NGC2516CXO ivo://nasa.heasarc/ngc2516cxo NASA/GSFC HEASARC Damiani et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source The NGC 2516 Chandra X-Ray Point Source Catalog is the result of a comprehensive study of the Chandra X-ray observations of the young open star cluster NGC 2516. The authors have analyzed eight individual Chandra observations, comprising 5 ACIS and 3 HRC-I observations. They have combined these datasets to achieve the greatest sensitivity, reaching down to a threshold level of log f<sub>X</sub> = -14.56 (erg/s/cm<sup>2</sup>), or log L<sub>X</sub> = 28.69 (erg/s) at the 387 pc distance of NGC 2516. Out of 284 X-ray sources detected, 155 are identified with photometric cluster members, with very little ambiguity, another 60 with non-members. There are 4 X-ray sources with two possible optical identifications (one cluster member and one nonmember for each), with no obvious choice between the two candidates. These 4 X-ray sources are listed in this Browse table twice, one for each optical counterpart, hence there are (284 + 4 =) 288 entries. There remain 73 X-ray sources without an optical identification with the authors' optical catalog stars. This Browse table was created by the HEASARC in December 2006, based on CDS table J/ApJ/588/1009, files table4.dat and table5.dat. This is a service provided by NASA HEASARC . 2003ApJ...588.1009D https://heasarc.gsfc.nasa.gov/W3Browse/all/ngc2516cxo.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=ngc2516cxo& GET text/xml 180 99999 true 119.76016667 -61.06302778 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=ngc2516cxo GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_ngc2516cxo&Action=More+Options&Action=Parameter+Search&ConeAdd=1 CHANDRA 0.0166666666666667 Optical X-ray public ngc2516cxo NGC 2516 Chandra X-Ray Point 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 photon_flux Mean Source X-Ray Photon Flux photon/s/cm^2 double nullable photon_flux_error Error in Photon Flux photon/s/cm^2 double nullable jth_number Jeffries et al. (2001A&A...375..863J) Number int nullable vmag The V Band Magnitude mag phot.mag;em.opt.V double nullable log_lx Log of X-Ray Luminosity (in Units of erg/s) log(erg/s) double nullable source_number Sequential Identification Number for Each Source in Catalog meta.id;src short nullable bv_color The (B-V) Color mag phot.color;em.opt.B;em.opt.V double nullable error_radius Positional Error (arcsec) arcsec stat.error;pos float nullable lii Galactic Longitude degree pos.galactic.lon double nullable number_detections Number of Detections short nullable binary_flag Flag Indicates Binary char nullable vi_color The (V-I) Color mag double nullable cluster_flag Flag Indicates Cluster Membership char nullable bii Galactic Latitude degree pos.galactic.lat 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 off_set Optical-X-ray Offset (arcsec) arcsec float nullable