
META TOPICPARENT 
name="StewartBoogertPhotometry2016" 
 AnishaVadher  14 Oct 2016
 Working out how much background for each pixel


 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.
 Edit  the gaps are due to the fact that the histogram only takes integer values so increasing the number of bins leads to more gaps in the histogram.


< < 
 Histrogram of number of photoelectrons for a 0.1s exposure in the dark frame with 45 bins.:

> > 
 Histrogram of number of photoelectrons for a 0.1s exposure in the dark frame with 45 bins.:


 Also plotted a histogram for the sum of pixel along the xaxis 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 yaxis follows a Gaussian distribution.


 Plotted the median intensity of the pixels as a function of exposure time using the values given from the image using np.median in python. I am yet to work out the errors.


< < 
 The median intensity as a function of exposure time.:

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> > 
 The median intensity as a function of exposure time.:
 Table of values obtained from Gaussian fit to dark frames
Exposure 
Fitted Mean 
Fitted Standard Deviation 
0.10 
917.12 
6.41 
0.20 
916.76 
6.42 
0.50 
916.65 
6.42 
001 
917.73 
6.43 
002 
916.64 
6.44 
005 
917.73 
6.47 
010 
919.34 
6.48 
020 
920.08 
6.51 
030 
920.96 
6.55 
040 
922.16 
6.58 
050 
922.69 
6.60 
060 
922.48 
6.62 
090 
925.88 
6.71 
200 
933.75 
6.99 
300 
939.33 
7.22 

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