J/A+A/661/A35ivo://CDS.VizieR/J/A+A/661/A35doi:10.26093/cds/vizier.36610035CDSSaeedi S.Liu T.Knies J.Sasaki M.Becker W.Bulbul E.Dennerl K.,Freyberg M.Laktionov R.Merloni A.2022-06-13T11:32:07Z2022-05-18T13:56:18ZCDS support team

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

cds-question@unistra.frglobular-star-clustersx-ray-binary-starsinfrared-photometryvisible-astronomyWe present the results of the analysis of five observations of the globular cluster 47 Tucanae (47 Tuc) with eROSITA (extended Roentgen Survey with an Imaging Telescope Array) on board Spektrum-Roentgen-Gamma (Spektr-RG, SRG). The aim of the work is the study of the X-ray population in the field of one of the most massive globular clusters in our Milky Way. We focused on the classification of point-like sources in the field of 47 Tuc. The unresolved dense core of 47 Tuc (1.7' radius) and also the sources, which show extended emission are excluded in this study. We applied different methods of X-ray spectral and timing analysis together with multi wavelength studies for the classification of the X-rays sources in the field of 47 Tuc. We detected 888 point-like sources in the energy range of 0.2-5.0keV. We identified 126 background AGNs and 25 foreground stars. One of the foreground stars is classified as a variable M dwarf. We also classified 14 X-ray sources as members of 47 Tuc, including 1 symbiotic stars, 2 quiescent low mass X-ray binaries, and 4 cataclysmic variable. There are also 5 X-ray sources, which can either be a cataclysmic variable or a contact binary, and also 1 X-ray sources which can be an active binary (Type RS CVn). We identified one X-ray binary, which belongs to the Small Magellanic Cloud. Moreover, we calculated the X-ray luminosity function of 47 Tuc. No significant population that seems to belong to the globular cluster has been observed in the energy range of 0.5-2.0keV using eROSITA observations.2022A&A...661A..35Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/661/A35CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/661/A1 : The eFEDS X-ray catalogs (V7.4) (Brunner+, 2022)J/A+A/661/A2 : Galaxy clusters and groups in eFEDS (Liu+, 2022)J/A+A/661/A3 : eFEDS counterparts to point-like sources (Salvato+, 2022)J/A+A/661/A4 : eFEDS optical cluster and group catalog (Klein+, 2022)J/A+A/661/A5 : The eFEDS AGN catalog (Liu+, 2022)J/A+A/661/A7 : X-ray properties of eFEDS clusters and groups (Bahar+, 2022)J/A+A/661/A8 : eFEDS catalogue of variable X-ray sources (Boller+, 2022)J/A+A/661/A10 : eFEDS galaxy clusters and groups in disguise (Bulbul+, 2022)J/A+A/661/A23 : Exoplanet X-ray irradiation & evaporation rates (Foster+, 2022)J/A+A/661/A24 : Corona-chromosphere connection (Fuhrmeister+, 2022)J/A+A/661/A29 : First eROSITA study of nearby M dwarfs (Magaudda+, 2022)J/A+A/661/A34 : eta Cha cluster eROSITA X-ray scan (Robrade+, 2022)J/A+A/661/A38 : SRG/ART-XC 1st year all-sky X-ray survey (Pavlinsky+, 2022)J/A+A/661/A40 : eRASS1 X-ray sources Sco-Cen members (Schmitt+, 2022)J/A+A/661/A44 : A first eROSITA view of ultracool dwarfs (Stelzer+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/661/A35https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/661/A35http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/661/A35https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/661/A35https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/661/A35http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/661/A35GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/661/A35/tableb1 (X-ray sources in the FOV of 47 Tuc)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/661/A35/tableb1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/661/A35/tableb1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/661/A35/tableb1?GETtext/xml+votable180.050000true3.9341667-72.02794440.0055555555555555566/33315 33318 33321 33323-33324 333267.952274030004205e-20 4.253631036678812e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/661/A35?format=asciiOpticalInfrareddefaultJ/A+A/661/A35/tableb1X-ray sources in the FOV of 47 TucNoSequential numbermeta.recordintprimaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordinteROSITAeROSITA