TAURUSXMM ivo://nasa.heasarc/taurusxmm NASA/GSFC HEASARC Guedel et al. 2026-07-17 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source The XMM-Newton Extended Survey of the Taurus Molecular Cloud (XEST) surveys the most populated ~5 square degrees of the Taurus Molecular Cloud, using the XMM-Newton X-ray observatory to study the thermal structure, variability, and long-term evolution of hot plasma, to investigate the magnetic dynamo, and to search for new potential members of the association. The authors present overall correlations with fundamental stellar parameters that were derived from the previous literature. The present overview paper introduces the project and provides the basic results from the X-ray analysis of all sources detected in the XEST survey. Comprehensive tables in the published paper summarize the stellar properties of all the targets surveyed. The survey goes deeper than previous X-ray surveys of Taurus by about an order of magnitude and for the first time systematically accesses very faint and strongly absorbed TMC objects. The authors find a detection rate of 85% and 98% for classical and weak-line T Tauri stars (CTTS and WTTS), respectively, and identify about half of the surveyed protostars and brown dwarfs. Overall, 136 out of 169 surveyed stellar systems were detected. The authors describe an X-ray luminosity vs. mass correlation, discuss the distribution of X-ray-to-bolometric luminosity ratios, and show evidence for lower X-ray luminosities in CTTS compared to WTTS. The complete catalog of all X-ray sources (stellar and non-stellar) detected in the 28 XEST fields is presented in this table. The catalog provides X-ray coordinates, their uncertainties, X-ray count rates and their uncertainties, and X-ray hardness ratios for 2347 detected X-ray sources. If two XEST fields overlap, the same sources may have been identified twice, with different XEST IDs assigned, notice. This table was created by the HEASARC in July 2007 based on the <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/A+A/468/353">CDS Catalog J/A+A/468/353</a> file table14.dat. This is a service provided by NASA HEASARC . 2007A&A...468..353G https://heasarc.gsfc.nasa.gov/W3Browse/all/taurusxmm.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=taurusxmm& GET text/xml 180 99999 true 67.87633333 17.9415 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=taurusxmm GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_taurusxmm&Action=More+Options&Action=Parameter+Search&ConeAdd=1 XMM-NEWTON 0.0166666666666667 X-ray public taurusxmm Taurus Molecular Cloud XMM-Newton 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 Positional Error (1 Sigma) arcsec stat.error;pos double nullable count_rate PN-Equivalent Full-Band Source Count Rate ct/s phot.count;em.X-ray double nullable count_rate_error Error in Full-Band Source Count Rate ct/s stat.error;phot.count;em.X-ray double nullable hardness_ratio Hardness Ratio (CRH-CRS)/(CRF) phot.count;em.X-ray;arith.ratio double nullable hardness_ratio_min Hardness Lower Limit (1 Sigma) phot.count;em.X-ray;arith.ratio;stat.min double nullable hardness_ratio_max Hardness Upper Limit (1 Sigma) phot.count;em.X-ray;arith.ratio;stat.max double nullable field_source_number XEST Source Number in Field meta.id short nullable lii Galactic Longitude degree pos.galactic.lon double nullable bii Galactic Latitude degree pos.galactic.lat double nullable hb_counts Number of Counts in Hard Band ct phot;em.X-ray.medium int nullable comments Comments meta.note char nullable detect_likelihood Maximum Likelihood in Full Band stat.likelihood;em.X-ray double nullable sb_exposure PN-Equivalent Soft-Band Exposure Time s time.duration;obs.exposure;em.X-ray.soft int nullable exposure PN-Equivalent Full-Band Exposure Time s time.duration;obs.exposure int nullable sb_count_rate_error Error in Soft-Band Source Count Rate ct/s stat.error;phot.count;em.X-ray.soft double nullable hb_exposure PN-Equivalent Hard-Band Exposure Time s time.duration;obs.exposure;em.X-ray.medium int nullable hb_count_rate PN-Equivalent Hard-Band Source Count Rate ct/s phot.count;em.X-ray.medium double nullable sb_count_rate PN-Equivalent Soft-Band Source Count Rate ct/s phot.count;em.X-ray.soft double nullable hb_count_rate_error Error in Hard-Band Source Count Rate ct/s double nullable counts Number of Counts in Full Band ct phot;em.X-ray int nullable hb_detect_likelihood Maximum Likelihood in Hard Band stat.likelihood;em.X-ray.medium double nullable sb_detect_likelihood Maximum Likelihood in Soft Band stat.likelihood;em.X-ray.soft double nullable xest_field XEST Field Number meta.id;obs.field short nullable alt_name Alternate Designation meta.id char nullable source_number Sequential Identification Number for Each Source in Catalog meta.id short nullable sb_counts Number of Counts in Soft Band ct phot;em.X-ray.soft int 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