ESPaDOnS CFHT exposure time calculator
v2.0
This Exposure Time Calculator is not up-to-date. Please use the most current ETC, which can be found
here
.
Calculator options
CCD chip
Olapa 1 amp
EEV1 (old)
calculate exposure time
calculate S/N only
Exposure Time :
sec
S/N :
@ wavelength :
372
378
384
391
398
405
412
420
428
436
444
453
463
472
482
493
504
515
527
540
553
567
581
597
613
630
648
667
687
709
732
756
782
810
840
872
907
945
986
1031
nm
* Select "Olapa 1 amp" for 2011A
Source model
V magnitude :
Effective Temperature :
K
Observing conditions
Image Quality :
arcsec
Airmass :
Instrument configuration
Observing Mode:
polarimetric (r=65K)
spectroscopic / star+sky (r=65K)
spectroscopic / star only (r=80K)
CCD Readout Mode:
slow (noise=2.99e, gain=1.09e/adu, readout time=60s)
normal (noise=3.80e, gain=1.22e/adu, readout time=35.5s)
fast (noise=4.12e, gain=1.1.51e/adu, readout time=31.5s)
Sky brightness
Moon :
new
crescent
quarter
gibbous
full
angular dist. from moon :
deg
zenithal dist. of moon :
deg
This webpage is based on the ESPaDOnS exposure time calculator webpage by J-F Donati and S. Baratchart . © Eder Martioli, last update Oct 10, 2011.