Individual files can be fetched (via http) from here
or via ftp from: ftp://cdsarc.u-strasbg.fr/pub/cats/III/92

The catalogue can be queried from: http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=III/92

This standardized document follows the rules of the Standard Description for Astronomical Catalogues. For those having to work on this catalogue using FORTRAN programs, this ReadMe file can be transformed into a f77-compliant program which reads the files making up this catalogue, in two versions: either a f77 program loading whole files into arrays, or a f77-program reading each data file line by line.

III/92      A Library of Stellar Spectra (Jacoby+ 1984)
================================================================================
A Library of Stellar Spectra
    Jacoby G.H., Hunter D.A., Christian C.A.
    <Astrophys. J. Suppl. Ser., 56, 257 (1984)>
    =1984ApJS...56..257J
================================================================================
ADC_Keywords: Spectrophotometry


Description:
    The machine-readable version of the library contains digital spectra
    of 161 stars of spectral types O through M and luminosity classes I,
    III, and V. Most stars are of solar metallicity, although two were
    chosen specifically for low metallicity. The data were obtained with
    the Intensified Reticon Scanner on the #1 91-cm telescope at Kitt Peak
    National Observatory. The scans cover the wavelength range 3510-7427
    angstroms, with a resolution of approximately 4.5 angstroms, while the
    typical photometric uncertainty of each resolution element is about 1
    percent and broadband variations are < 3 percent.

File Summary:

       FileName      Lrecl  Records   Explanations

× ReadMe            80        .   This file
× stars.dat         94      161   Information on each star
× fluxes.dat        80    64400   The Library of Stellar Spectra, flux data


See also:
   III/83 : IUE Low-Dispersion Reference Atlas I, Normal Stars (Heck+ 1984)
   III/88 : Stellar Spectrophotometric Atlas (Gunn+ 1983)
  III/124 : Spectrophotometry of 60 stars (Kiehling, 1987)
  III/166 : A New Library of Optical Spectra (Silva+ 1992)
  III/196 : Near-IR stellar spectra from 1.428 to 2.5 um (Lancon+ 1996)
    VI/50 : Intensity Distribution of Normal Stars  (Sviderskiene, 1988)
  J/PASP/110/863 : A Stellar Spectral Flux Library 1150-25000Å (Pickles 1998)


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

   Bytes Format  Units   Label    Explanations

   1- 10  A10    ---     Name    *Star identification (HD, BD, SAO, misc.)
  11- 14  A4     ---     Sp       Adopted spectral type.
  15- 17  A3     ---     Lum      Adopted luminosity class
  19- 20  A2     ---     Sp1      Spectral type from lit. if different
  22- 24  A3     ---     Lum1     Luminosity class from lit. if different
  26- 29  F4.2   mag     E(B-V)  *Derived color excess E(B-V)
  31- 34  F4.2   mag     (U-B)s   U-B color synthesized from the spectrum.
  36- 39  F4.2   mag     (B-V)s   B-V color synthesized from the spectrum.
  41- 45  F5.2   mag     (U-B)0   Dereddened color derived from (U-B)s
  47- 50  F4.2   ---     (B-V)0   Dereddened color derived from (B-V)s
  52- 55  F4.2   mag     U-B      ? U-B color taken from the literature.
  57- 60  F4.2   mag     B-V      ? B-V color taken from the literature.
  62- 68  F7.2   0.1nm   lambda1  [3510] Wavelength of first pixel
  70- 73  F4.2   0.1nm   Dlambda  [1.40] Wavelength increment per pixel
  75- 76  I2     h       RAh     *?Right Ascension J2000 (hours)
  78- 79  I2     min     RAm     *?Right Ascension J2000 (minutes)
  81- 84  F4.1   s       RAs     *?Right Ascension J2000 (seconds)
      86  A1     ---     DE-     *?Declination J2000 (sign)
  87- 88  I2     deg     DEd     *?Declination J2000 (degrees)
  90- 91  I2     arcmin  DEm     *?Declination J2000 (minutes)
  93- 94  I2     arcsec  DEs     *?Declination J2000 (seconds)

Note on E(B-V):
   Derived color excess, E(B-V), used to to deredden the spectrum.
Note on Name, RAh, RAm, RAs, DE-, DEd, DEm, DEs:
   Positions with variable precision derived from SIMBAD.
   The following four stars could not be identified,
   and have the RA and Dec columns blank:
   TR A 14   (G4 V star)
   HD 249240 (G7 III star), the HD classifies this star as A2.
             The star could be HD 24924 (K0 star, Vmag=9.39, at
             03 57 35.5 -01 58 30 (2000)).
   LSIV P 24 (B9 I)
   42 LSI    (A2 I)


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

   Bytes Format   Units    Label    Explanations

   1- 10  A10     ---      ID       Star identification from headers.dat
  11- 80 7E10.3 10mW/m2/nm F(i)    *? Flux values F(i) in erg/cm2/s/Angstrom

Note on F(i):
   Flux values F(i) in erg/cm2/s/Angstrom at wavelengths:
     lambda(i) = lambda1 + (i-1+[7*(L-1)])*Dlambda
     where L is the number of the line for the star of interest. There are
     400 lines of fluxes for each star.  Hence, L is the line number in the
     file, modulo 400.

     In the final record for each star, the seventh flux on the record
     appears blank.


History:
  * 24-May-1993 [CDS]
    The original data pertaining to each star were contained in a group
    of 352 data records. The first two (header) records contained general
    information about the star, such as identification, spectral type, UBV
    colors and reddening, intrinsic UBV colors, and wavelength
    information. Records 3-352 contained 2799 flux values in groups of
    eight fluxes per record. The original file can easily be rebuilt by
    splitting each record in 352 80-bytes records; this split is
    straightforward on Unix workstations with the "fold" command.

  * 23-Aug-1996 Julie Anne Watko [SSDOO/ADC]
    The previous version of this catalog contained all data for each star
    on a single record. To provide a more useful lrecl, the long records
    were folded into 70-byte records using the Unix fold command. J.A.
    Watko [ADC] used IDL to insert star identification into the first 10
    bytes of each record and to create a separate file of header data.

  * 06-Oct-1998 [CDS]
    Positions of the stars were added when possible --- four stars could
    not be recognized.

Acknowledgement:
    Documentation for the original version was written by Wayne H. Warren,
    Jr. [NSSDC/WDC-A-R&S] November 1984. This ReadMe file is a revision of
    Dr. Warren's original document and an Intro document [CDS] 24-May-1993
    to the current CDS standard.

References:
   Jacoby G.H., Hunter D.A. and Christian C.A. 1984, A Library of Stellar
     Spectra, Astrophys. J. Suppl. Ser. 56, 278. (1984ApJS...56..257J)
================================================================================
(End)       Julie Anne Watko [SSDOO/ADC], Francois Ochsenbein [CDS]  06-Oct-1998