VLTI MATISSE
VLTI Prototype Mode
Version P115
Description
FAQ
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VLTI MATISSE ETC
Instrument Properties
Observing Mode:
Hybrid / LowLM / LowN / LinternalFringeCoherencer
Hybrid / LowLM / LowN / NinternalFringeCoherencer
Hybrid / MediumLM / LowN / LinternalFringeCoherencer
Hybrid / MediumLM / LowN / NinternalFringeCoherencer
Hybrid / HighLM / LowN / LinternalFringeCoherencer
Hybrid / HighLM / LowN / NinternalFringeCoherencer
Hybrid / LowLM / HighN / LinternalFringeCoherencer
Hybrid / LowLM / HighN / NinternalFringeCoherencer
Hybrid / MediumLM / HighN / LinternalFringeCoherencer
Hybrid / MediumLM / HighN / NinternalFringeCoherencer
Hybrid / HighLM / HighN / LinternalFringeCoherencer
Hybrid / HighLM / HighN / NinternalFringeCoherencer
LM central wavelength
μm
Target Properties
Target Spectrum:
Blackbody:
Temperature:
K
Target Flux:
Jy in
L
M
N
Power Law
Index:
F(λ) ∝ λ
index
Target geometry:
Uniform Disc:
Diameter:
mas
Gaussian:
FWHM:
mas
Elliptical Gaussian:
Major axis:
mas
Minor axis:
mas
Position Angle:
deg
(*)
Binary:
Diameter, Primary:
mas
Diameter, Secondary:
mas
Separation:
mas
Position Angle:
deg
(*)
Flux Fraction, Primary:
(**)
Flux Fraction, Secondary:
(**)
(*) angles counted from North to East
(**) Flux Fraction, Primary + Flux Fraction, Secondary = 1
Time constraints:
Start hour angle:
-12
-11
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
7
8
9
10
11
hour
Duration:
1
2
3
4
5
6
7
8
9
10
11
12
hours
Step:
30
15
6
1
minutes
Baseline Configuration
Configuration:
U1-U2-U3
U1-U2-U4
U1-U3-U4
U2-U3-U4
A0-B2-C1
A0-B2-D0
A0-C1-D0
B2-C1-D0
A0-J2-G1
A0-J2-J3
A0-G1-J3
J2-G1-J3
D0-K0-G2
D0-K0-J3
D0-G2-J3
K0-G2-J3
Small (A0-B2-C1-D0)
Medium (D0-G2-J3-K0)
Large (A0-G1-J2-K0)
Extended (A0-B5-J2-J6)
UT-Array (UT1-UT2-UT3-UT4)
VLTI Station Positions
Sky Conditions
Moon FLI:
Airmass:
Almanac
Almanac
Time
UT
Time step forward/back
sec
min
hour
day
week
month
year
MJD
Target
Target coordinates
Name or ID:
α
°
δ
°
toggle units
UT rise
culm.
set
Hour Angle
azimuth
altitude
zenith distance
airmass
FLI
moon/sun
phase angle
moon/target
separation
Target
Moon
Sun
An
advanced almanac
is available in the ESO SkyCalc sky model calculator
PWV:
0.10
0.25
0.50
1.0
1.5
2.5
3.5
5.0
7.5
10.0
20.0
30.0
mm
Probability
%
of realising the PWV ≤
10.00
mm
Declination:
deg
Results
Observation time (Time on target + time on sky if chopping is performed):
240s (4min) is the actual time on fringes per OB
seconds
LM band
N band
SNR on Visibility
2
Expected precision on differential phase
deg
deg
Expected precision on closure phase
deg
deg
Plots:
Toggle All / No Plots
LM band
N band
Visibility
2
Differential Phase
Closure Phase
Target Spectrum
Sky Spectrum
Loss of Correlated Magnitude
SNR / Observation Time
Uncertainties on Differential and Closure Phases
Delay Line
Baseline length
Target altitude
Target azimuth
Airmass
Observability Constraints
Send comments and questions via
https://support.eso.org/