Difference: StewartBoogertPhotometry20170222 (1 vs. 5)

Revision 522 Feb 2017 - LauraBevilacqua

Line: 1 to 1

META TOPICPARENT	name="StewartBoogertPhotometry2016"

Note: last week, report segments requested in place of usual weekly update.

Line: 13 to 13

Scaled Errors

Error on magnitudes now involves scaling parameters

Changed:

<
<

>
>

where m is the initial magnitude before scaling, c is the intercept in the linear fit (from last meeting) and g is the gradient of the linear fit
Laura - m_scaled.pdf

Changed:

<
<

Double Cluster HR of a single frame:

>
>

Double Cluster HR of a single frame:

96 stars, maximum mag = 13.623

Changed:

<
<

Double Cluster HR of a stacked frame:

>
>

Double Cluster HR of a stacked frame:

85 stars, maximum magnitude = 13.300
Lower star count in stacked frames possibly due to the stacking of read-out noise in each frame

Changed:

<
<

>
>

Dragonfly Cluster HR using scaling parameters from the Double Cluster

Dragonfly Cluster HR using dragonfly scaling parameters

210217.pdf: Anisha's Real data analysis (draft)

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"

Line: 36 to 39

META FILEATTACHMENT	attachment="CodeCogsEqn_5.gif" attr="" comment="" date="1487712056" name="CodeCogsEqn_5.gif" path="CodeCogsEqn_5.gif" size="2077" user="zyva858" version="1"
META FILEATTACHMENT	attachment="210217.pdf" attr="" comment="Real data analysis" date="1487712523" name="210217.pdf" path="210217.pdf" size="1451003" user="zyva858" version="1"
META FILEATTACHMENT	attachment="m_scaled.pdf" attr="" comment="magnitude scaling with fit parameters, and error" date="1487719320" name="m_scaled.pdf" path="m_scaled.pdf" size="167915" user="zyvb786" version="2"

Added:

>
>

META FILEATTACHMENT	attachment="dragonflyHR_dbclParams.png" attr="" comment="dragonfly hr with dbcl params" date="1487760830" name="dragonflyHR_dbclParams.png" path="dragonflyHR_dbclParams.png" size="69982" user="zyvb786" version="1"
META FILEATTACHMENT	attachment="dragonflyHR_dragonflyParams.png" attr="" comment="dragonfly hr with dragonfly params" date="1487760870" name="dragonflyHR_dragonflyParams.png" path="dragonflyHR_dragonflyParams.png" size="67813" user="zyvb786" version="1"

Revision 421 Feb 2017 - LauraBevilacqua

Line: 1 to 1

META TOPICPARENT	name="StewartBoogertPhotometry2016"

Note: last week, report segments requested in place of usual weekly update.

Line: 14 to 14

Error on magnitudes now involves scaling parameters

Changed:

<
<

where m is the magnitudes plotted in the HR diagram, c in the intercept in the linear fit (from last meeting) and g is the gradient of the linear fit

>
>

where m is the initial magnitude before scaling, c is the intercept in the linear fit (from last meeting) and g is the gradient of the linear fit
Laura - m_scaled.pdf

Double Cluster HR of a single frame:

Line: 34 to 35

META FILEATTACHMENT	attachment="latexab9975fa55bf89b822404cf84ae20ca9.png" attr="h" comment="" date="1487711999" name="latexab9975fa55bf89b822404cf84ae20ca9.png" user="zyva858" version="1"
META FILEATTACHMENT	attachment="CodeCogsEqn_5.gif" attr="" comment="" date="1487712056" name="CodeCogsEqn_5.gif" path="CodeCogsEqn_5.gif" size="2077" user="zyva858" version="1"
META FILEATTACHMENT	attachment="210217.pdf" attr="" comment="Real data analysis" date="1487712523" name="210217.pdf" path="210217.pdf" size="1451003" user="zyva858" version="1"

Added:

>
>

META FILEATTACHMENT	attachment="m_scaled.pdf" attr="" comment="magnitude scaling with fit parameters, and error" date="1487719320" name="m_scaled.pdf" path="m_scaled.pdf" size="167915" user="zyvb786" version="2"

Revision 321 Feb 2017 - AnishaVadher

Line: 1 to 1

META TOPICPARENT	name="StewartBoogertPhotometry2016"

Note: last week, report segments requested in place of usual weekly update.

