J/ApJ/351/492 J/ApJ/351/492 X-ray emission in the Ursa Major stream. J H M M Schmitt G Micela S Sciortino G S Vaiana F R Harnden R Rosner Astrophys. J. 351 492 1990 1990ApJ...351..492S J/ApJ/315/687 X-Ray emission from solar-type stars : F and G J/ApJ/348/253 Einstein Survey of Late-type Giant and Supergiant Stars J/ApJ/325/798 Einstein Survey of Hyades-cluster Region J/ApJ/348/557 Einstein Survey of the Pleiades Cluster Harnden, F.R., Jr., Fabricant, D.G., Harris, D.E., and Schwarz, J. 1984, Smithsonian Ap. Obs. Spec. Rept., No. 393. Clusters, open Stars, emission X-ray sources open clusters and associations: general stars: rotation X-rays: stars Results are reported from a comprehensive survey of X-ray emission from stars known or suspected to be members of the UMa cluster and/or stream. Of the 42 UMa member stars surveyed, 18 were detected as X-ray sources, and spectral analysis was performed for 10 stars with sufficient X-ray counts. Consideration is given to relations between X-ray luminosity, color, and kinematics of the sample stars, and the X-ray spectra of the UMa stars are discussed in the context of the general problem of stellar X-ray temperatures. Also confirmed is the lack of X-ray-emitting A dwarfs among UMa members; among stars of later spectral type there is a rather large dispersion in X-ray luminosity. This dispersion cannot readily be explained by contamination with field star interlopers and appears rather to be a property of the UMa X-ray luminosity distribution function.

Einstein

HR HR (Bright Star Catalog) number number=1 These columns give the HR (Bright Star Catalog) and HD (Henry Draper Catalog) numbers of the sample star. --- HD HD (Henry Draper Catalog) number number=1 These columns give the HR (Bright Star Catalog) and HD (Henry Draper Catalog) numbers of the sample star. --- inst Instrument number=2 These columns give the instrument used and the sequence number of the observation. Listed in the instrument column will be an "I" if the Imaging Proportional Counter (IPC) was used, an "H" if the High Resolution Imager (HRI) was used, or an "EXO" if the data is from EXOSAT. The Einstein sequence number is a two to five digit number which uniquely identifies the observation. The numbers were assigned sequentially at the time of proposal submission. In most cases we used IPC data, for a few stars the HRI was used, and in one case the EXOSAT Low Energy experiment was used. --- Seqno Sequence Number number=2 These columns give the instrument used and the sequence number of the observation. Listed in the instrument column will be an "I" if the Imaging Proportional Counter (IPC) was used, an "H" if the High Resolution Imager (HRI) was used, or an "EXO" if the data is from EXOSAT. The Einstein sequence number is a two to five digit number which uniquely identifies the observation. The numbers were assigned sequentially at the time of proposal submission. In most cases we used IPC data, for a few stars the HRI was used, and in one case the EXOSAT Low Energy experiment was used. --- f_CCR Flagged "1" if count rate is an upper limit number=3 The "f_CCR" column is marked with a "1" if the corrected count rate is an upper limit. The "CCR" column gives the corrected count rate (per 1000 seconds). For detections, the "f_CCR" column is marked with a "0", and the 1 sigma error is given in the "e_CCR" column. For upper limits, the value given is a 3 sigma upper limit, and the error is given as zero. Count rate is corrected for scattering, vignetting, and detector dead time. --- CCR Corrected Count Rate number=3 The "f_CCR" column is marked with a "1" if the corrected count rate is an upper limit. The "CCR" column gives the corrected count rate (per 1000 seconds). For detections, the "f_CCR" column is marked with a "0", and the 1 sigma error is given in the "e_CCR" column. For upper limits, the value given is a 3 sigma upper limit, and the error is given as zero. Count rate is corrected for scattering, vignetting, and detector dead time. ct/ks e_CCR Error on count rate number=3 The "f_CCR" column is marked with a "1" if the corrected count rate is an upper limit. The "CCR" column gives the corrected count rate (per 1000 seconds). For detections, the "f_CCR" column is marked with a "0", and the 1 sigma error is given in the "e_CCR" column. For upper limits, the value given is a 3 sigma upper limit, and the error is given as zero. Count rate is corrected for scattering, vignetting, and detector dead time. ct/ks method Detect method number=4 This column marks what kind of detect algorithm was used to locate the source; an "M" indicates MDETECT, an "L" indicates LDETECT (see Harnden, et al. 1984). This pertains only to the IPC data. Sources detected with other detectors contain a "." in this column. --- logLx Log of X-ray luminosity from 0.16-4.0 keV number=5 This column gives the log of the X-ray luminosity (in erg/s) in the 0.16-4.0 keV passband, computed with the distance given in the table st_uma_2.dat . When the count rate is an upper limit, the luminosity is also an upper limit. For the conversion from count rate to fluxes, we used the "standard" conversion of 2x10^-11^ erg/cm^2^/count. [10-7W] note Notes on the source number=6 This column contains notes on individual sources. The following notes are used: a: HR 1971: observed with Ribs and Edges COde (RECO; see text) 1008 b: HR 5328/29: not separated by IPC; observed with RECO 200 c: HR 5727/28: not separated by IPC d: HR 8207: observed with RECO 1006 e: HR 8410: observed with RECO 400 --- RAh Right Ascension (B1950) (hour) h RAm Right Ascension (B1950) (min) min RAs Right Ascension (B1950) (sec) s DE- Declination sign (B1950) --- DEd Declination (B1950) (deg) deg DEm