PSPC/SMC ivo://nasa.heasarc/smcrosxray NASA/GSFC HEASARC Kahabka, Pietsch, Filipovic, Haberl 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source This catalog presents the results of a systematic search for point-like and moderately extended soft (0.1-2.4 keV) X-ray sources in a raster of nine pointings covering a field of 8.95 square degrees which was performed with the ROSAT PSPC between October 1991 and October 1993 in the direction of the Small Magellanic Cloud (SMC). 248 objects were detected and are included in this first version of the SMC catalog of soft X-ray sources. The authors set up seven source classes defined by selections in the count rate, hardness ratio and source extent parameters. They found five high luminosity super-soft sources (1E 0035.4-7230, 1E 0056.8-7146, RX J0048.4-7332, RX J0058.6-7146 and RX J0103-7254), one low-luminosity super-soft source RX J0059.6-7138 correlating with the planetary nebula L357, 51 candidate hard X-ray binaries including eight bright hard X-ray binary candidates, 19 supernova remnants (SNRs), 19 candidate foreground stars and 53 candidate background active galactic nuclei (and quasars). Likely classifications are given for about 60% of the catalogued sources. The total count rate of the detected point-like and moderately extended sources in the catalog is 6.9 +/- 0.3 counts s<sup>-1</sup>, comparable to the background subtracted total rate from the integrated field of about 6.1 +/- 0.1 counts s<sup>-1</sup>. This online catalog was created by the HEASARC in July 1999 based on tables obtained from the ADC/CDS data centers. It was last updated in October 2025 in order to rename some parameters to conform to HEASARC norms. This is a service provided by NASA HEASARC . 1999A&AS..136...81K https://heasarc.gsfc.nasa.gov/W3Browse/all/smcrosxray.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=smcrosxray& GET text/xml 180 99999 true 11.0104 -74.2647 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=smcrosxray GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_smcrosxray&Action=More+Options&Action=Parameter+Search&ConeAdd=1 ROSAT 0.0166666666666667 X-ray public smcrosxray ROSAT PSPC Survey of the Small Magellanic Cloud name ROSAT Source Designation meta.id 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 Position Uncertainty (arcsec) arcsec stat.error;pos short nullable count_rate Count Rate (cts/sec) ct/s phot.count;em.X-ray.soft double nullable count_rate_error Count Rate Error ct/s stat.error;phot.count;em.X-ray.soft double nullable spect_type Spectral Type of SIMBAD Star src.spType char nullable app_mag Apparent Magnitude of SIMBAD Star mag phot.mag;em.opt double nullable likelihood Likelihood Ratio of Existence stat.likelihood short nullable ww_number Source Number in Wang & Wu Catalog meta.id short nullable note Note on Radio or Optical Identification(s) meta.note char nullable catalog_name Catalog Source Designation meta.id;meta.main char nullable simbad_offset PSPC-SIMBAD Star Offset (arcsec) arcsec pos.angDistance short nullable einstein_offset PSPC-Einstein Offset (arcsec) arcsec pos.angDistance short nullable hardness_ratio_1 Soft Hardness Ratio HR1 phot.flux;arith.ratio;em.X-ray.soft double nullable broad_class Broad Classification src.class char nullable lii Galactic Longitude degree pos.galactic.lon double nullable refined_class Refined Classification src.class char nullable bii Galactic Latitude degree pos.galactic.lat double nullable source_extent Extent of Source (arcsec) arcsec phys.angSize short nullable hardness_ratio_2 Hard Hardness Ratio HR2 phot.flux;arith.ratio;em.X-ray.soft double nullable hardness_ratio_1_error 1-Sigma Error in HR1 stat.error;phot.flux;arith.ratio double nullable class Browse Object Classification src.class short nullable off_axis Source Off-axis Angle (arcmin) arcmin instr.offset short nullable hardness_ratio_2_error 1-Sigma Error in HR2 stat.error;phot.flux;arith.ratio 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