J/AJ/126/1996ivo://CDS.VizieR/J/AJ/126/1996doi:10.26093/cds/vizier.51261996CDSMakarov V.V.2023-04-06T16:50:57Z2005-04-29T19:40:38ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frx-ray-sourcesBased on the Hipparcos and Tycho-2 astrometric catalogs and the ROSAT surveys, a sample of ~100 stars most luminous in X-rays within or around a distance of 50 pc is culled. The smallest X-ray luminosity in the sample is LX=9.8x10^29^erg/s; the strongest source in the solar neighborhood is II Peg, a RS CVn star, at LX=175.8x10^29^erg/s. With respect to the origin of X-ray emission, the sample is divided into partly overlapping classes of pre-main-sequence, post-T Tauri, and very young ZAMS objects (type XY), RS CVn-type binary stars (type RS), other active short-period binaries, including binary BY Dra-type objects (type XO), apparently single or long-period binary active evolved stars (type XG), contact binaries of WU UMa kind (type WU), apparently single or long-period binary variable stars of BY Dra kind (type BY), and objects of unknown nature (type X?). Chromospherically active, short-period binaries (RS and XO) make up 40% of the brightest X-ray emitters, followed by young stars (XY) at 30% and unknown sources (X?) at 15%.2003AJ....126.1996Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/126/1996CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)I/259 : The Tycho-2 Catalogue (Hog+ 2000)III/135 : Henry Draper Catalogue and Extension (Cannon+ 1918-1924; ADC 1989)J/A+AS/135/319 : ROSAT data of Nearby Stars (Huensch+ 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/126/1996https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/126/1996http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/126/1996https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/126/1996https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/126/1996http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/126/1996GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/126/1996/table1 (The 101 Brightest X-Ray Stars within 50 Parsecs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/126/1996/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/126/1996/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/126/1996/table1?GETtext/xml+votable180.050000true3.126295814.56352190.0055555555555555566/311 493 845 924 1412 1504 1704 1762 1787 3986 4143 4566 5772 6241 7262 7610 8689 9442 10246 10481 11856 12092 13110 13778 13802 13947 14005 14476 14512 16186 16220 16338 16834 17194 18234 19670 20263 20286 21386 22146 22939 23176 23191 23538 24687 24971 25113 25930 26460 29620 32147 32516 32542 32575 32617 32743 33116 33572 33707 33815 33966 34244 34464 34829 34886 35018 35025 35128 35191 35354 35690 37419 37746 38095 38168 38936 39464 39954 40656 41039 41290 41295 41465 41798 42216 42751 43072 44361 45249 45382 45927 45934 45944 46709 47287 47299 47904 48163 489053.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/126/1996?format=asciiX-raydefaultJ/AJ/126/1996/table1The 101 Brightest X-Ray Stars within 50 ParsecsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint1RXSROSAT name (JHHMMSS.s+DDMMSS)meta.id.crosscharHIPHipparcos numbermeta.id;meta.mainintprimaryKinindicates that the kinematicaml parameters are available in table4meta.ref.urlcharHD? HD numbermeta.idintnullableNameAlternative namemeta.idcharATypeType of activity (G1)src.classcharSpTypeSpectral type and classsrc.spTypecharVmagHipparcos V-band magnitudemagphot.mag;em.opt.VfloatB-VHipparcos (B-V) colormagphot.color;em.opt.B;em.opt.VfloatplxHipparcos parallaxmaspos.parallaxfloate_plxFormal standard error in plxmasstat.error;pos.parallaxfloatLXX-ray luminosity in units of 10^29^ergs/s1e+22Wphys.luminosity;em.X-rayfloatHR1ROSAT hardness ratiophot.flux;arith.ratiofloatBTypeType of binarity (2)src.classcharpmRARight ascension component of proper motionmas/yrpos.pm;pos.eq.rafloatpmDEDeclination component of proper motionmas/yrpos.pm;pos.eq.decfloatRV? Radial velocitykm/sphys.veloc;pos.heliocentricfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/AJ/126/1996/table4Kinematics of nearby X-ray starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintATypeType of activity (G1)src.classcharHIPHipparcos numbermeta.id;meta.mainintUvelU velocitykm/sphys.veloc;pos.cartesian.xfloatVvelV velocitykm/sphys.veloc;pos.cartesian.yfloatWvelW velocitykm/sphys.veloc;pos.cartesian.zfloatVlsrLSR velocitykm/sphys.veloc;pos.lsrfloat