Declination (B1950) (arcmin) arcmin DEs Declination (B1950) (arcsec) arcsec Dist Distance to star number=7 In these columns, we give the adopted distance, the B-V color index, and the spectral type. pc B-V B-V color index number=7 In these columns, we give the adopted distance, the B-V color index, and the spectral type. mag Sp Spectral type number=7 In these columns, we give the adopted distance, the B-V color index, and the spectral type. --- U U velocity number=8 The space velocities, U, V, and W are given (in km/s) in the first three columns listed here. Note that we are using a coordinate system with the positive U-axis pointing toward the Galactic center. In the "Rho" column, we give the modulus of the velocity difference between the star and the cluster nucleus adopted from Eggen (1983AJ.....88..642E) to be U(nuc)= 13.9 km/s, V(nuc)= 1.5 km/s, and W(nuc)= -9.4 km/s. km/s V V velocity number=8 The space velocities, U, V, and W are given (in km/s) in the first three columns listed here. Note that we are using a coordinate system with the positive U-axis pointing toward the Galactic center. In the "Rho" column, we give the modulus of the velocity difference between the star and the cluster nucleus adopted from Eggen (1983AJ.....88..642E) to be U(nuc)= 13.9 km/s, V(nuc)= 1.5 km/s, and W(nuc)= -9.4 km/s. km/s W W velocity number=8 The space velocities, U, V, and W are given (in km/s) in the first three columns listed here. Note that we are using a coordinate system with the positive U-axis pointing toward the Galactic center. In the "Rho" column, we give the modulus of the velocity difference between the star and the cluster nucleus adopted from Eggen (1983AJ.....88..642E) to be U(nuc)= 13.9 km/s, V(nuc)= 1.5 km/s, and W(nuc)= -9.4 km/s. km/s Rho Velocity number=8 The space velocities, U, V, and W are given (in km/s) in the first three columns listed here. Note that we are using a coordinate system with the positive U-axis pointing toward the Galactic center. In the "Rho" column, we give the modulus of the velocity difference between the star and the cluster nucleus adopted from Eggen (1983AJ.....88..642E) to be U(nuc)= 13.9 km/s, V(nuc)= 1.5 km/s, and W(nuc)= -9.4 km/s. km/s HD HD (Henry Draper Catalog) number number=1 The HD (Henry Draper Catalog) number of the sample star is given in this column. --- Seqno Sequence number number=2 This column gives the Einstein sequence number, a two to five digit number which uniquely identifies the observation. Sequence numbers were assigned sequentially at the time of proposal submission. --- ntemps Number of temperature components in fit number=3 This column gives the number of temperature components which were used in the spectral analysis. --- logT1 log T for low-temperature component number=4 These columns give the best-fit single temperature for each component (logT1 and logT2), along with the one sigma (68% confidence) errors. For fits which had only one component, the second component entries will be zero. [K] e_logT1 Downward 68% confidence error number=4 These columns give the best-fit single temperature for each component (logT1 and logT2), along with the one sigma (68% confidence) errors. For fits which had only one component, the second component entries will be zero. [K] E_logT1 Upward 68% confidence error number=4 These columns give the best-fit single temperature for each component (logT1 and logT2), along with the one sigma (68% confidence) errors. For fits which had only one component, the second component entries will be zero. [K] logT2 log T for high-temperature component number=4 These columns give the best-fit single temperature for each component (logT1 and logT2), along with the one sigma (68% confidence) errors. For fits which had only one component, the second component entries will be zero. [K] e_logT2 Downward 68% confidence error number=4 These columns give the best-fit single temperature for each component (logT1 and logT2), along with the one sigma (68% confidence) errors. For fits which had only one component, the second component entries will be zero. [K] E_logT2 Upward 68% confidence error number=4 These columns give the best-fit single temperature for each component (logT1 and logT2), along with the one sigma (68% confidence) errors. For fits which had only one component, the second component entries will be zero. [K] chi2 Reduced chi-square number=5 This column gives the reduced chi-squared of the temperature fit. --- em1d2 Emission measure number=6 These columns give the derived emission measure (in units of 10^49^ cm^-3^ pc^-2^) of the best-fit spectrum. For fits which had only one component, the entry for the second component will be zero. 10+49/cm3/pc2 em2d2 Emission measure number=6 These columns give the derived emission measure (in units of 10^49^ cm^-3^ pc^-2^) of the best-fit spectrum. For fits which had only one component, the entry for the second component will be zero. 10+49/cm3/pc2 logLx1 log X-ray luminosity from 0.16-4.0 keV number=7 These columns give the log of the inferred X-ray luminosity (with the distance as given in st_uma_1.dat) in ergs/s in the 0.16-4.0 keV passband. For fits which had only one component, the entry for the second component will be zero [10-7W] logLx2 log X-ray luminosity from 0.16-4.0 keV number=7 These columns give the log of the inferred X-ray luminosity (with the distance as given in st_uma_1.dat) in ergs/s in the 0.16-4.0 keV passband. For fits which had only one component, the entry for the second component will be zero [10-7W] Patricio Ortiz CDS 1999Apr07 UNKNOWN UNKNOWN Prepared from the tables available at the "ADS Catalogue Service" (CfA, Harvard-Smithsonian Center for Astrophysics, Cambrigde MA) J_ApJ_351_492.xml