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Old 17-01-2019, 10:18 AM
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Merlin66 (Ken)
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Join Date: Oct 2005
Location: Junortoun Vic
Posts: 8,904
Guys,
I used the Gaussian Normal curve to KISS....
the various noise components are Poisson distributions.

The Npix is a typo (sorry!) it should have been npix - "the number of pixels under consideration for the SNR calculation" - Howell p74.
Yes, Nsig is the "total number of photons collected from the object of interest"
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