based on an electronic version of Table 3 of the reference paper, the list of XMM-Newton X-ray point sources detected in a deep 8-field mosaic of M33, which was obtained from the ApJS web site. This is a service provided by NASA HEASARC . 2015ApJS..218....9W https://heasarc.gsfc.nasa.gov/W3Browse/all/m33deepxmm.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=m33deepxmm& GET text/xml 180 99999 true 23.28466667 30.08276944 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=m33deepxmm GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_m33deepxmm&Action=More+Options&Action=Parameter+Search&ConeAdd=1 XMM-NEWTON 0.0166666666666667 X-ray public m33deepxmm M 33 Deep XMM-Newton Survey X-Ray Source Catalog name 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 error_radius Uncertainty in Position arcsec stat.error;pos double nullable fb_count_rate Total 0.2-4.5 keV Source Rate ct/s phot.count;em.X-ray double nullable fb_count_rate_error Error in Rate ct/s phot.count;em.X-ray double nullable fb_flux Total 0.2-4.5 keV Source Flux erg/s/cm^2 phot.flux;em.X-ray double nullable fb_flux_error Error in Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray double nullable source_flags Flags Indicate Note(s) Concerning Source meta.code;src char nullable hardness_ratio_1 Hardness Ratio 1 phot.flux;arith.ratio;em.X-ray double nullable hardness_ratio_2 Hardness Ratio 2 phot.flux;arith.ratio;em.X-ray double nullable m2_mb_count_rate MOS2 1.0-2.0 keV Rate ct/s phot.count;em.X-ray.soft double nullable hb_count_rate_error Error in Rate-e3 ct/s stat.error;phot.count;em.X-ray.medium double nullable pn_sb0_count_rate EPN 0.2-0.5 keV Rate ct/s phot.count;em.X-ray.soft double nullable m2_hb_counts_error Error in Counts-MOS2e3 ct stat.error;phot;em.X-ray.medium double nullable pn_sb1_flux EPN 0.5-1.0 keV Flux erg/s/cm^2 phot.flux;em.X-ray.soft double nullable m2_mb_counts_error Error in Counts-MOS2e2 ct stat.error;phot;em.X-ray.soft double nullable m2_hb_counts MOS2 2.0-4.5 keV Source Counts ct phot;em.X-ray.medium double nullable pn_sb1_counts EPN 0.5-1.0 keV Source Counts ct phot;em.X-ray.soft double nullable m2_mb_exposure MOS2 1.0-2.0 keV Exposure Time s time.duration;obs.exposure;em.X-ray.soft double nullable m2_sb1_flux_error Error in Flux-MOS2e1 erg/s/cm^2 stat.error;phot.flux;em.X-ray.soft double nullable sb1_count_rate_error Error in Rate-e1 ct/s stat.error;phot.count;em.X-ray.soft double nullable m1_mb_count_rate MOS1 1.0-2.0 keV Rate ct/s phot.count;em.X-ray.soft double nullable source_type Object Type src.class char nullable pn_sb1_counts_error Error in Counts-EPNe1 ct stat.error;phot;em.X-ray.soft double nullable pn_mb_exposure EPN 1.0-2.0 keV Exposure Time s time.duration;obs.exposure;em.X-ray.soft double nullable mb_counts The 1.0-2.0 keV Source Counts ct phot;em.X-ray.soft double nullable mb_flux The 1.0-2.0 keV Flux erg/s/cm^2 phot.flux;em.X-ray.soft double nullable m1_mb_count_rate_error Error in Rate-MOS1e2 ct/s stat.error;phot.count;em.X-ray.soft double nullable m2_sb1_counts_error Error in Counts-MOS2e1 ct stat.error;phot;em.X-ray.soft double nullable sb0_count_rate_error Error in Rate-e0 ct/s stat.error;phot.count;em.X-ray.soft double nullable pn_sb0_count_rate_error Error in Rate-EPNe0 ct/s stat.error;phot.count;em.X-ray.soft double nullable pn_sb1_exposure EPN 0.5-1.0 keV Exposure Time s time.duration;obs.exposure;em.X-ray.soft double nullable pn_mb_flux_error Error in Flux-EPNe2 erg/s/cm^2 stat.error;phot.flux;em.X-ray.soft