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Homework Help: Photon counts, finding background

  1. Nov 28, 2011 #1
    1. The problem statement, all variables and given/known data

    I have been given some data, which is 20 successive 500second bins containing raw photon counts.(ie signal+data)
    The xray source is known to show flaring and from optical properties one suspects that it may show eclipses lasting ~1000sec.

    I need to estimate the significance of any possible eclipse in the data.
    BUT first i need to find the background level in the raw counts data.
    How do i get started on this?

  2. jcsd
  3. Nov 28, 2011 #2


    User Avatar

    Generally, the background level is estimated from an extraction of the photon counts in a region that doe not contain the source (any source)...
    As an alternative (maybe) you can consider a certain statistics, and then value the variance, but I am not sure of this.
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