J/PASP/109/849            Probing the LHS Catalog        (Gizis+ 1997)
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Probing the LHS Catalog I. New Nearby Stars and the Coolest Subdwarf
     Gizis J.E., Reid, I.N.
    <Publ. Astron. Soc. Pac. 109, 849 (1997)>
    =1997PASP..109..849G
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ADC_Keywords: Stars, nearby ; Stars, M-type ; Spectroscopy ; Space velocities ;
              Stars, distances ; Stars, subdwarf

Description:
    We present moderate resolution spectroscopy of 111 cool dwarf stars to
    supplement the observations we have already presented in the
    Palomar/MSU Nearby-Star Spectroscopic Survey. The sample consists of
    71 suspected nearby stars added to the Preliminary Third Catalog of
    Nearby Stars since 1991 as well as 40 faint red stars selected from
    the LHS catalog. The study was aimed at identifying interesting red
    dwarfs, particularly new nearby, ultracool dwarfs, and very metal-poor
    stars.

    The observations were made using the Palomar 60-inch, the Hale
    200-inch and the Las Campanas 100-inch telescopes between June 1995
    and January 1996. The spectral resolution is approximately 3 Angstroms
    per pixel with wavelength coverage from 6200 to 7500 Angstroms. Table
    2 contains bandstrengths for TiO, CaH, and CaOH indices.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        73       71   Candidate nearby stars: basic data (table 1)
table2.dat        77       71   Candidate nearby stars: bandstrengths (table 2)
table3.dat        56       71   Candidate nearby stars: Space Velocities
table4.dat        58       40   Faint LHS stars


See also:
    I/87 : the LHS Catalogue (Luyten 1979)
    V/70 : CNS3 (Nearby Stars, Preliminary 3rd Version; Gliese+ 1991)
    III/198 : PMSU (Palomar/MSU nearby star spectroscopic survey; Hawley+ 1997)


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

   Bytes Format Units   Label     Explanations

   2- 14  A13   ---     Name     *Star name
      16  A1    ---     Bin      *[ps] Primary or secondary binary comp.
      18  A1    ---     Note1    *[bcde] Individual Note
  20- 21  I2    h       RAh       Right ascension, 2000
  23- 24  I2    min     RAm       Right ascension, 2000
  26- 29  F4.1  s       RAs       Right ascension, 2000
      31  A1    ---     DE-       Declination sign
  32- 33  I2    deg     DEd       Declination, 2000
  35- 36  I2    arcmin  DEm       Declination, 2000
  38- 39  I2    arcsec  DEs       Declination, 2000
      41  I1    ---     Src      *[5] Source of positional data
  43- 47  F5.2  mag     MV        Absolute V magnitude
  49- 52  F4.1  pc      r        *Distance
  54- 55  I2    %       er        Distance uncertainty
  57- 58  I2    %       wPi      *? Weight for trigonometric parallax
  60- 62  I3    %       wSp       ? Weight for spectroscopic parallax
  64- 67  A4    ---     SpType    Spectral type
  69- 73  F5.2  mag     Vmag      Apparent V magnitude

Note on Name:
   Gl  - Gliese (1969, Veroff. Astr. Rechen-Instituts, Heidelberg, Nr. 22)
   GJ  - Gliese & Jahreiss                                =1979A&AS...38..423G
   Wo  - Woolley et al (1970, R. Obs. Ann., No. 5)        =Cat. V/32
   LHS - Luyten Half-Second Catalogue                     =Cat. I/87
   LTT - Luyten Two-Tenths Catalogue
   LP  - Luyten Palomar proper-motion catalogue
   G   - Giclas et al (1971, Lowell Proper Motion Survey) =Cat. I/79
   Steph - Stephenson (1986, AJ, 91, 137)                 =Cat. III/123
        (Nomenclature note: should be named "StKM")
Note on Bin:
   Components in a binary system are identified as
      p (primary) or s (secondary, tertiary).
Note on Note1:
   b  G 035-027 and LP 469-118: Photometry based upon Fleming
      et al. (1988) observed V_{system} = 14.20 and assumed
      Delta V = 0.42
   c  Steph 2.908: This is the 809th star in Stephenson (1986).
      Photometry is from Weis (1991).
   d  BD+28 3698: Jahreiss notes that this object is presumably a dK
      binary with Delta m = 0.8, see Heintz (1993).  The distance
      was estimated by Jahreiss.
   e  LHS 3705: This is also Cou 2234.  Estimated distance assumes
      the system is a binary with Delta m = 0.0 as determined by
      Couteau (1985).
Note on Src:
   Source of positional data:

