wfgs2 Exposure Time Calculator for imaging
These calcutation based on the NGC 869 observation.
And these calculations are also based on the following reference.
==Stellar Temperatures==
Mark J. P and Eric E. M 2013
-- See
this page
Calculate S/N ratio
=== S/N ratio ===
B
V
Rc
Ic
g'
r'
i'
* Limiting magnitude with
sec observation (S/N = 10)
B
mag
V
mag
Rc
mag
Ic
mag
g'
mag
r'
mag
i'
mag
Observation Settings
Exposure time
sec
Target Imformation
object magnitude
U
B
V
Rc
Ic
g'
r'
i'
z'
mag
AB mag
Vega mag
star spectral type
O5
B5V
A5V
F5V
G5V
K5V
M0V
M5V
M9V
Calculate Exposure time
=== Exposure time (sec) ===
B
V
Rc
Ic
g
r
i
Calculate total observation time : Expsure time
sec
Observation Settings
S/N ratio
Target Imformation
object magnitude
U
B
V
Rc
Ic
g'
r'
i'
z'
mag
AB mag
Vega mag
star spectral type
O5
B5V
A5V
F5V
G5V
K5V
M0V
M5V
M9V
last update : 24 Jul. 2024