ACDS V10.0 - Detailed Description of J/MNRAS/274/1194

ACDS V10.0 - Sun Jan 19 02:14:55 CET 2025

| # Detailed Description of J/MNRAS/274/1194 : Optical Identifications of ROSAT EUV Sources (Mason+ 1995) |

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/MNRAS/274/1194    Optical Identifications of ROSAT EUV Sources (Mason+ 1995)
    ================================================================================
    Optical identification of EUV sources from the ROSAT Wide Field
    Camera all-sky survey.
         Mason K.O., Hassall B.J.M., Bromage G.E., Buckley D.A.H., Naylor T.,
         O'Donoghue D., Watson M.G., Bertram D., Branduardi-Raymont G.,
         Charles P.A., Cooke B., Elliott K.H., Hawkins M.R.S., Hodgkin S.T.,
         Jewell S.J., Jomaron C.M., Sekiguchi K., Kellett B.J., Lawrence A.,
         McHardy I., Mittaz J.P.D., Pike C.D., Ponman T.J., Schmitt J.,
         Voges W., Wargau W., Wonnacott D.
        <Mon. Not. R. Astron. Soc. 274, 1194 (1995)>
        =1995MNRAS.274.1194M        (SIMBAD/NED BibCode)
    ================================================================================
    ADC_Keywords: X-ray sources ; Extreme UV sources

    Mission_Name: ROSAT

    Keywords: catalogues - star: activity - binaries: general -
              novae, cataclysmic variables - white dwarfs - galaxies: active

    Description:
        Optical identifications for 195 EUV sources located in the ROSAT Wide
        Field Camera all-Sky survey are presented. We list 69 previous unknown
        EUV-emitting white dwarfs, 114 active stars, 7 new magnetic
        cataclysmic variables and 5 active galaxies. Several of the white
        dwarfs have resolved M-type companions, while five are unresolved
        white dwarf/M-star pairs. Finding charts are given for the optical
        counterparts.

    File Summary:

           FileName      Lrecl  Records   Explanations

    ×                   80        .   This file
    × ReadMe            80        .   This file
    × appena.txt        80      165   Notes on identified sources
    × appenb.txt        80       86   Notes on failed identifications
    × table1.dat       168      209   WFC optical identification programme ID summary
    × table1.tex       110     1013   TeX version of table1

    See also:
        J/MNRAS/260/77   : ROSAT Wide Field Camera EUV Bright Sources (Pounds+ 1993)
        J/MNRAS/274/1165 : The 2RE Source Catalogue (Pye+ 1995)

    Byte-by-byte Description of file:  table1.dat

       Bytes Format Units   Label     Explanations

       1- 18  A18   ---     Name      Source name
          20  A1    ---     l_S1      Limit flag on S1
      21- 26  F6.1  ct/ks   S1        ? WFC survey filter S1 (60-140A) counts
          28  A1    ---     l_S2      Limit flag on S2
      29- 34  F6.1  ct/ks   S2        ? WFC survey filter S2 (110-200A) counts
      36- 40  F5.1 10+20cm-2 NH       ? Galactic Hydrogen column density
      42- 43  I2    h       RAh       Right ascension J2000
      45- 46  I2    min     RAm       Right ascension J2000
      48- 52  F5.2  s       RAs       Right ascension J2000
          55  A1    ---     DE-       Declination sign
      56- 57  I2    deg     DEd       Declination J2000
      59- 60  I2    arcmin  DEm       Declination J2000
      62- 65  F4.1  arcsec  DEs       Declination J2000
          66  A1    ---     n_DEs     [g:] A 'g' indicates that the data are from
                                      the Hubble Space Telescope Guide Star Catalog
      69- 73  F5.2  mag     Vmag      ? V magnitude of the optical counterpart
          74  A1    ---     n_Vmag2   [-] '-' when interval
      75- 76  I2    mag     Vmag2     ? Upper limit of Vmag when n_Vmag2='-'
          77  A1    ---     u_Vmag    Uncertainty flag on Vmag
      78- 82  A5    ---     n_Vmag    Note on Vmag (1)
      85- 88  F4.1  mag     B-V       ? B-V color index of the optical counterpart
      90- 97  A8    ---     SpType    Spectral type of the optical counterpart
         100  A1    ---     l_alpha   Limit flag on alpha
     101-105  F5.2  ---     alpha     ? Source apparent EUV to optical flux ratio
     108-111  A4    ---     Class     Identification class (2)
     113-118  F6.2  0.1nm   EWCa      ? Equivalent width of the Ca H 3933A
                                        chromospheric emission line (for stars only)
         119  A1    ---     n_EWCa    [u-] Note on EWCa (3)
         120  A1    ---     ---       [/] Separator
     121-124  F4.1  0.1nm   EWHa      ? Equivalent width of the Halpha line
                                        (for stars only)
         125  A1    ---     n_EWHa    [?u-] Note on EWHa (3)
     126-128  F3.1 10+3km/s FWHb      ? Full width at half maximum of the Hbeta line
         129  A1    ---     ---       [/] Separator
     130-133  F4.1  0.1nm   EWHb      ? Equivalent width of the Hbeta line
         134  A1    ---     u_EWHb    Uncertainty flag on EWHb
         136  A1    ---     X         [y] y: there is an X-ray telescope position
                                            available for the source
         137  A1    ---     Note      [+] +: additional information in appena file
     139-168  A30   ---     Com       Comments

    Note (1): the note has the following meaning:
          P = CCD or photoelectric photometry (Buckley, private communication;
              Schwartz et al. 1995PASP..107..667S)
          G = The HST Guide Star Catalog (v1.1, Cat. I/220)
        cat = catalogued magnitudes (see Pye et al., 1995, Cat. J/MNRAS/274/1165)
          E = POSS E digitized plate material
          J = SERC J digitized plate material
          S = uncorrected slit magnitudes taken from calibrated spectra
         A 'c' appended to the J and E codes indicates that accurate external
         zero-points were not been obtained by comparing the magnitudes of
         stars within 3arcmin of the EUV source that appear in the HST Guide
         Star Catalog (v.1.1) with the uncorrected values measured for those
         stars from the Schmidt-telescope Sky Survey Plates. If there is more
         than one counterpart, there are separate entries for each star when
         these are available.
    Note (2): the class is as follows:
       Star = all active stars
         WD = white dwarf
         CV = cataclysmic variable
        AGN = active galaxy
    Note (3):
         'u' indicates that the line was covered but no measurable emission
         component was detected. Significant chromospheric emission may still
         be present, particularly when this refers to Halpha (e.g. the Halpha
         photospheric absorption line may be 'filled-in' by emission);
         '-' indicates that the line was not covered in the spectra

    Courtesy: K.O Mason kom@mssl.ucl.ac.uk

    History:
      * 23-Aug-1996: original version
      * 13-Feb-1998: in table1, 2RE J033711+255926 was identified to
                     HD 224030 instead of HD 22403.
    ================================================================================
    (End)                                          Patricia Bauer [CDS]  23-Aug-1996