G-CLEF ETC
(GMT)
Help
General
I want to specify:
Exposure Time
Normalized SNR
Vrms
Vrms (cm/s)
SNR
Exposure (s)
Wavelength (Å)
Exposure Limit (s)
Mode
MR
HT
PRV
NS-PRV
Mirrors
SNR/(LSF/2)
SNR/LSF
SNR/Binned Pixel
Binning (Spectral by Cross-Dispersion)
Red
1
2
3
1
2
3
4
Blue
1
2
3
1
2
3
4
Binning (Spectral by Cross-Dispersion)
Red
1
2
3
1
2
3
4
Blue
1
2
3
1
2
3
4
Binning (Spectral by Cross-Dispersion)
Red
5
10
15
5
10
15
20
30
Blue
5
10
15
5
10
15
20
30
Binning (Spectral by Cross-Dispersion)
Red
3
6
9
3
9
12
18
Blue
3
6
9
3
9
12
18
Observation
Date
Air Mass
1
1.2
1.5
2
Lunar Phase (days)
0 (New)
3
7
10
14 (Full)
PSF Model
Gaussian
Moffat
Seeing
0.50 arcsec (25th percentile)
0.63 arcsec (50th percentile)
0.79 arcsec (75th percentile)
Target
Spectrum Wavelength Shift
Velocity
Red Shift
Line-of-Sight Velocity (km/s)
Red Shift (Z)
ISM Extinction RV
E(B-V)
Magnitude
Color Band
u
g
v
r
i
z
Model
Stellar PHOENIX
Stellar Kurucz
Power Law
User Model
Temperature (K)
Surface Gravity (m/s/s)
[Fe/H]
-4.0
-3.0
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
[α/Fe]
Temperature (K)
Surface Gravity (m/s/s)
[Fe/H]
[α/Fe]
0
0.4
vsini (km/s)
0
2.5
10
30
100
200
Exponent (k): F
λ
~(λ)
Model Name:
Browse…
Results
Required exposure time ...
0.00e+00 s
SNR/(LSF/2) (at
0.00 Å
) ...
0.0e+00
RV precision ...
-1.0e+03 cm/s
Plot Data
Display:
SNR
Electrons