ACDS V10.0 - Detailed Description of J/A+A/335/467

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| # Detailed Description of J/A+A/335/467 : High galactic latitude RASS X-ray sources (Thomas+ 1998) |

Note : this is the description file of the original catalog. This HTML page corresponds well to the original description, but some minor changes in the format may have been introduced in the FITS output files in order to allow for arithmetic operations on quantities such as coordinates and times. h:m:s and d:m:s units are normally converted into degrees, and YYYY-MM-DD into julian days.
Similarly, some slight changes may have been introduced in the units; the value given in the HTML files supersedes the value indicated in the ReadMe file for this catalogue.

    J/A+A/335/467       High galactic latitude RASS X-ray sources (Thomas+ 1998)
    ================================================================================
    Identification of soft high galactic latitude RASS X-ray sources.
    I. A complete count-rate limited sample.
           Thomas H.-C., Beuermann K., Reinsch K., Schwope A.D., Truemper J.,
           Voges W.
          <Astron. Astrophys. 335, 467 (1998)>
          =1998A&A...335..467T      (SIMBAD/NED BibCode)
    ================================================================================
    ADC_Keywords: X-ray sources ; Cross identifications

    Keywords: X-rays: galaxies - X-rays: stars - galaxies: Seyfert -
              novae, cataclysmic variables - white dwarfs - stars: coronae

    Abstract:
        We present a summary of spectroscopic identifications for a complete
        sample of bright soft high galactic latitude X-ray sources drawn from
        the ROSAT All-Sky Survey which have PSPC count-rates CR>0.5cts/s and
        hardness ratios HR1<0. Of a total of 397 sources, 270 had catalogued
        counterparts although most of these were not previously known as X-ray
        sources; of the remaining 127 sources neither X-ray nor optical
        properties were previously known. Of the whole sample of very soft
        X-ray sources 155 were also discovered by the Wide-Field-Camera on
        board ROSAT. We present spectroscopic identifications of 108 sources
        and other identifications for further 18 sources; 1 source remains
        unidentified so far. In practically all cases a unique optical
        counterpart exists facilitating identification. The largest source
        classes are AGN, magnetic cataclysmic variables, and hot white dwarfs.

    File Summary:

           FileName      Lrecl  Records   Explanations

    ×                   80        .   This file
    × ReadMe            80        .   This file
    × table2.dat        52      270   Summary of the optical identification program
                                      for previously known sources in our sample.
    × table3.dat        97      127   Summary of the optical identification program
                                      for new sources in our sample.
    × notes.dat        145       36   Individual notes

    See also:
                IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1996)
     J/MNRAS/274/1165 : The 2RE Source Catalogue (Pye+ 1995)
     J/MNRAS/274/1194 : Optical Identifications of ROSAT EUV Sources (Mason+ 1995)

    Byte-by-byte Description of file:  table2.dat

       Bytes Format Units   Label     Explanations

       1- 15  A15   ---     1RXS      1RXS designation
          16  A1    ---     n_1RXS    [*] Note on the object (1)
      18- 31  A14   ---     Name      Name of the optical counterpart
      33- 42  A10   ---     SpType    Spectral type of the counterpart
      44- 47  F4.1  arcsec  Sep       Separation between optical and X-ray positions
      49- 51  F3.1  ---     Sep(r90)  Separation between optical and X-ray positions
                                       in units of the 90% confidence radii

    Note (1): 1RXS J035025.0+171455 (V471 Tau): HR1=-0.7, white dwarf companion
               (Werner & Rauch, 1997A&A...324L..25W and references therein)
              1RXS J041521.5-073843 (40 Eri): HR1=-0.3, white dwarf companion
              1RXS J132511.6-110932 (Spica): HR1=-0.9, coronal emission
               (Cassinelli et al., 1994ApJ...421..705C)

    Byte-by-byte Description of file:  table3.dat

       Bytes Format Units     Label    Explanations

       1- 15  A15   ---       1RXS     1RXS designation
      17- 18  I2    h         RAh      ? Optical counterpart right ascension (J2000)
      20- 21  I2    min       RAm      ? Optical counterpart right ascension (J2000)
      23- 26  F4.1  s         RAs      ? Optical counterpart right ascension (J2000)
          28  A1    ---       DE-      Declination sign
      29- 30  I2    deg       DEd      ? Optical counterpart declination (J2000)
      32- 33  I2    arcmin    DEm      ? Optical counterpart declination (J2000)
      35- 36  I2    arcsec    DEs      ? Optical counterpart declination (J2000)
      38- 41  F4.1  arcsec    Sep      ? Separation between optical and X-ray
                                          positions in arcsec
      43- 45  F3.1  ---      Sep(r90)  ? Separation between optical and X-ray
                                          positions in units of the 90% confidence
                                          radii
      47- 50  F4.2  ct/s      CR       RASS BSC PSPC count-rate
      52- 53  I2    10-2ct/s  e_CR     rms uncertainty on CR
      55- 59  F5.2  ---       HR1      Hardness ratio HR1
      61- 62  I2    10-2      e_HR1    rms uncertainty on HR1
      64- 68  A5    ---       Class    Classification of the optical counterpart
      70- 76  A7    ---       Type     Type of the optical counterpart
      78- 82  F5.3  ---       z        ? Redshift if extragalactic
          83  A1    ---       u_z      Uncertainty flag on z
      85- 88  F4.1  mag       Vmag     ? V magnitude
      90- 96  A7    ---       Note     Notes (1)

    Note (1): 1: spectroscopic identification, this work
              2: WFC identification (Pye et al., 1995, Cat. J/MNRAS/274/1165,
                  Mason et al., 1995, Cat. J/MNRAS/274/1194)
              3: Hamburg/RASS identification (Bade et al., 1998A&AS..127..145B)
              4: Grupe et al., 1998A&A...330...25G
              5: inferred identification from the Digitized Sky Survey
                  (see Sect. 3.2)
              6: radio source (see Sect. 3.2)
              7: blank field
              8: Remarks to individual sources in notes.dat file

    Byte-by-byte Description of file:  notes.dat

       Bytes Format Units   Label     Explanations

       1- 16  A16   ---     1RXS      1RXS designation
      18-145  A128  ---     Note      Text of the note

    Acknowledgements: Hans-Christoph Thomas hcthomas@MPA-Garching.MPG.DE

    ================================================================================
    (End)                                          Patricia Bauer [CDS]  27-Nov-1998