TriCCS Exposure Time Calculator

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Input

Object Flux
object type	point source extended source
	g-band	r-band	i-band	z-band
target magnitude (point source)					[AB mag]
target surface brightness (extended source)					[AB mag arcsec-2]
aperture size (extended source)					[arcsec in diameter]
Sky Condition
seeing (or PSF size)
moon brightness	dark grey bright
sky brightness					[AB mag arcsec-2]
Observation Settings
exposure time of a frame					[sec]
number of frames
CMOS gain (4 for exp_time ≥ 5 sec. 8 for 1 ≤ exp_time ≤ 5 sec.)
For Experts
optics throughput (including atmosphere and telescope)					[%]
center wavelength					[Å]
bandwidth					[Å]
field of view per pixel					[arcsec2]
number of combining pixels					[pixel]
object flux fraction in aperture					[%]
readout noise					[e- pixel-1]
dark current					[e- s-1 pixel-1]
M1 radius					[cm]
M1 shaded radius by M2					[cm]

Result

band	total exp time [sec]	S/N	total signal [e-]	total noise [e-]	object photon noise [e-]	sky and dark photon noise [e-]	readout noise [e-]
g
r
i
z