Difference: StewartBoogertPhotometry20170222 (1 vs. 2)

Revision 221 Feb 2017 - LauraBevilacqua

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META TOPICPARENT name="StewartBoogertPhotometry2016"
Note: last week, report segments requested in place of usual weekly update.
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  • Matched ~30 brightest stars for each image in the Dragonfly cluster (blue filter), comparing to first image in set.
  • Constructed chi-square to compare measured positions in one image to transformed measured positions in offset image.
  • Performed modified least squares fit.
Added:
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Scaled Errors
  • Error on magnitudes now involves scaling parameters
  \begin{equation}  {\Delta m_{\rm scaled}} = m_{\rm scaled} \sqrt{\left\frac{\Delta m^{2}+\Delta c^{2}}{(m-c)^{2}}\right + \frac{\Delta g^{2}}{g^{2}}\right}   <span style=&amp;quot;background-color: transparent;&amp;quot;>\end{equation} </span>

Latex rendering error!! dvi file was not created.
  -- AaronAndrews - 20 Feb 2017

Revision 120 Feb 2017 - AaronAndrews

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META TOPICPARENT name="StewartBoogertPhotometry2016"
Note: last week, report segments requested in place of usual weekly update.

Aaron - Image offset parameter investigation: Offset_Parameters.pdf

Summary:

  • Needed to determine accurate offsets (position and rotation transform) of images.
  • Matched ~30 brightest stars for each image in the Dragonfly cluster (blue filter), comparing to first image in set.
  • Constructed chi-square to compare measured positions in one image to transformed measured positions in offset image.
  • Performed modified least squares fit.

-- AaronAndrews - 20 Feb 2017

META FILEATTACHMENT attachment="Offset_Parameters.pdf" attr="" comment="Report segment - offset parameters" date="1487632817" name="Offset_Parameters.pdf" path="Offset Parameters.pdf" size="107422" user="zyva010" version="1"
 
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