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R~18000 Spectral Templates

High-resolution (R~18,000), K-band spectra of 25 standard stars were obtained at each of two grating settings targeting strong absorption lines: (1) Order 34 (e.g. Na, Sc, Si, Ti & Fe; 2.180 – 2.240 um) and (2) Order 33 (e.g. Ca, Mg, and CO; 2.260 – 2.320 um). In general, the standards were chosen from ones in the literature that had reported effective temperatures, surface gravities, and metallicities based on the compilation from Cayrel et al 1997, A&AS, 124, 299. The spectra were obtained through two observing programs (GS-2004B-SV-27 and GS-2006A-DD-02) carried out in poor weather (CC=90, IQ=Any). Using the GNIRS 110.5 l/mm grating with the long camera and the 0.1 arcsecond (2 pixel) slit, spectral type standards with corresponding telluric calibration stars were observed at high signal-to-noise (S/N > 40).

The following table contains the list of observed stars, organized by spectral type. Heliocentric radial velocities and magnitudes are from Simbad; spectral type, effective temperature, surface gravity, and metallicity values are given by Cayrel et al. (1997, A&AS, 124, 299). The data are in standard fits format, shifted to rest velocity, and normalized to 1.

We thank former GNIRS instrument scientist, Greg Doppmann, for making the high-resolution spectral library available. Please contact Greg (gdoppmann at noao dot edu) with any questions about the observations and data reduction.


The High Resolution (R=18,000) GNIRS library of  late spectral templates - V1.0
Star
V
(mag)
vr
(km/s)
Sp
Type
Teff
(K)
Log g
[Fe/H]
Order 34
(2.180-2.240μm)
Order 33
(2.260-2.320μm)
HD6254
4.82
-1.0
G8IV
4710
2.8
-0.25
data / plot data / plot
HD10700
3.50
-16.4
G8V
5067
4.05
-0.58
data / plot data / plot
HD147675
3.87
5.4
G9III
5040
3.5
-0.05
data / plot data / plot
HD74137
4.87
-2.3
K0III
4620
3.0
-0.01
data / plot data / plot
HD28
4.63
-6.1
K0III
4710
2.73
-0.31
data / plot data / plot
HD155886
5.29
-0.6
K0V
5117
4.6
-0.19
data / plot data / plot
HD5286
5.51
1.5
K1IV
4778
3.08
0.02
data / plot data / plot
HD155885
5.33
0.0
K1V
5091
4.6
-0.15
data / plot data / plot
HD66478
5.33
-2.78
K2III
n/a
n/a
n/a
data / plot data / plot
HD4628
5.75
-12.6
K2V
4941
4.6
-0.29
data / plot data / plot
HD81797
2.00
-4.3
K3II-III
4252
1.82
-0.16
data / plot data / plot
HD191408
5.31
-129.8
K3V
4893
4.55
-0.33
data / plot data / plot
HD78541
4.58
-44.7
K4/5III
3890
1.55
-0.29
data / plot data / plot
HD209100
4.69
-40.4
K4.5V
4541
4.6
-0.1
data / plot data / plot
HD5384
5.88
1.9
K5III
3950
1.66
0
data / plot data / plot
HD201901
5.42
-42
K5III
n/a
n/a
n/a
data / plot data / plot
HD156026
6.34
-1.6
K5V
4463
4.7
-0.16
data / plot data / plot
HD157881
7.54
-24.4
K7V
4000
4.5
0.4
data / plot data / plot
HD198542
4.12
9.0
M0III
3870
1.44
-0.24
data / plot data / plot
HD33793
8.89
245.5
M1V
3524
4.87
-0.5
data / plot data / plot
HD36395
7.92
10.6
M1.5V
3626
4.8
0.6
data / plot data / plot
HD57615
5.91
23.4
M3III
n/a
n/a
n/a
data / plot data / plot
HD30959
4.75
-7.9
M3
3452
0.8
-0.15
data / plot data / plot
GJ699
9.54
-106.8
M4V
n/a
n/a
n/a
data / plot data / plot
GJ65 East
12.52
29.0
M5.5V
n/a
n/a
n/a
data / plot data / plot