double nullable m2_hb_exposure MOS2 2.0-4.5 keV Exposure Time s time.duration;obs.exposure;em.X-ray.medium double nullable bii Galactic Latitude degree pos.galactic.lat double nullable pn_sb1_flux_error Error in Flux-EPNe1 erg/s/cm^2 stat.error;phot.flux;em.X-ray.soft double nullable m1_hb_exposure MOS1 2.0-4.5 keV Exposure Time s time.duration;obs.exposure;em.X-ray.medium double nullable m2_mb_counts MOS2 1.0-2.0 keV Source Counts ct phot;em.X-ray.soft double nullable pn_mb_count_rate_error Error in Rate-EPNe2 ct/s stat.error;phot.count;em.X-ray.soft double nullable pn_sb0_counts EPN 0.2-0.5 keV Source Counts ct phot;em.X-ray.soft double nullable hb_counts_error Error in Counts-e3 ct stat.error;phot;em.X-ray.medium double nullable m2_sb1_count_rate_error Error in Rate-MOS2e1 ct/s stat.error;phot.count;em.X-ray.soft double nullable sb0_counts The 0.2-0.5 keV Source Counts ct phot;em.X-ray.soft double nullable m2_sb1_flux MOS2 0.5-1.0 keV Flux erg/s/cm^2 phot.flux;em.X-ray.soft double nullable mb_flux_error Error in Flux-e2 erg/s/cm^2 stat.error;phot.flux;em.X-ray.soft double nullable m1_hb_count_rate_error Error in Rate-MOS1e3 ct/s stat.error;phot.count;em.X-ray.medium double nullable m2_sb0_counts MOS2 0.2-0.5 keV Source Counts ct phot;em.X-ray.soft double nullable pn_mb_count_rate EPN 1.0-2.0 keV Rate ct/s phot.count;em.X-ray.soft double nullable m1_hb_flux_error Error in Flux-MOS1e3 erg/s/cm^2 stat.error;phot.flux;em.X-ray.medium double nullable sb1_flux The 0.5-1.0 keV Flux erg/s/cm^2 phot.flux;em.X-ray.soft double nullable m2_sb1_count_rate MOS2 0.5-1.0 keV Rate ct/s phot.count;em.X-ray.soft double nullable m1_sb0_detect_likelihood MOS1 0.2-0.5 keV Detection Likelihood stat.likelihood;em.X-ray.soft double nullable m2_sb1_exposure MOS2 0.5-1.0 keV Exposure Time s time.duration;obs.exposure;em.X-ray.soft double nullable mb_detect_likelihood The 1.0-2.0 keV Detection Likelihood stat.likelihood;em.X-ray.soft double nullable hardness_ratio_2c Hardness Ratio 2C phot.flux;arith.ratio;em.X-ray.soft double nullable hb_detect_likelihood The 2.0-4.5 keV Detection Likelihood stat.likelihood;em.X-ray.medium double nullable sb0_counts_error Error in Counts-e0 ct stat.error;phot;em.X-ray.soft double nullable m2_sb0_exposure MOS2 0.2-0.5 keV Exposure Time s time.duration;obs.exposure;em.X-ray.soft double nullable m1_mb_exposure MOS1 1.0-2.0 keV Exposure Time s time.duration;obs.exposure;em.X-ray.soft double nullable m2_sb0_counts_error Error in Counts-MOS2e0 ct stat.error;phot;em.X-ray.soft double nullable pn_sb0_exposure EPN 0.2-0.5 keV Exposure Time s time.duration;obs.exposure;em.X-ray.soft double nullable mb_count_rate The 1.0-2.0 keV Rate ct/s phot.count;em.X-ray.soft double nullable m1_mb_counts_error Error in Counts-MOS1e2 ct stat.error;phot;em.X-ray.soft double nullable source_number Sequential Identification Number for Each Source in Catalog meta.id;src short nullable pn_hb_flux_error Error in Flux-EPNe3 erg/s/cm^2 stat.error;phot.flux;em.X-ray.medium double nullable m1_sb0_counts_error Error in Counts-MOS1e0 ct stat.error;phot;em.X-ray.soft double nullable sb1_flux_error Error in Flux-e1 erg/s/cm^2 stat.error;phot.flux;em.X-ray.soft double nullable m2_hb_count_rate_error Error in Rate-MOS2e3 ct/s stat.error;phot.count;em.X-ray.medium double nullable pn_hb_flux EPN 2.0-4.5 keV Flux erg/s/cm^2 phot.flux;em.X-ray.medium double nullable m1_sb1_flux MOS1 0.5-1.0 keV Flux erg/s/cm^2 phot.flux;em.X-ray.soft double nullable