J/MNRAS/472/3706ivo://CDS.VizieR/J/MNRAS/472/3706doi:10.26093/cds/vizier.74723706CDSBhattacharya S.Heinke C.O.Chugunov A.I.Freire P.C.C.Ridolfi A.,Bogdanov S.2024-08-17T20:21:00Z2020-08-11T10:04:23ZCDS support team

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

cds-question@unistra.frglobular-star-clustersx-ray-sourcesWe combined Chandra ACIS observations of the globular cluster 47 Tucanae (47 Tuc) from 2000, 2002 and 2014-2015 to create a deeper X-ray source list, and study some of the faint radio millisecond pulsars (MSPs) present in this cluster. We have detected 370 X-ray sources within the half-mass radius (2.79 arcsec) of the cluster, 81 of which are newly identified, by including new data and using improved source detection techniques. The majority of the newly identified sources are in the crowded core region, indicating cluster membership. We associate five of the new X-ray sources with chromospherically active BY Dra or W UMa variables identified by Albrow et al. We present alternative positions derived from two methods, centroiding and image reconstruction, for faint, crowded sources. We are able to extract X-ray spectra of the recently discovered MSPs 47 Tuc aa, 47 Tuc ab, the newly timed MSP 47 Tuc Z, and the newly resolved MSPs 47 Tuc S and 47 Tuc F. Generally, they are well fitted by blackbody or neutron star atmosphere models, with temperatures, luminosities and emitting radii similar to those of other known MSPs in 47 Tuc, though 47 Tuc aa and 47 Tuc ab reach lower X-ray luminosities. We limit X-ray emission from the full surface of the rapidly spinning (542 Hz) MSP 47 Tuc aa, and use this limit to put an upper bound for amplitude of r-mode oscillations in this pulsar as {alpha}<2.5x10^-9^ and constrain the shape of the r-mode instability window.2017MNRAS.472.3706Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/472/3706CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/559/1060 : Variables in 47 Tuc (Albrow+, 2001)J/A+A/372/85 : Detected sources at 12{mu}m in 47 Tuc (Ramdani+, 2001)J/other/Sci/292.2290 : Chandra compact binaries in 47 Tuc (Grindlay+, 2001)J/ApJ/625/796 : X-ray sources in globular cluster 47 Tuc (Heinke+, 2005)J/A+A/537/A2 : 8.6um imaging of 47 Tuc (Momany+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/472/3706https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/472/3706http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/472/3706https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/472/3706https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/472/3706http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/472/3706GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/472/3706/table2 (47 Tuc basic X-ray source properties, combined data set)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/472/3706/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/472/3706/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/472/3706/table2?GETtext/xml+votable180.050000true6.0177125-72.082771110.005555555555555556Cone search capability for table J/MNRAS/472/3706/table3 (Alternative positions of crowded sources, obtained from image reconstruction)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/472/3706/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/472/3706/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/472/3706/table3?GETtext/xml+votable180.050000true6.03059167-72.080361940.0055555555555555566/33321https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/472/3706?format=asciiX-raydefaultJ/MNRAS/472/3706/table247 Tuc basic X-ray source properties, combined data setrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMoreindicates more informations on tables 3-5meta.ref.urlcharWLabel (wavdetect number), will be [GHE2001] WNNN in Simbadmeta.idintprimaryCXOGlbCXOGlb J designation (HHMMSS.s+DDMMSS)meta.id;meta.maincharRAJ2000Right ascension (J2000) (1)pos.eq.ra;meta.mainDEJ2000Declination (J2000) (1)pos.eq.dec;meta.mainePosrms uncertainty on position (2)arcsecstat.errorfloatfPSFPSF fractioninstr.det.psffloatfExpoFractional exposure timetime.duration;arith.ratio;obs.exposurefloatncts0.5-20.5-2keV net countsctphot.count;em.X-rayfloate_ncts0.5-2Error on ncts0.5-2 (lower value)ctstat.errorfloatE_ncts0.5-2Error on ncts0.5-2 (upper value)ctstat.error;stat.maxfloatncts0.5-60.5-6keV net countsctphot.count;em.X-rayfloate_ncts0.5-6Error on ncts0.5-2 (lower value)ctstat.errorfloatE_ncts0.5-6Error on ncts0.5-2 (upper value)ctstat.error;stat.maxfloatlum0.5-60.5-6keV luminosity1e+23Wphys.luminosity;em.X-rayfloate_lum0.5-6Error on lum0.5-6 (lower value)1e+23Wstat.errorfloatE_lum0.5-6Error on lum0.5-6 (upper value)1e+23Wstat.error;stat.maxfloatNotesNotes (3)meta.notecharJ/MNRAS/472/3706/table3Alternative positions of crowded sources, obtained from image reconstructionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWLabel (wavdetect number)meta.idintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainJ/MNRAS/472/3706/table4Deviations in X-ray positions of individual MSPs from their known radio positionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWLabel (wavdetect number)meta.idintMSPMSP radio detection name (e.g. 47 Tuc E),meta.idcharDRADeviation in right ascensionarcsecpos.eq.ra;arith.difffloatDRA2? Second deviation in right ascension, if two possibilitiesarcsecpos.eq.ra;arith.difffloatnullableDDEDeviation in declinationarcsecpos.eq.dec;arith.difffloatDDE2? Second deviation in declination, if two possibilitiesarcsecpos.eq.dec;arith.difffloatnullableXerr95 per cent confidence error circle radius on the X-ray position (following Heinke et al., 2005, Cat. J/ApJ/625/796)arcsecstat.error;phys.angSizefloatl_D/XerrLimit flag on D/Xerrmeta.code.errorcharD/XerrTotal deviation divided by the X-ray errorstat.errorfloatJ/MNRAS/472/3706/table5New optical counterpart identificationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWLabel (wavdetect number)meta.idintA01NameAlbrow et al. (2001, Cat. J/ApJ/559/1060) namemeta.idcharDRAChandra minus HST right ascensionarcsecpos.eq.ra;arith.difffloatDDEChandra minus HST declinationarcsecpos.eq.dec;arith.difffloatTypeType (from Albrow et al., 2001, Cat. J/ApJ/559/1060)src.classcharPerPeriod (from Albrow et al., 2001, Cat. J/ApJ/559/1060)dtime.periodfloat