J/ApJ/508/397 H-band Spectral Standards (Meyer+ 1998)
Near-Infrared Classification Spectroscopy: H-Band Spectra
of Fundamental MK Standards
Meyer M.R., Edwards S., Hinkle K.H., Strom S.E.
<Astrophys. J. 508, 397 (1998)>
=1998ApJ...508..397M 1998ApJ...508..397M
ADC_Keywords: Spectra, infrared; Stars, standard
Keywords: infrared: spectroscopy - stars: spectral classification -
stars: standards - techniques: spectroscopic
Description:
We present a catalogue of H-band spectra for 85 stars of approximately
solar abundance observed at a resolving power of 3000 with the KPNO
Mayall 4m Fourier Transform Spectrometer. The atlas covers spectral
types O7-M5 and luminosity classes I-V as defined on the MK system.
The final reduced spectra are available in addition to data products
used in the analysis of the paper such as Tables of equivalent width
measurements for spectral features of interest in deriving effective
temperatures and estimating luminosity classes of stars. The final
spectra cover wavelength range 1.52 to 1.79 microns.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 72 106 H-band Survey sample (table1 of paper)
eqw.dat 118 108 *Measured Equivalent Widths (tables 5-8 of paper)
spectra.dat 36 147 List of spectra contained in "sp" subdirectory
tables.tex 98 513 Tables of paper, LaTeX
sp/* . 147 Final reduced spectra (FITS format)
plots/* . 14 *Various plots and figures (PS format)
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Note on eqw.dat: measured equivalent width in cm-1.
The conversion to equivalent width in Angstroms is
EW(Å) = [EW(cm-1)/sigma2] x 108.
Note on plots/*: a subdirectory containing various plots and figures.
There are four types of files in this directory:
1. Wavelength plotted spectra - e.g. classI.ps
2. Wavenumber plotted spectra - e.g. classIcm.ps
3. Figures from the published manuscript - e.g. fig1.ps
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See also:
J/ApJS/111/445 : Spectra of normal stars in the K band (Wallace+ 1997)
http://www.noao.edu/archives.html : NOAO Data Archives, includes
"A Library of Medium Resolution Infrared Stellar Spectra"
Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq [1,107] Star sequential number
5 A1 --- WH97 [*] when star belongs to list by
Wallace & Hinckle (J/ApJS/111/445)
6- 9 I4 --- HR ? Number in Bright Star Catalog (V/50)
11 A1 --- f_HR [def] Note on star (3)
13- 29 A17 --- Name Other name of the star
31- 35 F5.2 mag Hmag ? H-band estimated magnitude (1)
36 A1 --- u_Hmag [?] Uncertainty indicator
39- 45 A7 --- SpTemp Temperature class
49- 57 A9 --- SpLC Luminosity Class
61- 63 I3 km/s RV ? Heliocentric Radial Velocity
64- 67 A4 --- n_RV Note on RV (2)
69 A1 --- l_vsini [<] Limit flag on vsini
70- 72 I3 km/s vsini ? Rotational velocity
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Note (1): H-band magnitude estimated from V-band magnitude of the
Bright Star Catalogue, spectral type, and intrinsic colors (see
Koornneef 1983A&A...128...84K 1983A&A...128...84K).
Note (2):
V" and "V?" indicate variable or suspected variable radial velocity,
respectively. "SB1" and "SB2" indicate single- and double-lined
spectroscopic binaries, respectively. "O" indicates that orbital data
is available in the Bright Star Catalogue.
Note (3): the symbols are:
d = Previously classified as G0Ia, but it is intrinsically brighter.
e = Taken from Jaschek, Conde, & de Sierra (1964), Cat. III/18
f = Taken from Henry et al. (1994AJ....108.1437H 1994AJ....108.1437H).
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Byte-by-byte Description of file: eqw.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq [1,107] Star sequential number
5- 12 A8 --- Name Proper name of the source
14- 18 I5 K Teff Effective temperature from Table 2
20- 22 A3 --- LClass Luminosity class assigned from references
24- 28 A5 --- Date Date of observation from Table 3
31- 33 I3 --- Scan Scan number
37- 39 I3 --- S/N Measured signal-to-noise from difference of
forward and backward scans
43- 46 F4.2 --- Amass Airmass of the observations where
zenith = 1.0
48- 54 F7.4 cm-1 EW1 Equivalent widths measured for Mg5844
56- 62 F7.4 cm-1 EW2 Equivalent widths measured for OH5920
64- 70 F7.4 cm-1 EW3 Equivalent widths measured for HI5950
72- 78 F7.4 cm-1 EW4 Equivalent widths measured for Al5973
80- 86 F7.4 cm-1 EW5 Equivalent widths measured for Si5993
88- 94 F7.4 cm-1 EW6 Equivalent widths measured for CO6018
96-102 F7.4 cm-1 EW7 Equivalent widths measured for CO6170
104-110 F7.4 cm-1 EW8 Equivalent widths measured for Si6264
113-118 F6.4 cm-1 EW9 Equivalent widths measured for Mg6345
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Byte-by-byte Description of file: spectra.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq [1,107] Star sequential number
5- 36 A32 --- FITSfile FITS file with spectrum in "sp" subdirectory (1)
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Note (1): the files are in FITS format and are named according to:
sourcename.scannumber.av.azc.h.nm.xc.fit
The forward and backward scans have been averaged (av). The spectra
have been apodized to an effective resolution of 2.1 cm-1 to
eliminate "ringing" in the data (azc). The H-band spectra (h) have
been normalized using a four-segment spline-fitting function and care
was taken to keep the residuals from this fit to within 1% (nm). The
data have been corrected for telluric absorption by deriving an
opacity map of the atmosphere through observation of standard stars as
a function of airmass (xc). See the manuscript for details. The
signal-to- noise of the final reduced spectra was determined from the
difference of the forward and backward scans and is presented in the
table*.dat files for each combined (averaged) source scan.
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Acknowledgements: Michael Meyer
* 26-Feb-2005: FITS file with the spectrum of β Aql indicates
"HR6702" instead of "HR7602"
(End) Gail Schneider [SSDOO/ADC] 09-Feb-2000