PSPC/Pleiades ivo://nasa.heasarc/pleiadxray NASA/GSFC HEASARC Micela et al. 2026-04-03 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Star This catalog contains the results of a deep X-ray survey of the core region of the Pleiades open cluster carried out with ROSAT. In a single PSPC field (~1 degree in radius), 99 of 214 Pleiades stars are detected in X-rays, and upper limits are computed for the remainder. This catalog lists the characteristics of these stars taken from the literature, including their rotational data, as well as their X-ray characteristics. The nucleus of the composite catalog used in this study is the catalog compiled from the published literature for the Einstein investigations of the Pleiades (Micela et al. 1990, ApJ, 348, 557). This list has been extended by the results of recent surveys to a completeness limit of visual magnitude of about 18. This database was created at the HEASARC in April 2002 based on the ADC/<a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/ApJS/102/75">CDS Catalog J/ApJS/102/75</a> and is derived from Tables 1 and 5 of the published paper. This is a service provided by NASA HEASARC . 1996ApJS..102...75M https://heasarc.gsfc.nasa.gov/W3Browse/all/pleiadxray.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=pleiadxray& GET text/xml 180 99999 true 56.70291667 23.06902778 0.0333333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=pleiadxray GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_pleiadxray&Action=More+Options&Action=Parameter+Search&ConeAdd=1 STAR CATALOG 0.0333333333333333 X-ray public pleiadxray ROSAT PSPC Catalog of the Pleiades (Micela et al. 1996) vmag V Magnitude mag phot.mag;em.opt.V double nullable offaxis Off Axis Value (arcmin) arcmin double nullable name Source Designation meta.id;meta.main char nullable offset_ra Difference in Right Ascension (arcsec) arcsec double nullable class Browse Object Classification src.class short nullable "__x_ra_dec" System unit vector column double nullable "__y_ra_dec" System unit vector column double nullable vsini Rotation Velocity * sin(Inclination) km/s short nullable hardness_ratio Hardness Ratio phot.flux;arith.ratio;em.X-ray double nullable micela_number Micela Number short nullable bv_color B-V Color mag phot.color;em.opt.B;em.opt.V double nullable ref_vmag Reference for V Magnitude short nullable limit_log_lx Flag Indicates Upper Limit for log(Lx) char nullable dec Declination degree pos.eq.dec;meta.main double nullable ref_spect_type Reference for Spectral Type short nullable limit_count_rate Flag Indicates Upper Limit for Count Rate char nullable log_lx Log of X-Ray Luminosity log(10^-7_W) double nullable "__row" System index column char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable bii Galactic Latitude degree pos.galactic.lat double nullable multiple_cpt_flag Flag Indicates Multiple Counterparts short nullable spect_type Spectral Type src.spType char nullable lii Galactic Longitude degree pos.galactic.lon double nullable limit_vsini Flag Indicates Upper Limit for vsin(i) char nullable ref_remarks Reference char nullable extinction_flag Flag Indicates E(B-V) > 0.1 char nullable snr Signal-to-Noise Ratio stat.snr double nullable offset_dec Difference in Declination (arcsec) arcsec double nullable count_rate Count Rate (ct/s) ct/s phot.count;em.X-ray double nullable hardness_ratio_error Mean Error on Hardness Ratio stat.error;phot.flux;arith.ratio;em.X-ray double nullable remarks Notes char nullable "__z_ra_dec" System unit vector column double nullable conversion_factor Counts-to-Energy Conversion Factor (10^-14 W/ct) 10^-14_W/ct double nullable