ACDS V10.0 - Detailed Description of III/147

ACDS V10.0 - Sun Jan 19 18:55:24 CET 2025

| # Detailed Description of III/147 : Studies of LMC stellar content (Rousseau+ 1978) |

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.

    III/147             Studies of LMC stellar content           (Rousseau+ 1978)
    ================================================================================
    Studies of the Large Magellanic Cloud stellar content. III.
    Spectral types and V magnitudes of 1822 members
         Rousseau J., Martin N., Prevot L., Rebeirot E., Robin A., Brunet J.P.
        <Astron. Astrophys. Suppl. Ser. 31, 243 (1978)>
        =1978A&AS...31..243R
    ================================================================================
    ADC_Keywords: Magellanic Clouds ; MK spectral classification ; Photometry, UBV

    Description:
        This is an updated version of the original catalogue. New UBV
        photoelectric measurements were added from Isserstedt (1979, 1982),
        and Feitzinger and Isserstedt (1983). The remarks and origins of
        photoelectric photoelectric magnitudes are not included in this
        electronic version.

        Photoelectric data are obtained by averaging observational values made
        at 100 and more cm instruments (with weight=2) with ones made at 60
        and less cm instruments (with weight=1).

    Abstract:
        A spectral survey has been made during the period 1971 to 1975 with
        the ESO 40cm astrograph at La Silla, equipped with its normal prism,
        giving an intermediate dispersion of 95Angstroem/mm at 4026Angstroem.
        Long exposure plates taken directly or with an interference filter
        enabled us to obtain spectral types for nearly 1600 stars. In
        parallel, a V photographic survey has been carried out during the same
        period with the same astrograph and has led to the determination of V
        magnitudes for more that 700 stars having no previous photometric data.
        New spectroscopic and photometric results as well as previous
        photoelectric UBV values are given in the catalogue together with
        additional remarks concerning peculiarities of spectra, V magnitudes,
        and details on double and multiple systems.

    File Summary:

           FileName      Lrecl  Records   Explanations

    ×                   80        .   This file
    × ReadMe            80        .   This file
    × catalog.dat       78     1827   The catalogue

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

       Bytes Format  Units   Label    Explanations

       1- 11  A11    ---     Name     Star identification (1)
      13- 15  A3     ---     Bchart   Number of B chart Hodge and Wright (1967) (2)
      16- 17  I2     h       RAh      Right Ascension 1975 (hours)
      19- 22  F4.1   min     RAm      Right Ascension 1975 (minutes)
          25  A1     ---     DE-      Declination 1975 (sign)
      26- 27  I2     deg     DEd      Declination 1975 (degrees)
      29- 30  I2     arcmin  DEm      [0/60] Declination 1975 (minutes)
      32- 38  A7     ---     SpType   Spectral type (3)
      39- 43  A5     ---    r_SpType  Origin of the spectral type (4)
      45- 49  F5.2   mag     Vmag     ? V photoelectric magnitude
          50  A1     ---     u_Vmag   Uncertainty flag (:) on Vmag
      52- 56  F5.2   mag     B-V      ? photoelectric colour index
          57  A1     ---     u_B-V    Uncertainty flag (:) on B-V
      59- 63  F5.2   mag     U-B      ? photoelectric colour index
          64  A1     ---     u_U-B    Uncertainty flag (:) on U-B
      66- 67  I2     ---     Obs      [1/16]? Number of photoelectric measurements
      71- 75  F5.2   mag     Pmag     ? V photographic magnitude (5)
          76  A1     ---     u_Pmag   Uncertainty flag (:) on Pmag (5)
      77- 78  I2     ---     o_Pmag   [1/6]? Number of plates used for Pmag

    Note (1): number of the star in the following catalogues and lists:
         BI = Brunet et al. (1975A&AS...21..109B)
          C = Ardeberg et al. (1972A&AS....6..249A), <ARDB NNN> in Simbad;
              Brunet et al. (1973A&AS....9..447B)
          D = Dachs (1972A&A....18..271D), <Dachs LMC N-NN> in Simbad
        FDA = Fehrenbach et al. (1976A&AS...24..379F), <FD NN> in Simbad.
        FDS = Fehrenbach and Duflot (1970), A&A Special Suppl. no. 1, list S,
              <[FD70] SNNN> in Simbad;
          G = Fehrenbach and Duflot (1970), A&A Special Suppl. no. 1, list G,
              <GV NNN> in Simbad;
              Fehrenbach and Duflot (1973A&AS...10..231F), <GV NNNN> in Simbad.
         HS = Henize (1956ApJS....2..315H), <LHA 115-S NNN> in Simbad.
         NS = Sanduleak (1969), Contr. Cerro Tololo Int. Am. Obs. 89 (Cat. III/113),
              <Sk -DD NNNA> in Simbad.
         OM = Martin and Rebeirot (1972A&A....21..329M), <[MR72] NN> in Simbad
          R = Feast et al. (1960MNRAS.121..337F), <RMC NNN> in Simbad.
    Note (2): Hodge, P.W. and Wright, F.W.: 1967, The Large Magellanic Cloud,
              Smithsonian Publication 4699, Smithsonian Press, Washington.
    Note (3): spectral MK classification, with the terminology used by
              Feast et al., Ardeberg et al., and Brunet et al.; 22 non stellar
              objects have been classified with the usual terminology:
        CLUS = for clusters
         HII = HII regions
          PN = planetary nebulae
    Note (4): origin of the adopted spectral type:
          A = Ardeberg et al. (1972A&AS....6..249A)
              Brunet et al. (1973A&AS....9..447B)
          C = Classifications determined from spectra obtained at the
              Chalonge-Divan spectrograph and published by
              Brunet et al. (1975A&AS...21..109B)
          F = Fehrenbach et al. (1976A&AS...24..379F) for the WR stars
          P = New spectral types determined from objective prism spectra,
              with or without interference filter.
          R = Feast et al. (1960MNRAS.121..337F)
          S = Sanduleak (1970CoTol..89....1S), Contr. Cerro Tololo Int. Am. Obs. 89;
              Sanduleak (1972A&A....17..326S)
    Note (5): V photographic magnitude as determined from astrographic plates.
        A value with two decimals means a standard error less than 0.07 mag; a
        value with one decimal only means a standard error less than 0.15 mag;
        a value with one decimal and a colon means a standard error higher
        than 0.15 mag or one determination of low quality.

    References:
      Feitzinger, J.V., Isserstedt, J.: 1983, A&AS 51, 505
      Isserstedt, J.: 1979, A&AS 38, 239
      Isserstedt, J.: 1982, A&AS 50, 7

    Historical Notes:
      * 29-May-1989: this version which supersedes III/111 was provided by
        L. Prevot (Marseille Observatory). Compared to the original edition,
        UBV photoelectric data and number of measurements were recomputed.
      * 01-Sep-1995 (CDS): a few misaligned decimal points and uncertainty
        colons corrected in the catalog file. Documentation was standardized.
      * 04-Apr-2016: added bibcodes in this "ReadMe" file;
        the postiion and a Simbad name are added in the file "catalog.pos"================================================================================
    (End)                                     Francois Ochsenbein [CDS]  01-Sep-1995
    ================================================================================
    (End)                                     Francois Ochsenbein [CDS]  01-Sep-1995