III/179 Southern MK Standards 5800-10200A (Danks+ 1994)
An Atlas of Southern MK Standards from 5800 to 10,200 Angstroms
Danks A.C., Dennefeld M.
<Pub. Astron. Soc. Pac. 106, 382 (1994)>
=1994PASP..106..382D 1994PASP..106..382D
ADC_Keywords: Stars, standard; Spectra, red
Description:
Spectra are presented for MK standards in the wavelength range
580-1020nm. The stars cover the normal spectral types O to M and
luminosity types I, III, and V. In addition, a small number of
peculiar stars are included. The data are in 137 FITS files, in
the "fits" subdirectory.
The list of the 137 stars is included in the "stars.dat" file;
note that the list is not identical to the stars listed in Table1
of the paper.
Introduction:
The projected slit width along the dispersion was about 4Å,
slightly less than 2 pixels. The data are corrected for atmospheric
extinction. The fluxes are relative; to convert to "absolute" the
values should be multiplied by 10-13erg/cm2/s/Å (10-15W/m2/nm)
but because not all of the flux was collected by the slit, these
values will be about 15% low with the factor depending on the seeing.
Some features in the spectrum have been introduced by the
instrumentation. The most notable feature is a small emission
peak near the NaI 5896Å absorption line.
The data are in FITS format. The FITS header does not include the
units, which are described above.
The spectral types and luminosity classes given in the published paper
supersede those given in the FITS headers.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
stars.dat 68 137 *List of stars present in the "fits" subdirectory
fits/* . 137 Subdirectory containing the 137 FITS spectra
-------------------------------------------------------------------------------
Note on stars.dat: the file contains in addition 7 blank lines which
separate the spectral types. This list, close to Table 1 of the
paper, is however not identical: some stars listed in the paper
are not in the file, and the file contains a few additional stars
not listed in the paper.
-------------------------------------------------------------------------------
Byte-by-byte Description of file: stars.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HD HD number (Cat. III/135)
8- 20 A13 --- Sp MK Spectral Type (from the paper)
22- 23 I2 h RAh Right Ascension J2000 (hours) (from SIMBAD)
25- 26 I2 min RAm Right Ascension J2000 (minutes)
28- 31 F4.1 s RAs Right Ascension J2000 (seconds)
33 A1 --- DE- Declination J2000 (sign) (from SIMBAD)
34- 35 I2 deg DEd Declination J2000 (degrees) (from SIMBAD)
37- 38 I2 arcmin DEm Declination J2000 (minutes)
40- 41 I2 arcsec DEs Declination J2000 (seconds)
44- 48 F5.2 mag Bmag Johnson B magnitude (from SIMBAD)
50- 54 F5.2 mag Vmag Johnson V magnitude (from SIMBAD)
57- 68 A12 --- FITSfile File name in "fits" subdirectory
-------------------------------------------------------------------------------
History:
* The spectra were received at ADC (Paul Kuin) in December 1994.
* 02-Nov-2003: the file "stars.dat" made from the FITS headers wad added.
The positions and magnitudes were extracted from SIMBAD, and the spectral
classes were reported from the Table 1 of the paper.
(End) Francois Ochsenbein [CDS] 02-Nov-2003