SPHERE Exposure Time Calculator
ZIMPOL Zurich Imaging Polarimeter Mode
Version P115
Description
FAQ
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Target Setup
Stellar template spectrum:
Spectral Type:
O9V
B0V
B2V
B3V
B5V
B8V
A0V
A2V
A5V
F0V
F2V
F5V
G0V
G2V
G5V
K0V
K2V
K4V
K5V
K7V
M0V
M2V
M3V
M4V
M5V
M6V
Target Magnitude and Mag.System:
V
R
I
=
Vega
AB
Equatorial Coordinates:
Declination:
-85
-80
-75
-70
-65
-60
-55
-50
-45
-40
-35
-30
-25
-20
-15
-10
-5
0
+5
+10
+15
+20
+25
+30
+35
degrees
Hour Angle:
-4
-3
-2
-1
0
+1
+2
+3
+4
hours
(at the time of the middle of total integration)
Companion to be detected
Point Source
Extended Source:
mag:
per arcsec
2
; size:
arcsec
Sky Conditions
Turbulence Category:
10% (seeing ≤ 0.6" & tau0 ≥ 5.2ms
20% (seeing ≤ 0.7" & tau0 ≥ 4.4ms
30% (seeing ≤ 0.8" & tau0 ≥ 4.1ms
50% (seeing ≤ 1.0" & tau0 ≥ 3.2ms
70% (seeing ≤ 1.15 & tau0 ≥ 2.2ms
85% (seeing ≤ 1.4" & tau0 ≥ 1.6ms
Instrument Setup
Mode:
Polarimetric (slowPOL)
Polarimetric (fastPOL)
Imaging
Z/WFS Beam Splitter:
Grey
Dichroic
Derotator:
field-stabilized
pupil-stabilized
de-rotator fixed
de-rotator fixed
Filter:
N_R
B_Ha
cntHa
N_Ha
RI (Very Broad Band)
I_PRIM
R_PRIM
N_I
V
Cnt820
TiO_717
CH4_727
KI
Cnt748
Ha_NB
OI_630
V_S
V_L
730_NB
I_L
Hel
Coronagraph:
none
coron
Neutral Densities:
none
ND1
ND2
ND4
Observation Setup
Exposure Time:
seconds
range [10, 14400]
DIT:
1
2
5
10
20
50
100
200
500
1.2
2
5
10
20
50
100
10
20
50
100
200
500
seconds
Output Setup
Contrast Performance curve (all noise contributors cumulated)
Contrast curves (associated with each noise contributor)
Noise Contributors (logarithmic plot)
Orientation curve (as a function of hour angle)
Rotation Rate curve (as a function of hour angle)
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