EsPaDOnS
exposure time calculator
Source model
exposure time :
sec
V magnitude :
effective temperature :
K
Observing conditions
seeing :
arcsec
airmass :
Instrument configuration
instrument mode:
polarimetric (r=65K)
spectroscopic / object+sky (r=65K)
spectroscopic / object only (r=80K)
CCD readout speed:
xslow (noise=2.5e, gain=0.85e/adu, readout time=90s)
slow (noise=2.9e, gain=1.25e/adu, readout time=65s)
normal (noise=4.2e, gain=1.40e/adu, readout time=40s)
fast (noise=7.4e, gain=1.85e/adu, readout time=25s)
Sky brightness
moon :
new
crescent
quarter
gibbous
full
angular dist. from moon :
deg
zenithal dist. of moon :
deg
© Jean-François Donati and Sebastien Baratchart, last update Sep 16, 2004
