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Point sources
Limiting magnitude
versus
on-object integration time
, when observing in the background limited case for S/N equal to 3 and 0.7" seeing.
Limiting magnitude
versus
seeing
, when observing in the background limited case for S/N equal to 3 and 1 hour on-object exposure time.
Limiting magnitude
versus
signal to noise ratio
, when observing in the background limited case for 1 hour on-object exposure time and 0.7" seeing.
NOTE:
Exposure time here refers to total on-object exposure time. It does not include either the exposure time on-sky nor overheads.
Last Updated: 12 July 2001
Almudena Zurita
azurita@ing.iac.es
