2dF Signal/Noise Calculator
Derived from empirical efficiencies obtained from observations of faint Landolt standards, January 1997, with 300B grating in 1" seeing.
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Observation Parameters:
Band:
B
V
R
Magnitude:
Sky
Dark
Grey
Bright
Specify:
mags/arcsec^2
Fraction of light in Fibre:
Galaxies 1" seeing (0.43)
Galaxies 2" seeing (0.30)
Stars 1" seeing (0.94)
Stars 2" seeing (0.50)
Specify:
Instrument Parameters:
Grating:
1200B
1200R
1200V
270R
300B
600R
600V
Exposure:
seconds
Karl Glazebrook
Last change: October 30th, 1998