Difference: 20161202_MSciSpectroscopyMeeting (1 vs. 3)

Revision 302 Dec 2016 - WilliamBurrows

Line: 1 to 1
 
META TOPICPARENT name="StewartBoogertSpectroscopy2016"
Calibrating
Line: 8 to 8
 
  • Hyperbolic function used:
\begin{equation} y = b^2 \sqrt{\frac{x - \mu}{a^2} - 1} \end{equation}
Added:
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>
  • Best guess values used are a = 1, b = 4, μ = 21
  • Lowest value of σ is 2.72
 
Added:
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  • Sigma of the Gaussian fit to the peak as a function of the camera rotation:
    sigma_Rotation_Cosine.png
  • Cosine function used:
\begin{equation} y = d \times \cos(x + \mu) + \sigma_{\rm{min}} \end{equation}
  • Best guess values used are a = 1, b = 4, μ = 1
  • Lowest value of σ is 3.49
 Vega spectrum peak finder

  • Cutoff value = 0.02
Line: 27 to 32
 
META FILEATTACHMENT attachment="latex55ded8302a17808b53a7be55ffdb89a0.png" attr="h" comment="" date="1480685899" name="latex55ded8302a17808b53a7be55ffdb89a0.png" user="zyvb951" version="1"
META FILEATTACHMENT attachment="Normalised_plot.png" attr="" comment="Plot of normalised Vega spectrum with its normalised second derivative" date="1480686178" name="Normalised_plot.png" path="Normalised_plot.png" size="141366" user="zyvb137" version="1"
META FILEATTACHMENT attachment="VegaSpec_plot.png" attr="" comment="Vega spectrum with its peak located" date="1480686207" name="VegaSpec_plot.png" path="VegaSpec_plot.png" size="90396" user="zyvb137" version="1"
Added:
>
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META FILEATTACHMENT attachment="sigma_Rotation_Cosine.png" attr="" comment="Sigma of the Gaussian fit to the peak as a function of the camera rotation" date="1480688850" name="sigma_Rotation_Cosine.png" path="sigma_Rotation_Cosine.png" size="49101" user="zyvb951" version="1"
META FILEATTACHMENT attachment="latex623c013ea2fb609616ffdccb2ee34850.png" attr="h" comment="" date="1480689126" name="latex623c013ea2fb609616ffdccb2ee34850.png" user="zyvb951" version="1"

Revision 202 Dec 2016 - JamesAngthopo

Line: 1 to 1
 
META TOPICPARENT name="StewartBoogertSpectroscopy2016"
Calibrating
Line: 9 to 9
 
\begin{equation} y = b^2 \sqrt{\frac{x - \mu}{a^2} - 1} \end{equation}
Added:
>
>		Vega spectrum peak finder

  • Cutoff value = 0.02
  • Size of xrange has to be greater than 2
  • The length of adjacent value considered = 3

  • Plot of normalised Vega spectrum with its normalised second derivative:
    Normalised_plot.png

  • Vega spectrum with its peak located:
    VegaSpec_plot.png
 

-- WillBurrows - 02 Dec 2016

META FILEATTACHMENT attachment="sigma_Distance_Hyperbole.png" attr="" comment="Sigma of the Gaussian fit to the peak as a function of the lens-camera distance" date="1480685700" name="sigma_Distance_Hyperbole.png" path="sigma_Distance_Hyperbole.png" size="53384" user="zyvb951" version="1"
Deleted:
<
<
META FILEATTACHMENT attachment="latexd75f477830f0c8abefd24e49531cafcb.png" attr="h" comment="" date="1480685821" name="latexd75f477830f0c8abefd24e49531cafcb.png" user="zyvb951" version="1"
 
META FILEATTACHMENT attachment="latex55ded8302a17808b53a7be55ffdb89a0.png" attr="h" comment="" date="1480685899" name="latex55ded8302a17808b53a7be55ffdb89a0.png" user="zyvb951" version="1"
Added:
>
>
META FILEATTACHMENT attachment="Normalised_plot.png" attr="" comment="Plot of normalised Vega spectrum with its normalised second derivative" date="1480686178" name="Normalised_plot.png" path="Normalised_plot.png" size="141366" user="zyvb137" version="1"
META FILEATTACHMENT attachment="VegaSpec_plot.png" attr="" comment="Vega spectrum with its peak located" date="1480686207" name="VegaSpec_plot.png" path="VegaSpec_plot.png" size="90396" user="zyvb137" version="1"

Revision 102 Dec 2016 - WilliamBurrows

Line: 1 to 1
Added:
>
>
META TOPICPARENT name="StewartBoogertSpectroscopy2016"
Calibrating

  • During the week, correct grating position was found and grating was stuck down
  • Sigma of the Gaussian fit to the peak as a function of the lens-camera distance:
    sigma_Distance_Hyperbole.png

  • Hyperbolic function used:
\begin{equation} y = b^2 \sqrt{\frac{x - \mu}{a^2} - 1} \end{equation}

-- WillBurrows - 02 Dec 2016

META FILEATTACHMENT attachment="sigma_Distance_Hyperbole.png" attr="" comment="Sigma of the Gaussian fit to the peak as a function of the lens-camera distance" date="1480685700" name="sigma_Distance_Hyperbole.png" path="sigma_Distance_Hyperbole.png" size="53384" user="zyvb951" version="1"
META FILEATTACHMENT attachment="latexd75f477830f0c8abefd24e49531cafcb.png" attr="h" comment="" date="1480685821" name="latexd75f477830f0c8abefd24e49531cafcb.png" user="zyvb951" version="1"
META FILEATTACHMENT attachment="latex55ded8302a17808b53a7be55ffdb89a0.png" attr="h" comment="" date="1480685899" name="latex55ded8302a17808b53a7be55ffdb89a0.png" user="zyvb951" version="1"
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