Line: 12 to 12

Performed modified least squares fit.

Scaled Errors

Error on magnitudes now involves scaling parameters

Deleted:

<
<

%BEGINLATEX%

Changed:

<
<

\begin{equation}

>
>

where m is the magnitudes plotted in the HR diagram, c in the intercept in the linear fit (from last meeting) and g is the gradient of the linear fit

Changed:

<
<

{\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}

>
>

Double Cluster HR of a single frame:

Changed:

<
<

\end{equation}

>
>

96 stars, maximum mag = 13.623

Changed:

<
<

%ENDLATEX%

>
>

Double Cluster HR of a stacked frame:
85 stars, maximum magnitude = 13.300
Lower star count in stacked frames possibly due to the stacking of read-out noise in each frame

Changed:

<
<

-- AaronAndrews - 20 Feb 2017

>
>

210217.pdf: Anisha's Real data analysis (draft)

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"

Added:

>
>

META FILEATTACHMENT	attachment="DoubleSingleFrameHR.pdf" attr="" comment="Double Cluster HR of a single frame" date="1487711189" name="DoubleSingleFrameHR.pdf" path="DoubleSingleFrameHR.pdf" size="74061" user="zyva858" version="1"
META FILEATTACHMENT	attachment="DoubleStackedFramesHR.pdf" attr="" comment="Double Cluster HR of a stacked frame" date="1487711244" name="DoubleStackedFramesHR.pdf" path="DoubleStackedFramesHR.pdf" size="73355" user="zyva858" version="1"
META FILEATTACHMENT	attachment="DoubleStackedFramesHR.png" attr="" comment="Double Cluster HR of a stacked frame" date="1487711295" name="DoubleStackedFramesHR.png" path="DoubleStackedFramesHR.png" size="49543" user="zyva858" version="1"
META FILEATTACHMENT	attachment="DoubleSingleFrameHR.png" attr="" comment="Double Cluster HR of a single frame" date="1487711479" name="DoubleSingleFrameHR.png" path="DoubleSingleFrameHR.png" size="49146" user="zyva858" version="1"
META FILEATTACHMENT	attachment="latexab9975fa55bf89b822404cf84ae20ca9.png" attr="h" comment="" date="1487711999" name="latexab9975fa55bf89b822404cf84ae20ca9.png" user="zyva858" version="1"
META FILEATTACHMENT	attachment="CodeCogsEqn_5.gif" attr="" comment="" date="1487712056" name="CodeCogsEqn_5.gif" path="CodeCogsEqn_5.gif" size="2077" user="zyva858" version="1"
META FILEATTACHMENT	attachment="210217.pdf" attr="" comment="Real data analysis" date="1487712523" name="210217.pdf" path="210217.pdf" size="1451003" user="zyva858" version="1"

Revision 221 Feb 2017 - LauraBevilacqua

Line: 1 to 1

META TOPICPARENT	name="StewartBoogertPhotometry2016"

Note: last week, report segments requested in place of usual weekly update.

Line: 10 to 10

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:

>
>

Scaled Errors

Error on magnitudes now involves scaling parameters

$\begin{equation} {\Delta m_{\rm scaled}} = m_{\rm scaled} \sqrt{\left\frac{\Delta m^{2}+\Delta c^{2}}{(m-c)^{2}}\right + \frac{\Delta g^{2}}{g^{2}}\right} <span style=&quot;background-color: transparent;&quot;>\end{equation} </span>$

Latex rendering error!! dvi file was not created.

-- AaronAndrews - 20 Feb 2017

Revision 120 Feb 2017 - AaronAndrews

Line: 1 to 1

Added:

>
>

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"

View topic | History: r5 < r4 < r3 < r2 | More topic actions...

Copyright © 2008-2021 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding RHUL Physics Department TWiki? Send feedback