- #1
the riddick25
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Homework Statement
after subtracting the bias level from your count, you get a value of (N). to find the noise, you calculate sqrt(N) = noise.
now the question,
As above, your image has a noise of sqrt(N). What can you say about the presence of a faint star in the image that has a total number of counts that is LESS than sqrt(N)
Homework Equations
none
The Attempt at a Solution
i really haven't a clue about this question.
i would have guessed that its something like the sqrt(N) is an average value, so it is entirely possible for there to be a count less than that value.
but i don't know enough about the subject to make a decent guess at the question.
thanks