1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Pixel count for faint star

  1. Dec 15, 2009 #1
    1. The problem statement, all variables and given/known data
    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)


    2. Relevant equations
    none


    3. The attempt at a solution
    i really havent 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 dont know enough about the subject to make a decent guess at the question.


    thanks
     
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?



Similar Discussions: Pixel count for faint star
  1. Counting experiment (Replies: 0)

  2. Binary Star Analysis (Replies: 0)

Loading...