J/ApJS/102/75 J/ApJS/102/75 ROSAT Observations of the Pleiades G Micela S Sciortino V Kashyap F R Harnden R Rosner Astrophys. J. Suppl. 102 75 1996 1996ApJS..102...75M I/90 : Positions of 502 Stars in Pleiades Region (Eichhorn+ 1970) I/163 : US Naval Observatory Pleiades Catalog (Van Flandern 1969) Clusters, open Rotational velocities X-ray sources Of 214 stars in the core of the Pleiades, 99 were detected in X-rays with the ROSAT PSPC. This catalog lists the characteristics of the stars taken from the literature, in table1.dat and the rotational and X-ray characteristics in table5.dat.

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). This list has been extended by the results of recent surveys to a completeness limit of visual magnitude about 18. ROSAT

ID Micela number --- name Name --- RAh Right Ascension hours (J2000) h RAm Right Ascension minutes (J2000) min RAs Right Ascension seconds (J2000) s DE- Declination sign (J2000) --- DEd Declination degrees (J2000) deg DEm Declination minutes (J2000) arcmin DEs Declination seconds (J2000) arcsec Vmag V magnitude mag r_Vmag Reference for Vmag --- B-V B-V color mag Sp Spectral type --- r_Sp Reference for spectral type --- l_vsini < indicates upper limit for vsin(i) --- vsini Rotation velocity * sin(inclination) From Soderblom et al. (1993ApJS...85..315S; Cat. <J/ApJS/85/315>) km/s rem Notes --- r_vsini Reference --- ID Micela number --- rem "*" indicates E(B-V) > 0.1 --- name Name --- oRA Difference in right ascension The difference between the position derived from the ROSAT image and the catalog position of the suggested identification for sources not in complexes of overlapping sources. s oDE Difference in declination arcsec off_axis Off axis value The spatial resolution of ROSAT degrades with distance from the axis. The accuracy radius for identification is taken as 30" sources within 20' of the axis and 60" for sources between 30' and 50'. Sources beyond 50' from the axis were not included. arcmin l_CtRate < indicates upper limit for CtRate --- CtRate Count rate ct/ks S/N Signal/noise ratio --- HR Hardness ratio HR = (counts(0.2-0.9 keV))/(counts(0.9-2.01 keV)) --- e_HR Mean error on HR --- cecf Counts-to-energy conversion factor 10-14W/ct l_log_Lx < indicates upper limit for log(Lx) --- log_Lx Log of X-ray luminosity Computed for assumed distance of 127 pc. 10-7W mcpt Multiple counterparts Numbers indicate sources identified with more than one star or un complexes of overlapping sources. Stars with the same number are identified with the same X-ray source. --- RefNo Reference number --- Text Text of reference, starting by the bibcode --- N. G. Roman ADC/SSDOO 1997, rev. F. Ochsenbein [CDS] 18-Jul-1998Feb21 J_ApJS_102_75.xml