pn_hb_count_rate_error Error in Rate-EPNe3 ct/s stat.error;phot.count;em.X-ray.medium double nullable pn_hb_counts_error Error in Counts-EPNe3 ct stat.error;phot;em.X-ray.medium double nullable m2_mb_detect_likelihood MOS2 1.0-2.0 keV Detection Likelihood stat.likelihood;em.X-ray.soft double nullable m1_sb0_count_rate_error Error in Rate-MOS1e0 ct/s stat.error;phot.count;em.X-ray.soft double nullable m1_hb_flux MOS1 2.0-4.5 keV Flux erg/s/cm^2 phot.flux;em.X-ray.medium double nullable m2_mb_count_rate_error Error in Rate-MOS2e2 ct/s stat.error;phot.count;em.X-ray.soft double nullable m1_mb_counts MOS1 1.0-2.0 keV Source Counts ct phot;em.X-ray.soft double nullable pn_sb1_count_rate EPN 0.5-1.0 keV Rate ct/s phot.count;em.X-ray.soft double nullable m2_hb_flux MOS2 2.0-4.5 keV Flux erg/s/cm^2 phot.flux;em.X-ray.medium double nullable m1_mb_detect_likelihood MOS1 1.0-2.0 keV Detection Likelihood stat.likelihood;em.X-ray.soft double nullable sb1_counts_error Error in Counts-e1 ct stat.error;phot;em.X-ray.soft double nullable m2_sb0_count_rate MOS2 0.2-0.5 keV Rate ct/s phot.count;em.X-ray.soft double nullable m2_sb0_flux_error Error in Flux-MOS2e0 erg/s/cm^2 stat.error;phot.flux;em.X-ray.soft double nullable alt_name Secondary Identification meta.id.cross char nullable sb0_count_rate The 0.2-0.5 keV Rate ct/s phot.count;em.X-ray.soft double nullable fb_counts Total 0.2-4.5 keV Source Counts ct phot;em.X-ray double nullable hb_count_rate The 2.0-4.5 keV Rate ct/s phot.count;em.X-ray.medium double nullable m1_sb1_counts MOS1 0.5-1.0 keV Source Counts ct phot;em.X-ray.soft double nullable sb0_flux The 0.2-0.5 keV Flux erg/s/cm^2 phot.flux;em.X-ray.soft double nullable m1_hb_counts MOS1 2.0-4.5 keV Source Counts ct phot;em.X-ray.medium double nullable hb_counts The 2.0-4.5 keV Source Counts ct phot;em.X-ray.medium double nullable m1_sb1_detect_likelihood MOS1 0.5-1.0 keV Detection Likelihood stat.likelihood;em.X-ray.soft double nullable sb1_detect_likelihood The 0.5-1.0 keV Detection Likelihood stat.likelihood;em.X-ray.soft double nullable sb0_detect_likelihood The 0.2-0.5 keV Detection Likelihood stat.likelihood;em.X-ray.soft double nullable m2_hb_flux_error Error in Flux-MOS2e3 erg/s/cm^2 stat.error;phot.flux;em.X-ray.medium double nullable m1_mb_flux_error Error in Flux-MOS1e2 erg/s/cm^2 stat.error;phot.flux;em.X-ray.soft double nullable m2_sb0_detect_likelihood MOS2 0.2-0.5 keV Detection Likelihood stat.likelihood;em.X-ray.soft double nullable hb_flux_error Error in Flux-e3 erg/s/cm^2 stat.error;phot.flux;em.X-ray.medium double nullable m1_sb0_count_rate MOS1 0.2-0.5 keV Rate ct/s phot.count;em.X-ray.soft double nullable sb1_counts The 0.5-1.0 keV Source Counts ct phot;em.X-ray.soft double nullable pn_sb1_count_rate_error Error in Rate-EPNe1 ct/s stat.error;phot.count;em.X-ray.soft double nullable m1_sb1_count_rate MOS1 0.5-1.0 keV Rate ct/s phot.count;em.X-ray.soft double nullable mb_counts_error Error in Counts-e2 ct stat.error;phot;em.X-ray.soft double nullable m1_hb_count_rate MOS1 2.0-4.5 keV Rate ct/s phot.count;em.X-ray.medium double nullable hb_flux The 2.0-4.5 keV Flux erg/s/cm^2 phot.flux;em.X-ray.medium double nullable pn_hb_counts EPN 2.0-4.5 keV Source Counts ct phot;em.X-ray.medium double nullable m1_sb0_flux MOS1 0.2-0.5 keV Flux erg/s/cm^2 phot.flux;em.X-ray.soft double nullable pn_hb_detect_likelihood EPN 2.0-4.5 keV Detection Likelihood stat.likelihood;em.X-ray.medium double nullable m1_sb1_flux_error Error in Flux-MOS1e1 