ACDS V10.0 - Detailed Description of B/wd

ACDS V10.0 - Wed Jan 29 17:07:36 CET 2025

| # Detailed Description of B/wd : Spectroscopically identified white dwarfs (McCook+, 2014) |

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.

    B/wd          Spectroscopically identified white dwarfs          (McCook+, 2014)
    ================================================================================
    A Catalogue of Spectroscopically Identified White Dwarfs (Version Apr. 2014)
         McCook G.P., Sion E.M.
       <Astrophys. J. Suppl. Ser. 121, 1 (1999)>
       =2016yCat....102035M
       =1999ApJS..121....1M
    ================================================================================
    ADC_Keywords: Stars, white dwarf ; Spectral types ; References

    Keywords: catalogs; white dwarfs

    Description:
        This is an update of the Villanova catalog published in the ApJS
        paper, corresponding to the Web version of the catalog in Apr 2014
        (see http://www.astronomy.villanova.edu/WDCatalog/index.html). The
        introduction to the 1999 catalog is in the file "preface.tex".

        This updated version lists 14294 unique white dwarfs for a total of
        27975 rows (multiple observations).

    File Summary:

           FileName      Lrecl  Records   Explanations

    ×                   80        .   This file
    × ReadMe            80        .   This file
    × preface.tex       97      840   Introduction by G.P. McCook and E.M. Sion
                                      to the 1999 catalog
    × catalog.dat      250    27975   Data for the White Dwarfs
    × names.dat         26    33697   Cross-identifications of White Dwarfs
                                      (from file CrossRef.txt)
    × notes.dat        255     2353   Notes for stars flagged in "catalog.dat"
    × refs.dat         228      815   References mentioned in file "catalog.dat"
                                      (from file RefByRefNumber.txt)

    See also:
     J/MNRAS/455/3413 : New WD and subdwarf stars in SDSS DR12 (Kepler+, 2016)
     J/MNRAS/433/3398 : WD main-sequence binaries (Rebassa-Mansergas+, 2013)
     J/MNRAS/425/1394 : High proper-motion white dwarfs (Kawka+, 2012)
     J/MNRAS/424/1841 : SDSS-UKIDSS white dwarf-main sequence binaries (Liu+, 2012)
     J/MNRAS/417/1210 : DA-white dwarfs from SDSS and UKIDSS (Girven+, 2011)
     J/A+A/536/A43  : SDSS WD main-sequence binaries XII. (Nebot Gomez-Moran+, 2011)
     J/ApJ/723/1072 : The ELM survey. I. Low-mass white dwarfs (Brown+, 2010)
     J/ApJ/714/1037 : White dwarfs from the Kiso survey (Limoges+, 2010)
     J/ApJ/712/585  : Apparent velocity measurements of DA WDs (Falcon+, 2010)
     J/ApJS/190/77  : Detailed analysis of cool WDs in the SDSS (Kilic+, 2010)
     J/MNRAS/402/620  : SDSS WD main-sequence binaries (Rebassa-Mansergas+, 2010)
     J/MNRAS/399/699  : Parameters of atmospheres of white dwarfs (Mortlock+, 2009)
     J/A+A/506/1341 : Magnetic fields in white dwarfs (Kuelebi+, 2009)
     J/A+A/505/441  : UVES/VLT spectra of white dwarfs (Koester+, 2009)
     J/A+A/496/191  : Spectral analysis of 636 SDSS WD-M binaries (Heller+, 2009)
     J/A+A/486/843  : White dwarf-red dwarf binaries in the SDSS (Augusteijn+, 2008)
     J/AJ/135/1239  : Spectral distances to DA white dwarfs (Holberg+, 2008)
     J/AJ/135/1225  : Parameters of the local white dwarfs (Holberg+, 2008)
     J/AJ/134/252   : New nearby white dwarf systems (Subasavage+, 2007)
     J/ApJ/663/1291 : DZ stars in SDSS DR4 (Dufour+, 2007)
     J/ApJ/657/1013 : IR photometry of 2MASS/Spitzer white dwarfs (Tremblay+, 2007)
     J/ApJ/654/499  : H-rich white dwarfs spectropolarimetric survey (Kawka+, 2007)
     J/MNRAS/382/515  : SDSS ultracool and halo WD candidates (Vidrih+, 2007)
     J/ApJS/167/40  : SDSS4 confirmed white dwarfs catalog (Eisenstein+, 2006)
     J/A+A/448/579  : Sample of confirmed WDs in GSC-II survey (Carollo+, 2006)
     J/A+A/447/173  : 3D-kinematics of WDs from SPY project. II. (Pauli+, 2006)
     J/ApJ/652/1554 : Iron in hot DA white dwarfs (Vennes+, 2006)
     J/ApJ/643/402  : Cool white dwarfs in the solar neighborhood (Kawka+, 2006)
     J/AJ/132/676   : SDSS hot DB white dwarfs (Eisenstein+, 2006)
     J/AJ/131/582   : Cool white dwarfs in the SDSS (Kilic+, 2006)
     J/AJ/130/734   : Magnetic WDs from SDSS DR2 and DR3 (Vanlandingham+, 2005)
     J/ApJS/161/394 : Low-luminosity companions to white dwarfs (Farihi+, 2005)
     J/ApJS/156/47  : DA white dwarfs from the Palomar Green Survey (Liebert+, 2005)
     J/ApJ/631/1100 : Atmospheric parameters of DA white dwarfs (Gianninas+, 2005)
     J/AJ/125/2239  : Hard X-ray emission from white dwarfs (O'dwyer+, 2003)
     J/A+A/378/556  : UVES/VLT spectra of white dwarfs (Koester+, 2001)
     J/ApJS/147/145 : IUE low-dispersion spectra of white dwarfs (Holberg+, 2003)
     J/AJ/124/1118  : Radial velocities of high-velocity WDs (Silvestri+, 2002)
     J/ApJ/571/512  : Distances of white dwarf stars (Holberg+, 2002)
     J/MNRAS/335/673  : DA white dwarfs in 2dF QSO Redshift Survey (Vennes+, 2002)
     J/ApJS/133/413 : BVRIJHK photometry of cool white dwarfs (Bergeron+, 2001)
     J/A+A/363/1040 : DB white dwarfs from the Hamburg/ESO survey (Friedrich+, 2000)
     J/ApJS/119/207 : IUE echelle spectra of hot white dwarfs (Holberg+, 1998)
     J/A+A/316/147  : Catalogue of ROSAT White Dwarfs (Fleming+ 1996)
     J/AJ/103/267   : Spectrocopy of hot stars in galactic halo (Beers+ 1992)
     http://www.astronomy.villanova.edu/WDCatalog : The Web WD Catalog home page

