J/A+AS/135/319      ROSAT data of Nearby Stars (Huensch+ 1999)
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The ROSAT all-sky survey catalogue of the nearby stars
       Huensch M., Schmitt H.H.M.M., Sterzik M.F., Voges W.
      
      =1999A&AS..135..319H      (SIMBAD/NED BibCode)
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ADC_Keywords: Stars, late-type ; X-ray sources ; Stars, nearby
Mission_Name: ROSAT
Keywords: stars: activity - stars: coronae - stars: late-type - X-rays: stars

Description:
    We present X-ray data for all entries of the Third Catalogue of Nearby
    Stars (Gliese and Jahreiss, 1991, Cat. ) that have been
    detected as X-ray sources in the ROSAT all-sky survey. The catalogue
    contains 1252 entries yielding an average detection rate of 32.9
    percent. In addition to count rates, source detection parameters,
    hardness ratios, and X-ray fluxes we also list X-ray luminosities
    derived from Hipparcos parallaxes.

File Summary:
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 FileName  Lrecl  Records   Explanations
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ReadMe        80        .   This file
table2.dat   100     1252   RASS detections of the Gliese stars
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See also:
           V/70 : Nearby Stars, Preliminary 3rd Version (Gliese+ 1991)
          IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1996)
 J/A+AS/127/251 : Giants and supergiants ROSAT data (Huensch+ 1998)
 J/A+AS/132/155 : Main-sequence and subgiants ROSAT data (Huensch+ 1998)


Byte-by-byte Description of file: table2.dat
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   Bytes  Format Units       Label     Explanations
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    1- 17  A17   ---         Name      Gliese catalogue or other designation
   19- 23  F5.2  mag         Vmag      V magnitude
   25- 29  F5.2  mag         B-V       ? B-V colour index
   31- 42  A12   ---         SpType    Spectral classification
   43- 47  F5.1  pc          Dist      ? Hipparcos distance
   49- 52  I4    s           ExpTime   Exposure time
   54- 59  F6.3  ct/s        CtRate    Mean PSPC count rate
   61- 65  F5.3  ct/s      e_CtRate    Error of PSPC count rate
   67- 69  I3    ---         LH        Likelihood of existence
   71- 72  I2    arcsec      DO-X      Offset between optical and X-ray position
   74- 78  F5.2  ---         HR        ? Hardness Ratio = (H-S)/(H+S)
       79  A1    ---       u_HR        Uncertainty flag on HR
   80- 83  F4.2  ---       e_HR        ? Error of Hardness Ratio
   85- 91  F7.1  10-14mW/m2  FXray     Apparent X-ray flux (0.1-2.4 keV)
       92  A1    ---       u_FXray     Uncertainty flag on FXray
   93- 99  F7.1  10+20W      LXray     ? X-ray luminosity
      100  A1    ---       u_LXray     Uncertainty flag on LXray
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Acknowledgements: Matthias Huensch 
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(End)                                         Patricia Bauer [CDS]   23-Nov-1998