-- AnishaVadher - 13 Oct 2016

  • Working out how much background for each pixel
  • Plotted a histogram of number of photoelectrons against the frequency for a 0.1s exposure in the dark frame which follows a Gaussian distribution
  • Number of photoelectrons = pixel value (ADU) * Gain
  • Gain = 2.3 e/ADU (value from PH2900 report)
  • From the histogram I will obtain the value at the peak and the error from the FWHM
  • Error in the peak = FWHM/2.35
  • I will get these statistics for each exposure time in the dark frames that I have taken and plot the peak value as a function of exposure time and the error as a function of exposure time.
  • There are big gaps between the bins which I am not sure why.

  • Also plotted a histogram for the sum of pixel along the x-axis values against frequency for a 0.1s exposure in the dark frame which follows a Poisson distribution
  • The histograms from the sum of pixels along the y-axis follows a Gaussian distribution.
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PNGpng Difference_between_summing_across_x-axis_and_y-axis.png r1 manage 38.8 K 14 Oct 2016 - 00:01 AnishaVadher Histograms to show the difference between summing across x-axis and y-axis for 0.1s exposure dark frame
PNGpng Histogram_of_number_of_photoelectrons_for_0.1s_exposure.png r1 manage 18.4 K 13 Oct 2016 - 23:58 AnishaVadher Histrogram of number of photoelectrons for a 0.1s exposure in the dark frame.
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Topic revision: r1 - 14 Oct 2016 - AnishaVadher

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