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name="StewartBoogertPhotometry2016" |
-- AnishaVadher - 14 Oct 2016
- Working out how much background for each pixel
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- 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.
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- Histrogram of number of photoelectrons for a 0.1s exposure in the dark frame with 45 bins.:
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- Histrogram of number of photoelectrons for a 0.1s exposure in the dark frame with 45 bins.:
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- 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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- 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.
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- 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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