GC47TUCCX2 ivo://nasa.heasarc/gc47tuccx2 NASA/GSFC HEASARC Bhattacharya et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source The authors 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. This work combined 180 ks of new Chandra ACIS data on 47 Tuc with 370 ks of archival data and used improved algorithms to generate a new source catalog, finding 81 new sources for a total of 370 within the half-mass region (2.79 arcsec) of the cluster. The majority of the newly identified sources are in the crowded core region, indicating cluster membership. The authors associated five of the new X-ray sources with chromospherically active BY Dra or W UMa variables identified by Albrow et al. (2001, <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/ApJ/559/1060">CDS Cat. <J/ApJ/559/1060></a>). See also the related <a href="gc47tuccxo.html">2005 source catalog</a>. This table was created by the HEASARC in September 2020 based upon the <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/MNRAS/472/3706">CDS Catalog J/MNRAS/472/3706</a> files table2.dat, table4.dat, and table5.dat. The optical names from Albrow et al. (2001) were subsequently corrected in October 2020 in order to use the recommendation from the CDS Dictionary of Nomenclature of Celestial Objects. This is a service provided by NASA HEASARC . 2017MNRAS.472.3706B https://heasarc.gsfc.nasa.gov/W3Browse/all/gc47tuccx2.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=gc47tuccx2& GET text/xml 180 99999 true 6.02505 -72.123685 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=gc47tuccx2 GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_gc47tuccx2&Action=More+Options&Action=Parameter+Search&ConeAdd=1 CHANDRA 0.0166666666666667 X-ray public gc47tuccx2 47 Tuc Globular Cluster Chandra X-Ray Point Source Catalog (2017 name Source Designation (CXOGlb JHHMMSS.s+DDMMSS) meta.id;meta.main char nullable alt_name Alternative Catalog-Based 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 counts 0.5-6keV Net Counts ct phot;em.X-ray double nullable counts_pos_err Upper Error in 0.5-6keV Net Counts ct stat.error;phot;em.X-ray double nullable counts_neg_err Lower Error in 0.5-6keV Net Counts ct stat.error;phot;em.X-ray double nullable lx 0.5-6keV Luminosity erg/s phys.luminosity;em.X-ray double nullable lx_pos_err Upper Error in 0.5-6keV Luminosity erg/s stat.error;phys.luminosity;em.X-ray double nullable lx_neg_err Lower Error in 0.5-6keV Luminosity erg/s stat.error;phys.luminosity;em.X-ray 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 rel_offset_limit Limit Flag for Total Deviation Divided by the X-Ray Error (D/Xerr) meta.code.error char nullable radio_name MSP Radio Detection Name (e.g. 47 Tuc E), meta.id.cross;em.radio char nullable radio_dec_offset Deviation Between X-Ray and Radio Positions in Declination arcsec pos.eq.dec;arith.diff double nullable exposure Exposure Time s time.duration;obs.exposure double nullable hst_dec_offset Chandra Minus HST Declination arcsec pos.eq.dec;arith.diff double nullable hst_ra_offset Chandra Minus HST Right Ascension arcsec pos.eq.ra;arith.diff double nullable sb_counts_pos_err Upper Error in 0.5-2keV Net Counts ct stat.error;phot;em.X-ray.soft double nullable radio_dec_offset_2 Second Deviation in Declination, If Two Possibilities arcsec pos.eq.dec;arith.diff double nullable radio_ra_offset Deviation Between X-Ray and Radio Positions in Right Ascension arcsec pos.eq.ra;arith.diff double nullable agb2001_name Albrow et al. (2001, Cat. J/ApJ/559/1060) Designation meta.id;src char nullable note_flag Note Concerning Source meta.note char nullable rel_offset Total Deviation Divided by the X-Ray Error (D/Xerr) stat.error double nullable bii Galactic Latitude degree pos.galactic.lat double nullable lii Galactic Longitude degree pos.galactic.lon double nullable period Period (from Albrow et al., 2001, Cat. J/ApJ/559/1060) d time.period double nullable psf_fraction PSF Fraction instr.det.psf double nullable source_type Source Type (from Albrow et al., 2001, Cat. J/ApJ/559/1060) src.class char nullable radio_name_2 Second MSP Radio Detection Designation, If Two Possibilities meta.id.cross;em.radio char nullable sb_counts_neg_err Lower Error in 0.5-2keV Net Counts ct stat.error;phot;em.X-ray.soft double nullable sb_counts 0.5-2keV Net Counts ct phot;em.X-ray.soft double nullable radio_ra_offset_2 Second Deviation in Right Ascension, If Two Possibilities arcsec pos.eq.ra;arith.diff double nullable source_number Sequential Identification Number for Each Source in the Catalog meta.id;src short nullable error_radius RMS Uncertainty in Position arcsec stat.error;pos double nullable