SRC-Name (SRGJHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.maine_pos1 sigma positional error of the sourcearcsecstat.errorfloatFObs1? Flux in 0.2-5keV band for observation 11e-17W.m**-2phot.flux;em.X-rayfloatnullablee_FObs1? rms uncertainty on FObs11e-17W.m**-2stat.errorfloatnullableFObs2? Flux in 0.2-5keV band for observation 21e-17W.m**-2phot.flux;em.X-rayfloatnullablee_FObs2? rms uncertainty on FObs21e-17W.m**-2stat.errorfloatnullableFObs3? Flux in 0.2-5keV band for observation 31e-17W.m**-2phot.flux;em.X-rayfloatnullablee_FObs3? rms uncertainty on FObs31e-17W.m**-2stat.errorfloatnullableFObs4? Flux in 0.2-5keV band for observation 41e-17W.m**-2phot.flux;em.X-rayfloatnullablee_FObs4? rms uncertainty on FObs41e-17W.m**-2stat.errorfloatnullableFObs5? Flux in 0.2-5keV band for observation 51e-17W.m**-2phot.flux;em.X-rayfloatnullablee_FObs5? rms uncertainty on FObs51e-17W.m**-2stat.errorfloatnullableHR1? Harness ratio 1 (0.2-0.6keV, 0.6-1.1keV)phot.flux;arith.ratiofloatnullablee_HR1? rms uncertainty on HR1stat.errorfloatnullableHR2? Harness ratio 2 (0.6-1.1keV, 1.1-2.3keV)phot.flux;arith.ratiofloatnullablee_HR2? rms uncertainty on HR2stat.errorfloatnullableHR3Harness ratio 3 (1.1-2.3keV, 2.3-5.0keV)phot.flux;arith.ratiofloate_HR3rms uncertainty on HR3stat.errorfloatVar? Variability of the sourcesrc.var.indexfloatnullablee_Var? rms uncertainty on Varstat.errorfloatnullableClassClassification (1)src.classcharCat[CalPV] CalPV: Source is in the eROSITA CalPV catalogue as wellmeta.codecharmoreindicates infrared and/or optical counterpart magnitudesmeta.ref.urlcharJ/A+A/661/A35/tableb2Infrared magnitudes of counterparts of X-ray sources of 47 tuc in different energy filters 2MASS and WISE surveyse_Ksmag? rms uncertainty on Ksmagmagstat.error;phot.magfloatnullablel_W4magLimit flag on W4magmeta.code.errorcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNoSequential numbermeta.recordintW1magW1 magnitude of the infrared counterpart of the X-ray sourcemagphot.mag;em.IR.3-4umfloate_W1magrms uncertainty on W1magmagstat.error;phot.magfloatW2magW2 magnitude of the infrared counterpart of the X-ray sourcemagphot.mag;em.IR.4-8umfloate_W2magrms uncertainty on W2magmagstat.error;phot.magfloatl_W3magLimit flag on W3meta.code.errorcharW3magW3 magnitude of the infrared counterpart of the X-ray sourcemagphot.flux.density;em.IR.8-15umfloate_W3mag? rms uncertainty on W3magmagstat.error;phot.magfloatnullableW4magW4 magnitude of the infrared counterpart of the X-ray sourcemagphot.flux.density;em.IR.15-30umfloate_W4mag? rms uncertainty on W4magmagstat.error;phot.magfloatnullableJmag? J magnitude of the infrared counterpart of the X-ray sourcemagphot.mag;em.IR.Jfloatnullablee_Jmag? rms uncertainty on Jmagmagstat.error;phot.magfloatnullableHmag? H magnitude of the infrared counterpart of the X-ray sourcemagphot.mag;em.IR.Hfloatnullablee_Hmag? rms uncertainty on Hmagmagstat.error;phot.magfloatnullableKsmag? Ks magnitude of the infrared counterpart of the X-ray sourcemagphot.mag;em.IR.KfloatnullableJ/A+A/661/A35/tableb3Optical magnitudes of counterparts of X-ray sources of 47 Tuc in Gaia and SkyMapper Southern Sky SurveyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNoSequential numbermeta.recordintGmagGaia G (300nm) magnitude of Gaia counterpart of the X-ray sourcemagphot.mag;em.optfloate_Gmagrms uncertainty on Gmagmagstat.error;phot.magfloatBPmag? Gaia BP (400-500nm) magnitude of Gaia counterpart of the X-ray sourcemagphot.mag;em.opt.Bfloatnullablee_BPmag? rms uncertainty on BPmagmagstat.error;phot.magfloatnullableRPmag? Gaia RP (600-750nm) magnitude of Gaia counterpart of the X-ray sourcemagphot.mag;em.opt.Rfloatnullablee_RPmag? rms uncertainty on RPmagmagstat.error;phot.magfloatnullablegmag? SkyMapper g (467nm) magnitude of SkyMapper counterpart of the X-ray sourcemagphot.mag;em.opt.Bfloatnullablee_gmag? rms uncertainty on gmagmagstat.error;phot.magfloatnullablermag? SkyMapper r (616nm) magnitude of SkyMapper counterpart of the X-ray sourcemagphot.mag;em.opt.Rfloatnullablee_rmag? rms uncertainty on rmagmagstat.error;phot.magfloatnullableDist? Gaia distancepcpos.distancefloatnullablee_Dist? rms uncertainty on Gaia distancepcstat.errorfloatnullable