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

       Bytes Format  Units   Label   Explanations

           1  A1     ---     New     [N] for a New star
       2- 11  A10    ---     WD      White Dwarf (WD) number (1)
          12  A1     ---     n_WD    [*F] Name originally J-based (7)
      13- 14  I2     h       RAh     ?Hours RA, Equinox=B1950, Epoch=1950.0 (2)
      16- 17  I2     min     RAm     ?Minutes RA, Equinox=B1950, Epoch=1950.0 (2)
      19- 20  I2     s       RAs     [0/60]? Seconds RA (2)
          22  A1     ---     DE-     ?Declination sign (2)
      23- 24  I2     deg     DEd     ?Degrees Dec, Equinox=B1950, Epoch=1950.0 (2)
      26- 29  F4.1   arcmin  DEm     ?Minutes Dec, Equinox=B1950, Epoch=1950.0 (2)
          30  A1     ---     ---     [C] indicates a corrected position
      31- 40  A10    ---     SpT     Spectral type (definitions in the paper,
                                       or in file "preface.tex").
          41  A1     ---     bNote   [*b?] 'b' if white dwarf is member of binary,
                                          '*' indicates a note in file "notes.dat"
          42  A1     ---     ---     [(] Left bracket enclosing the reference
      43- 44  A2     ---     r_SpT   Reference code for spectral type
          45  A1     ---     ---     [)] Right bracket enclosing the reference
          46  A1     ---     M1      [NACU] Modifications of spectral type (6)
      47- 72  A26    ---     Names   Other names for this star, see table Names
      73- 78  F6.3   mag     Vmag    [6.4/24.3]? V or other magnitude (see n_Vmag)
          79  A1     ---     u_Vmag  [:?] Uncertainty flag on Vmag
      80- 81  A2     ---     n_Vmag  [pgBv ] v = multichannel V, pg = photographic,
                                             B = Johnson B
      82- 87  F6.3   mag     B-V     [-0.7/2]? B-V color index in the UBV system
          88  A1     ---     u_B-V   Uncertainty flag (:) on B-V color index
      89- 91  A3     ---     col     Color class from Lowell or Luyten PM surveys
      92- 97  F6.3   mag     U-B     [-9.9/1.4]? U-B color index in the UBV system
          98  A1     ---     u_U-B   Uncertainty flag (:) on U-B color index
          99  A1     ---     ---     [(] Left bracket enclosing the reference
     100-101  A2     ---     r_Vmag  Wide band photometry reference code
         102  A1     ---     ---     [)] Right bracket enclosing the reference
         103  A1     ---     M2      [NACU] Modifications of UBV magnitudes (6)
     104-108  F5.2   mag     Vsphot  [9.5/20.1]? V mag from multichannel
                                       spectrophotometry
     110-114  F5.2   mag     (g-r)   [-1.3/2.8]? g-r color index from
                                       spectrophotometry
         115  A1     ---    u_(g-r)  Uncertainty flag (:) on g-r
         116  A1     ---     ---     [(] Left bracket enclosing the reference
     117-118  A2     ---   r_Vsphot  Multichannel spectrophotometry reference code
         119  A1     ---     ---     [)] Right bracket enclosing the reference
         120  A1     ---     M3      [N] Modifications of Vsphot (6)
     121-126  F6.3   mag     ymag    [9.5/17.3]? y mag from ubvy photoelectric
                                      observations
     127-132  F6.3   mag     b-y     [-0.4/0.8]? b-y color index from uvby