      5-  Digital Sky Survey
          Codes 1-4 were used in Reid et al. (1995),Hawley et al. (1996),
          Hawley+ (1997)
Note on r:
   Distance and estimated uncertainty (%) from the authors' data,
   using a weighted combination of trigonometric and spectroscopic
   parallaxes.
Note on wPi:
   An entry of -1 indicates that Jahreiss's distance estimates were adopted.


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

   Bytes Format Units   Label     Explanations

   3- 15  A13   ---     Name      Star name
  19- 23  F5.3  ---     TiO1      TiO1 index: F(6718-6723)/F(6703-6708)
  25- 29  F5.3  ---     TiO2      TiO2 index: F(7058-7061)/F(7043-7046)
  31- 35  F5.3  ---     TiO3      TiO3 index: F(7092-7097)/F(7079-7084)
  37- 41  F5.3  ---     TiO4      TiO4 index: F(7130-7135)/F(7115-7120)
  43- 47  F5.3  ---     TiO5      TiO5 index: F(7126-7135)/F(7042-7046)
  49- 53  F5.3  ---     CaH1      CaH1 index: F(6380-6390)/F
                              (6345-6355,6410-6420))
  55- 59  F5.3  ---     CaH2      CaH2 index: F(6814-6846)/F(7042-7046)
  61- 65  F5.3  ---     CaH3      CaH3 index: F(6960-6990)/F(7042-7046)
  67- 71  F5.3  ---     CaOH      ? CaOH index: F(6230-6240)/F(6345-6354)
  73- 77  F5.2  0.1nm   Halpha    ? H-alpha Eq. Width


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

   Bytes Format Units      Label   Explanations

   2- 14  A13   ---        Name    Star name
  16- 22  F7.4  arcsec/yr  pmRA    Proper motion in right ascension,
                                    from CNS3
  24- 30  F7.4  arcsec/yr  pmDE    Proper motion in declination, from CNS3
  32- 37  F6.1  km/s       RV      Radial velocity
  39- 41  I3    km/s       U       U space velocity
  43- 46  I4    km/s       V       V space velocity
  48- 50  I3    km/s       W       W space velocity
  52- 56  F5.2  mag        MV      Absolute V magnitude (from table1.dat)


Byte-by-byte Description of file: table4.dat

   Bytes Format Units   Label     Explanations

   2-  9  A8    ---     Name     *Star name
      12  A1    ---     Note1    *[a] Individual Note
  14- 17  F4.1  ---     mr        r magnitude from Luyten (1979)
  19- 23  F5.3  ---     TiO5      TiO5 index: F(7126-7135)/F(7042-7046)
  25- 29  F5.3  ---     CaH1      CaH1 index: F(6380-6390)/F
                                   (6345-6355,6410-6420))
  31- 35  F5.3  ---     CaH2      CaH2 index: F(6814-6846)/F(7042-7046)
  37- 41  F5.3  ---     CaH3      CaH3 index: F(6960-6990)/F(7042-7046)
  43- 45  F3.1  0.1nm   Halpha    ? H alpha Equivalent Width
  47- 53  A7    ---     SpType    Spectral Type
  55- 58  I4    km/s    RV        ? Radial Velocity

Note on Name:
   LHS - Luyten Half-Second Catalogue                    =Cat. I/87
Note on Note1:
   a  Probably misidentified.

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(End)                                     John Gizis [U.Mass]        14-Nov-1997