Difference between revisions of "September 4, 2007 - Cosmic Telescope"
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Instrumental Uncertainty =<math>\sigma = \sqrt{\frac{\sum (x_i - \bar{x})^2}{N-1}} = 12.12</math> counts per hour | Instrumental Uncertainty =<math>\sigma = \sqrt{\frac{\sum (x_i - \bar{x})^2}{N-1}} = 12.12</math> counts per hour | ||
| − | + | The instrumental uncertainty is approximately equal to the Poisson sigma (<math>\sqrt{138}= 11.7</math>) counts per hour. | |
The cosmic ray telescope counting experiment appears to be following Poisson statistics. | The cosmic ray telescope counting experiment appears to be following Poisson statistics. | ||
[http://www.iac.isu.edu/mediawiki/index.php/Statistics_for_Experimenters See Statistics for Experimentalists] | [http://www.iac.isu.edu/mediawiki/index.php/Statistics_for_Experimenters See Statistics for Experimentalists] | ||
Revision as of 16:59, 5 September 2007
| Plateau Zeroing | |||||||
|---|---|---|---|---|---|---|---|
| Time Start | Time Stop | Time elapsed (min.) | Thresholds on both Scintillators | Singles Count (on top) | Coinc. Counts | Coinc. per minute | Angle measure |
| 1:35 pm on 8/31 | 1:10 pm on 9/04 | 5725 min | 225 | 626816 | 1654 | .2889 | 75 degrees |
Cosmic rates measured each hour when the telecope accepts cosmics which intersect the earth's surface perpendicularly (defined as zero degrees).
| Time Start | Time Stop | Time elapsed (hour) | Singles Count (on top) | Coinc. Counts | Coinc. per hour | ||
| 1:20 pm | 2:20 pm | 1 | 5694 | 127 | 127 | 11.3 | 121 |
| 2:20 pm | 3:20 pm | 1 | 4896 | 136 | 136 | 11.6 | 4 |
| 3:20 pm | 4:20 pm | 1 | 4655 | 151 | 151 | 12.2 | 169 |
Mean = 138 counts per hour
Instrumental Uncertainty = counts per hour
The instrumental uncertainty is approximately equal to the Poisson sigma () counts per hour.
The cosmic ray telescope counting experiment appears to be following Poisson statistics. See Statistics for Experimentalists