         133  A1     ---     u_b-y   Uncertainty flag (:) on b-y
     134-139  F6.3   mag     u-b     [-0.6/2]? u-b color index from uvby
         140  A1     ---     ---     [(] Left bracket enclosing the reference
     141-142  A2     ---     r_ymag  uvby photoelectric photometry reference code
         143  A1     ---     ---     [)] Right bracket enclosing the reference
         144  A1     ---     M4      [NCU] Modifications of uvby photometry (6)
     146-150  F5.2   mag     AbsMag  [-0.2/18.1]? Absolute visual (or B)
                                       magnitude (3)
         151  A1     ---   f_AbsMag  [:B] uncertainty flag or B AbsMag (3)
     153-155  I3     kK      Teff    [10/170]? Effective temperature
         156  A1     ---     ---     [(] Left bracket enclosing the method
     157-158  A2     ---   n_AbsMag  Method of calculation of AbsMag (5)
         159  A1     ---     ---     [)] Right bracket enclosing the method
         160  A1     ---     M5      [NACabc] Modification of AbsMag (6)
         161  A1     ---     l_pm    [~<] Limit flag on pm
     162-167  F6.4 arcsec/yr pm      [0/7]? Total proper motion
         168  A1     ---     u_pm    [:!0123] Uncertainty flag (:) on pm,
                                       problem on proper motion (!),
                                       or Estimated proper motion (4)
     170-174  F5.1   deg     pmPA    ? Position angle of proper motion vector
         175  A1     ---     ---     [(] Left bracket enclosing the reference
     176-177  A2     ---     r_pm    Proper motion reference code
         178  A1     ---     ---     [)] Right bracket enclosing the reference
         179  A1     ---     M6      [NAC] New line, Additional or Corrected pm
     180-186  F7.2   km/s    RadVel  [-262/422]? Radial velocity
     188-194  F7.3   km/s    Adp-V   [-97.2/134]? Adopted apparent velocity (8)
         195  A1     ---     ---     [(] Left bracket enclosing the reference
     196-197  A2     ---   r_RadVel  Velocity reference
         198  A1     ---     ---     [)] Right bracket enclosing the reference
         199  A1     ---     M7      [NA] Modification of RadVel (6)
     200-206  F7.4   arcsec  Plx     [-0.003/0.6]? Trigonometric parallax
     207-210  F4.1   mas     e_Plx   [0/97]? Reported mean error of parallax
         211  A1     ---     ---     [(] Left bracket enclosing the reference
     212-213  A2     ---     r_Plx   Parallax reference code
         214  A1     ---     ---     [)] Right bracket enclosing the reference
         215  A1     ---     M8      [NACU] Modification of parallax (6)
     217-221  F5.2   mag     gmag    [11.4/29]? SDSS green magnitude
         222  A1     ---     u_gmag  [*:] questionable (*) or uncertain (:) SDSS
                                          photometry
     223-227  F5.2   mag     u-g     [-3.4/8]? SDSS u-g Color Index
     229-233  F5.2   mag     g-r     [-5.3/7]? SDSS g-r Color Index
     235-239  F5.2   mag     r-i     [-7.4/2.4]? SDSS r-i Color Index
     241-245  F5.2   mag     i-z     [-6.3/7.1]? SDSS i-z Color Index
         246  A1     ---     ---     [(] Left bracket enclosing the reference
     247-248  A2     ---     r_gmag  SDSS colors reference
         249  A1     ---     ---     [)] Right bracket enclosing the reference
         250  A1     ---     M9      [N] Modification of SDSS photometry (6)

