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J/AJ/109/1379                   Praesepe & M 67 spectral standards (Allen+ 1995)
Moderate-resolution spectral standards from 560 to 900 nm
     Allen L.E., Strom K.M.
    <Astron. J. 109, 1379 (1995)>
    =1995AJ....109.1379A      (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; MK spectral classification ; Photometry


Description:
    We present a grid of stellar classification spectra of moderate
    resolution (R∼1500) in the range lambda lambda 5600-9000A, compiled
    from high signal-to-noise spectra of 275 stars, most in the open
    clusters Praesepe and M 67. The grid covers dwarfs from types B8
    through M5, giants from G8 through M7, and subgiants from F5 through
    K0. We catalog atomic and molecular absorption features useful for
    stellar classification, and demonstrate the use of
    luminosity-sensitive features to distinguish between late-type dwarf
    and giant stars.
Objects:
    ----------------------------------------------------------
        RA  (2000)  DE    Designation(s)
    ----------------------------------------------------------
      08 50.4    +11 49   M 67 = NGC 2682
      08 40.4    +19 40   M 44 = Praesepe = NGC 2632
    ----------------------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1            90      106   Spectral standards in Praesepe
table2            90      147   Spectral standards in M 67
table3            40       16   Additional giants
table4           118       25   Spectral features


Byte-by-byte Description of file: table1 table2

   Bytes Format Units   Label     Explanations

   1-  4  I4    ---     ID        Identification number (1)
       5  A1    ---     n_ID      [*] * when spectrum plotted (2)
       7  I1    h       RAh       Right ascension (1950)
   9- 10  I2    min     RAm       Right ascension (1950)
  12- 15  F4.1  s       RAs       Right ascension (1950)
  17- 18  I2    deg     DEd       Declination (1950)
  20- 21  I2    arcmin  DEm       Declination (1950)
  23- 24  I2    arcsec  DEs       Declination (1950)
  26- 31  A6    ---     Sp        Adopted spectral type
  33- 38  F6.3  mag     Vmag      V magnitude
  40- 45  F6.3  mag     B-V       ? B-V color index
  47- 51  F5.3  mag     V-I       ? V-I color index
  53- 54  I2    %       Prob      Probability of membership (3)
      56  I1    ---     r_Vmag    [0/2] BVI photometry reference (4)
  58- 90  A33   ---     Notes     Notes (5)

Note (1): In table1, ID from Jones and Stauffer (1991AJ....102.1080J)
          In table2, ID from Sanders (1977A&AS...27...89S)
Note (2): *: spectrum plotted in Figure 3 for table1, in Figure 5 for table2.

Note (3): In table1, Prob from Jones and Stauffer (1991AJ....102.1080J)
          In table2, Prob from Girard et al. (1989AJ.....98..227G)
Note (4): 0: BVI photometry from Jones and Stauffer (1991AJ....102.1080J)
          1: BV photometry from Girard et al. (1989AJ.....98..227G)
          2: BVI photometry from Montgomery et al. (1993) J/AJ/106/181
Note (5): In table1:
            Ab = Abt (1986PASP...98..307A)
            Ba = Barbier (1963POHP....6...36B)
            BB = Boesgaard and Budge (1988ApJ...332..410B)
            Bi = Bidelman (1956PASP...68..318B)
            Bo = Bolte (1991ApJ...376..514B)
            CB = Crawford and Barnes (1969AJ.....74..818C)
          CGal = Corbally and Garrison (1986AJ.....92...90C)
           CGb = Corbally and Garrison (1983JRASC..77...28C)
            Jo = Johnson (1952ApJ...116..640J)
            Po = Popper (1948ApJ...108..490P)
            Re = Rebeirot (1966POHP....8...24R)
            RS = Randich and Schmitt (1994) Cat. J/A+A/298/115
            SS = Soderblom and Stauffer (1984AJ.....89.1543S)
            St = Stauffer (1982PASP...94..678S)
            Up = Upgren et al. (1979AJ.....84.1586U)
            Wi = Wilson (1963ApJ...138..832W)
          In table2:
            Identification cross references:
                     F: Fagerholm ID (1906ArMAF...2s...1F)
                   RGO: Royal Greenwich Observatory ID
                     S: Sandage ID
            Previously published spectral types from:
                    BB: Burbidge and Burbidge (1959ApJ...129..513B)
                    Pe: Pesch (1967ApJ...148..781P)
                    Po: Popper (1954AJ.....59..445P)


Byte-by-byte Description of file: table3

   Bytes Format Units   Label     Explanations

   1-  9  A9    ---     Name      Star name
      10  A1    ---     n_Name    [*] * when spectrum plotted in Figure 3
  12- 13  I2    h       RAh       Right ascension (1950)
  15- 16  I2    min     RAm       Right ascension (1950)
  18- 21  F4.1  s       RAs       Right ascension (1950)
      23  A1    ---     DE-       Declination sign
  24- 25  I2    deg     DEd       Declination (1950)
  27- 28  I2    arcmin  DEm       Declination (1950)
  30- 31  I2    arcsec  DEs       Declination (1950)
  33- 40  A8    ---     Sp        Spectral type


Byte-by-byte Description of file: table4

   Bytes Format Units   Label     Explanations

   1-  4  I4    0.1nm   Lambda    Wavelength
       5  A1    ---     n_Lambda  [-,] Separator, '-' for interval
   6-  9  I4    0.1nm   Lambda2   ? Second wavelength
      10  A1    ---    n_Lambda2  [,] Separator
  11- 14  I4    0.1nm   Lambda3   ? Third wavelength
  16- 30  A15   ---     Ident     Identification
  32-114  A83   ---     Notes     Notes
 116-118  A3    ---     Ref       References (1)

Note (1): 1: Torre-Dodgen & Weaver (1993)  III/181
          2: Kirkpatrick et al. (1991ApJS...77..417K)


History: Prepared via OCR at CDS.


References:
   Torre-Dodgen & Weaver, Cat. III/181   =1993PASP..105..693T
(End)                           James Marcout, Patricia Bauer [CDS]  01-Oct-1996