M67CXO ivo://nasa.heasarc/m67cxo NASA/GSFC HEASARC van den Berg et al. 2026-10-02 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source The M 67 Chandra X-Ray Point Source Catalog contains the results of a 47 ks Chandra/ACIS observation of the old (4 Gyr) open cluster M67. The authors detected 25 proper-motion cluster members (including ten new sources) and 12 sources (all new) that they suspect to be M 67 members from their locations close to the main sequence (1 < B-V < 1.7). Of the detected members, 23 are binaries. In addition to cluster members, about 100 background sources were detected, many of which were identified with faint objects in the ESO Imaging Survey (EIS, Momany et al. 2001, A&A, 379, 436). This table summarizes the X-ray properties of the 158 sources which were detected by Chandra in this observation, and also lists the ROSAT (Belloni et al., 1998A&A...335..517B) and optical (candidate) counterparts. This table was created by the HEASARC in January 2007 based on CDS table J/A+A/418/509/table1.dat This is a service provided by NASA HEASARC . 2004A&A...418..509V https://heasarc.gsfc.nasa.gov/W3Browse/all/m67cxo.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=m67cxo& GET text/xml 180 99999 true 132.97158333 11.61577778 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=m67cxo GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_m67cxo&Action=More+Options&Action=Parameter+Search&ConeAdd=1 CHANDRA 0.0166666666666667 Optical X-ray public m67cxo M 67 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 count_rate Net 0.3-7keV Count Rate ct/s phot.count;em.X-ray.medium double nullable hardness_ratio Hardness Ratio phot.flux;arith.ratio;em.X-ray.medium;em.X-ray.soft double nullable hardness_ratio_error Error in Hardness Ratio stat.error;phot.flux;arith.ratio;em.X-ray.medium;em.X-ray.soft double nullable band_flag Flag [SHT] Indicates Energy Band of Most Significant Detection char nullable notes_flag Notes on Individual Sources char nullable ctrpart_name (Candidate) Optical Counterpart char nullable source_number Chandra Source Identification meta.id;src short nullable dec_error Error in Declination (arcsec) arcsec stat.error;pos.eq.dec;meta.main double nullable counts_error Error in Background-Corrected Counts ct stat.error;phot;em.X-ray.medium short nullable ra_error Error in Right Ascension (s) s stat.error;pos.eq.ra;meta.main double nullable lii Galactic Longitude degree pos.galactic.lon double nullable off_axis Distance from the Telescope Aimpoint (arcmin) arcmin instr.offset double nullable significance_flag Indicator of Significance of Detection char nullable bii Galactic Latitude degree pos.galactic.lat double nullable counts Background-Corrected 0.3-7keV Counts ct phot;em.X-ray.medium short nullable belloni_number (Candidate) ROSAT Counterpart in Belloni et al. short 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 Distance between Chandra and Optical Source arcsec double nullable