    Note (1): Stars having identical catalog numbers, whether binary or not,
        are distinguished by using the designations .1 and .2 in
        bytes 10-11.
    Note (2): The positions have quite various precisions; generally speaking
        most of the older stars have 1950 coordinates accurate to the arcmin
        from the references, while newer WDs have 2000 coordinates in the
        reference which were precessed back to 1950 and rounded to a 0.1arcmin
        accuracy. No correction has been made for proper motion.
    Note (3): For DO and DOZ white dwarfs, AbsMag is a directly derivable
        effective temperature value. These are given in units of 103K
        A ':' for uncertain AbsMag may appear also (WD 0736+053);
        the 'B' indicates an absolute B magnitude.
    Note (4): In cases where only an estimated proper motion is reported in
        the Lowell proper-motion surveys, the "pm" field is blank and a
        corresponding code is given there in "Epm" field. These codes are
        defined in Giclas et al. (1967, 1970) and are the following:
        0: Stars of blue color whose motions are too small to definitely
           verify on all plates.
        1:        pm <= 0.1  arcsec/yr
        2: 0.1 <= pm <  0.2  arcsec/yr
        3: 0.2 <= pm <  0.26 arcsec/yr
    Note (5): The codes to indicate the method of calculation of
        the absolute magnitude are:
        1 = trigonometric parallax (>0.1arcsec)
        2 = multichannel spectrophotometric colors
        3 = uvby (Stroemgren) colors
        4 = UBV photometry
        5 = Teff value from Wesemael, Green and Liebert (1993PASP..105..761W),
            Werner and Heber (1992, in "The Atmospheres of Early-Type stars",
            ed. U. Heber & S. Jeffrey, Springer, p. 273) or
            Napiwotzki and Schonberner (1991, in "White Dwarfs", ed.
            G. Vauclair and E.M. Sion, NATO ASI Series, Series C, 336:
            Dordrecht, Kluwer, p. 39)
        6 = Liebert, Dahn and Monet (1988ApJ...332..891L)
        7 = Bergeron, Ruiz and Leggett (1997ApJS..108..339B)
        8 = Liebert et al., (1997, in "White Dwarfs", ed. J.Isern, M. Hernanz &
            Garcia-Berro, Dordrecht: Kluwer, p. 85)
        9 = Smith (1998, Ph.D Thesis, Florida Institute of Technology,
            Melbourne, Fl.)
    Note (6): modifications since the publication:
          N=New, A=Additional, C=Corrected, U=Updated
          Lowercase letters indicate components in the case of degenerate
          systems (1824+040).
    Note (7):
       * = Some recently published new white dwarfs were assigned a name
           based on J2000 position. Such names were transformed into B1950-based
           WD names by applying the appropriate precession.
       F = Finding Chart (T.R.Marsh) available on the online catalog:
           http://www.astronomy.villanova.edu/WDCatalog
    Note (8): The apparent velocity is the sum of the radial velocity
        (Doppler redshift) and the gravitational redshift, which have comparable
        values (see Falcon+, 2010, J/ApJ/712/585).

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

       Bytes Format  Units   Label    Explanations

       1- 14  A14    ---     Name     Common name of the object
      15- 16  A2     ---     ---      [WD] Prefix of catalog
      17- 26  A10    ---     WD       White Dwarf (WD) number

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

       Bytes Format  Units   Label    Explanations

       2-  3  A2     ---     ---      [WD] Prefix of catalog
       4- 13  A10    ---     WD       White Dwarf (WD) number
      16-255  A240   ---     Notes    Text of note for this star

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

       Bytes Format Units   Label     Explanations

       1-  2  A2    ---     RefCode   Reference code
       4- 22  A19   ---     BibCode   CDS/ADS/NED BibCode
      24-228  A205  ---     Text      Text of reference

    History:
      * 13-Oct-2016: Current version (Apr 2014) downloaded from:
        ftp://astro5.ast.villanova.edu/mccook/Current Web Version of WD Catalog/
        (Supersedes Cat. III/235).

    References:
      McCook and Sion  1st Edition  1977VilCo...2....0C
      McCook and Sion               1984VilCo...3....1M
      McCook and Sion               1987ApJS...65..603M   Cat. III/129
      McCook and Sion               1999ApJS..121....1M   Cat. III/210, III/235
    ================================================================================
    (End)             Francois Ochsenbein, Emmanuelle Perret [CDS]       13-Oct-2016