Estimation of Photon Number
m
AB
mag
Wavelength
angstrom
Diameter of Telescope
cm (
Others
UH 88inch
OAO 74inch
OAO 36inch
SUBARU
Tohoku 40cm
)
Eff. of Entrance Slit
(
value
seeing : slit
" , seeing
" )
Eff. of Instrument
Eff. of Atmosphere
Band Width
angstrom
Exposure Time
sec
Readout Noise
e
-
rms
Apeature Size
pixels ( x
frame(s) )
Photon Flux
photons/sec/cm
2
/angstrom
Total Photons
photons
S/N (only photon noise)
(
%)
S/N (according to r.o.noise)
(
%)
Ver 1.3 : 2014/12/18
Akitaya,H
