MEGACAM
Exposure Time and Signal-to-Noise Ratio Calculator
Compute
source type
snr
filter
mAB or Flux (narrow filter only)
photometry
aperture
etime
snr
point source
galaxy
extended source
u
g
r
i
z
uS
gS
rS
iS
zS
gri
CaHK
Ha
HaOFF
OIII
OIIIOFF
M4112
M4376
magAB
flux (ergs/s/cm^2)
aperture
psf
optimal aperture
fixed aperture
96% flux aperture
sky background
airmass
transparency
seeing "
dark
grey
bright
specify
e-time (s)
radius "
flux frac (%)
obj saturation (s)
sky saturation (s)
© 2015 Canada-France-Hawaii-Telescope Corporation
Collaborative effort of Simon Prunet, Pascal Fouque, and
Billy Mahoney