erg/s/cm^2 stat.error;phot.flux;em.X-ray.soft double nullable sb0_flux_error Error in Flux-e0 erg/s/cm^2 stat.error;phot.flux;em.X-ray.soft double nullable m2_sb1_detect_likelihood MOS2 0.5-1.0 keV Detection Likelihood stat.likelihood;em.X-ray.soft double nullable m1_hb_counts_error Error in Counts-MOS1e3 ct stat.error;phot;em.X-ray.medium double nullable m1_sb1_exposure MOS1 0.5-1.0 keV Exposure Time s time.duration;obs.exposure;em.X-ray.soft double nullable pn_mb_flux EPN 1.0-2.0 keV Flux erg/s/cm^2 phot.flux;em.X-ray.soft double nullable m2_hb_detect_likelihood MOS2 2.0-4.5 keV Detection Likelihood stat.likelihood;em.X-ray.medium double nullable m1_sb0_exposure MOS1 0.2-0.5 keV Exposure Time s time.duration;obs.exposure;em.X-ray.soft double nullable fb_detect_likelihood Total 0.2-4.5 keV Detection Likelihood stat.likelihood;em.X-ray double nullable m1_mb_flux MOS1 1.0-2.0 keV Flux erg/s/cm^2 phot.flux;em.X-ray.soft double nullable pn_sb0_counts_error Error in Counts-EPNe0 ct stat.error;phot;em.X-ray.soft double nullable m1_sb1_count_rate_error Error in Rate-MOS1e1 ct/s stat.error;phot.count;em.X-ray.soft double nullable fb_counts_error Error in Counts ct stat.error;phot;em.X-ray double nullable lii Galactic Longitude degree pos.galactic.lon double nullable m2_hb_count_rate MOS2 2.0-4.5 keV Rate ct/s phot.count;em.X-ray.medium double nullable hardness_ratio_1c Hardness Ratio 1C phot.flux;arith.ratio;em.X-ray.soft double nullable pn_hb_count_rate EPN 2.0-4.5 keV Rate ct/s phot.count;em.X-ray.medium double nullable m2_mb_flux_error Error in Flux-MOS2e2 erg/s/cm^2 stat.error;phot.flux;em.X-ray.soft double nullable m2_sb0_count_rate_error Error in Rate-MOS2e0 ct/s stat.error;phot.count;em.X-ray.soft double nullable t11_cxo_name CXC Identification meta.id.cross char nullable m1_hb_detect_likelihood MOS1 2.0-4.5 keV Detection Likelihood stat.likelihood;em.X-ray.medium double nullable m2_mb_flux MOS2 1.0-2.0 keV Flux erg/s/cm^2 phot.flux;em.X-ray.soft double nullable m1_sb1_counts_error Error in Counts-MOS1e1 ct stat.error;phot;em.X-ray.soft double nullable pn_sb1_detect_likelihood EPN 0.5-1.0 keV Detection Likelihood stat.likelihood;em.X-ray.soft double nullable pn_sb0_flux EPN 0.2-0.5 keV Flux erg/s/cm^2 phot.flux;em.X-ray.soft double nullable m2_sb0_flux MOS2 0.2-0.5 keV Flux erg/s/cm^2 phot.flux;em.X-ray.soft double nullable m06_xmm_name XMM Identification meta.id.cross char nullable pn_sb0_detect_likelihood EPN 0.2-0.5 keV Detection Likelihood stat.likelihood;em.X-ray.soft double nullable mb_count_rate_error Error in Rate-e2 ct/s phot.count;em.X-ray.soft double nullable pn_mb_counts_error Error in Counts-EPNe2 ct stat.error;phot;em.X-ray.soft double nullable sb1_count_rate The 0.5-1.0 keV Rate ct/s phot.count;em.X-ray.soft double nullable pn_hb_exposure EPN 2.0-4.5 keV Exposure Time s time.duration;obs.exposure;em.X-ray.medium double nullable m1_sb0_counts MOS1 0.2-0.5 keV Source Counts ct phot;em.X-ray.soft double nullable pn_sb0_flux_error Error in Flux-EPNe0 erg/s/cm^2 stat.error;phot.flux;em.X-ray.soft double nullable pn_mb_counts EPN 1.0-2.0 keV Source Counts ct phot;em.X-ray.soft double nullable m1_sb0_flux_error Error in Flux-MOS1e0 erg/s/cm^2 stat.error;phot.flux;em.X-ray.soft double nullable pn_mb_detect_likelihood EPN 1.0-2.0 keV Detection Likelihood stat.likelihood;em.X-ray.soft double nullable m2_sb1_counts MOS2 0.5-1.0 keV Source Counts ct phot;em.X-ray.soft 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