Small Magellanic Cloud Deep Fields X-Ray Point Source Catalog

Small Magellanic Cloud Deep Fields X-Ray Point Source Catalog SMCDFSCXO ivo://nasa.heasarc/smcdfscxo NASA/GSFC HEASARC Laycock et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source This table contains the results of a pair of 100 ks Chandra observations of the Small Magellanic Cloud (SMC) to survey high-mass X-ray binaries (HMXBs), stars, and low-mass X-ray binaries (LMXBs)/cataclysmic variables down to LX = 4.3 x 1032 erg s-1. The two SMC Deep Fields (DFs) are located in the most active star-forming region of the SMC bar, with Deep Field-1 positioned at the most pulsar-rich location identified from previous surveys. Two new pulsars were discovered in outburst, CXOU J004929.7-731058 (P = 892 s) and CXOU J005252.2-721715 (P = 326 s), and three new HMXB candidates were identified. Of the 15 Be-pulsars now known in the field, 13 were detected, with pulsations seen in 9 of them. Ephemerides demonstrate that 6 of the 10 pulsars known to exhibit regular outbursts were seen outside their periastron phase, and quiescent X-ray emission at LX = 10(33-34) erg s-1 is shown to be common. Comparison with ROSAT, ASCA, and XMM-Newton catalogs resulted in positive identification of several previously ambiguous sources. Bright optical counterparts exist for 40 of the X-ray sources, of which 33 are consistent with early-type stars (MV < -2, B-V < 0.2), and are the subject of a companion paper to the reference paper. The results point to an underlying HMXB population density up to double that of active systems. The full catalog of 394 point sources is presented in this table; detailed analyses of the source timing and spectral properties are available in the reference paper. The aim-points for these Chandra observations were as follows: DF1 had J2000.0 coordinates of 00 53 34.50 -72 26 43.2 and DF2 had J2000.0 coordinates of 00 50 41.40 -73 16 10.3. This table was created by the HEASARC in August 2010 based on the electronic version of Table 2 from the reference paper which was obtained from the ApJ web site. This is a service provided by NASA HEASARC . 2010ApJ...716.1217L https://heasarc.gsfc.nasa.gov/W3Browse/all/smcdfscxo.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=smcdfscxo& GET text/xml 180 99999 true 12.42503 -73.387348 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=smcdfscxo GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_smcdfscxo&Action=More+Options&Action=Parameter+Search&ConeAdd=1 CHANDRA 0.0166666666666667 X-ray public smcdfscxo Small Magellanic Cloud Deep Fields X-Ray Point 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 95%-Confidence Radius (arcsec) arcsec stat.error;pos double nullable bb_count_rate Broad (0.5-8 keV) Band Count Rate ct/s phot.count;em.X-ray double nullable bb_count_rate_error Standard Error in Broad-Band Count Rate ct/s stat.error;phot.count;em.X-ray double nullable bb_flux_1 Broad (0.5-8 keV) Band X-Ray Flux erg/s/cm^2 phot.flux;em.X-ray double nullable bb_flux_1_error Standard Error in Broad-Band X-Ray Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray double nullable sb_flux_3_error Standard Error in Soft-Band X-Ray Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray.soft double nullable sb_flux_3 Soft (0.5-2 keV) Band X-Ray Flux erg/s/cm^2 phot.flux;em.X-ray.soft double nullable q_75_error Standard Error in 75-Percentile Photon Energy (keV) keV stat.error;stat.param;phys.energy double nullable counts Net Background-Subtracted Counts ct phot;em.X-ray double nullable bb_flux_3_error Standard Error in Broad-Band X-Ray Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray double nullable bii Galactic Latitude degree pos.galactic.lat double nullable bb_flux_2_error Standard Error in Broad-Band X-Ray Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray double nullable sb_flux_2_error Standard Error in Soft-Band X-Ray Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray.soft double nullable lii Galactic Longitude degree pos.galactic.lon double nullable sb_count_rate Soft (0.5-2 keV) Band Count Rate ct/s phot.count;em.X-ray.soft double nullable quantile_x_val_pos_err Standard Error Upper Bound on Quantile X Value stat.error;stat.param double nullable hb_flux_3 Hard (2-8 keV) Band X-Ray Flux erg/s/cm^2 phot.flux;em.X-ray.medium double nullable hb_flux_1 Hard (2-8 keV) Band X-Ray Flux erg/s/cm^2 phot.flux;em.X-ray.medium double nullable sb_flux_1_error Standard Error in Soft-Band X-Ray Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray.soft double nullable q_75 75-Percentile Photon Energy (keV) keV stat.param;phys.energy double nullable snr Signal-to-Noise Ratio stat.snr double nullable counts_error Standard Error in Net Background-Subtracted Counts ct stat.error;phot;em.X-ray double nullable quantile_x_val_neg_err Standard Error Lower Bound on Quantile X Value stat.error;stat.param double nullable quantile_x_val Quantile X Value for Plotting in Conventional Parameter Space stat.param double nullable bb_snr Broad (0.5-8 keV) Band Signal-to-Noise Ratio stat.snr;em.X-ray double nullable hb_flux_1_error Standard Error in Hard-Band X-Ray Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray.medium double nullable sb_snr Soft (0.5-2 keV) Band Signal-to-Noise Ratio stat.snr;em.X-ray.soft double nullable sb_flux_1 Soft (0.5-2 keV) Band X-Ray Flux erg/s/cm^2 phot.flux;em.X-ray.soft double nullable hb_flux_3_error Standard Error in Hard-Band X-Ray Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray.medium double nullable bb_flux_3 Broad (0.5-8 keV) Band X-Ray Flux erg/s/cm^2 phot.flux;em.X-ray double nullable hb_count_rate Hard (2-8 keV) Band Count Rate ct/s phot.count;em.X-ray.medium double nullable hb_snr Hard (2-8 keV) Band Signal-to-Noise Ratio stat.snr;em.X-ray.medium double nullable hb_flux_2 Hard (2-8 keV) Band X-Ray Flux erg/s/cm^2 phot.flux;em.X-ray.medium double nullable off_axis Distance from Chandra Aimpoint (arcmin) arcmin instr.offset double nullable q_50_error Standard Error in Median (50-Percentile) Photon Energy (keV) keV stat.error;stat.param;phys.energy double nullable quantile_y_val_pos_err Standard Error Upper Bound on Quantile Y Value stat.error;stat.param double nullable hb_flux_2_error Standard Error in Hard-Band X-Ray Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray.medium double nullable sb_count_rate_error Standard Error in Soft-Band Count Rate ct/s stat.error;phot.count;em.X-ray.soft double nullable hb_count_rate_error Standard Error in Hard-Band Count Rate ct/s stat.error;phot.count;em.X-ray.medium double nullable quantile_y_val_neg_err Standard Error Lower Bound on Quantile Y Value stat.error;stat.param double nullable q_25_error Standard Error in 25-Percentile Photon Energy (keV) keV stat.error;stat.param;phys.energy double nullable sb_flux_2 Soft (0.5-2 keV) Band X-Ray Flux erg/s/cm^2 phot.flux;em.X-ray.soft double nullable quantile_group Quantile-Based Classification meta.code short nullable quantile_y_val Quantile Y Value for Plotting in Conventional Parameter Space stat.param double nullable q_25 25-Percentile Photon Energy (keV) keV stat.param;phys.energy double nullable bb_flux_2 Broad (0.5-8 keV) Band X-Ray Flux erg/s/cm^2 phot.flux;em.X-ray double nullable q_50 Median (50-Percentile) Photon Energy (keV) keV stat.param;phys.energy 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