wfgs2 Exposure Time Calculator for Spectroscopy

These calculations are based on the following observation.

==Conditions==
seeing size: 1.5 arcsec
slit width: 1.6 sec with slit-mrr
slit filter: LWP as an Order Cut filter

==Observated Star data==
108 Virginis (HR5501)
star spectral type B9.5V
-- See this page

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
Instrument Setting
Grism
Center Wevelength
slit width "
Observation Settings
Expsure time sec
Target Imformation
object magnitude
mag
star spectral type


Calculate Exposure time
Instrument Setting
Grism
Center Wevelength
slit width "
Observation require
S/N ratio
Target Imformation
object magnitude
mag
star spectral type

last update : 10 Mar. 2024>