Exposure Time Calculator

OMM 1.6-m telescope · SDSS r band · SNR per resolution element

t_exp (s)

Frame rate (Hz)

Time / frame (s)

Sub-exposures 7200

r mag

Telescope OMM 1.6-m

λ₀ (Å) 6204.29

Resolution 120 000

Target SNR

Time required —

Efficiency (%)

Spatial pix

Dark (e⁻/s/pix)

CIC (e⁻/pix/read)

Sky (mag/arcsec²)

Fiber diam (arcsec)

—

SNR at r = 14

—

Signal photons / resel

—

Sub-exposures (4 Hz)

—

e⁻/pix/frame

—

RV precision

r mag	Signal (ph)	SNR	σ_RV	t → SNR 100

Shot (—%) CIC (—%) Dark (—%) Sky (—%)

Signal photons: —
CIC electrons : — (1 reads × 8 pix × 0.001)
Dark electrons : —
Sky electrons : —