Changeset 40559 for trunk/doc/release.2015/ps1.detrend/detrend.tex

Timestamp:

Nov 18, 2018, 10:38:23 AM (8 years ago)

Author:

eugene

Message:

updates based on a full re-read

File:

• trunk/doc/release.2015/ps1.detrend/detrend.tex (modified) (6 diffs)

trunk/doc/release.2015/ps1.detrend/detrend.tex

@@ -188 +188 @@
 view.
 
+\note{need to define PV3 (and PV0-2) here.  see datasystem.tx}
+
 %The Processing Version 3 (PV3) reduction represents the third full
 DR1 contains the results of the third full reduction of the Pan-STARRS
@@ -254 +256 @@
 section \ref{sec:discussion}.
 
+\note{describe gpc1 camera layout before the following paragraph}
+
 Image products presented in figures have been mosaicked to arrange
 pixels as follows.  Single cell images are arranged such that pixel
@@ -273 +277 @@
 mosaic.
 
-\textit{Note: These papers are being placed on the arXiv.org to
-  provide crucial support information at the time of the public
-  release of Data Release 1 (DR1).  We expect the arXiv versions to be
-  updated prior to submission to the Astrophysical Journal in January
-  2017.  Feedback and suggestions for additional information from early
-  users of the data products are welcome during the submission and
-  refereeing process.}
+%%\textit{Note: These papers are being placed on the arXiv.org to
+%%  provide crucial support information at the time of the public
+%%  release of Data Release 1 (DR1).  We expect the arXiv versions to be
+%%  updated prior to submission to the Astrophysical Journal in January
+%%  2017.  Feedback and suggestions for additional information from early
+%%  users of the data products are welcome during the submission and
+%%  refereeing process.}
 
 
@@ -298 +302 @@
 These corrections assume that the detector response is linear across
 the full range of values.  This assumption is not universally true for
-GPC1, and an additional set of detrending steps are required to remove
-these artifacts.  The first of these is the \IPPprog{burntool}
-correction, which removes the flux trails left by the incomplete
-transfer of charge along the readout columns.  These trails are
-generally only evident for the brightest stars, as only pixels that
-are at or beyond the saturation point of the detector leave residual
-charge.  More widespread is the non-linearity at the faint end of the
-pixel range.  Some readout cells and some readout cell edge pixels
-experience a sag relative to linear at low illumination, such that
-faint pixels appear fainter than expected.  The correction to this
-requires amplifying the pixel values in these regions to match the
-expected model.
+GPC1, and an additional set of detrending steps are required as a
+result.  The first of these is the \IPPprog{burntool} correction,
+which removes the flux trails left by the incomplete transfer of
+charge along the readout columns.  These trails are generally only
+evident for the brightest stars, as only pixels that are at or beyond
+the saturation point of the detector leave residual charge.  More
+widespread is the non-linearity at the faint end of the pixel range.
+Some readout cells and some readout cell edge pixels experience a sag
+relative to linear at low illumination, such that faint pixels appear
+fainter than expected.  The correction to this requires amplifying the
+pixel values in these regions to match the expected model.
 
 Large regions of some OTA cells experience significant charge transfer
@@ -496 +499 @@
 with the noise generally higher away from the read out amplifier
 (higher cell x pixel positions).  This is likely an effect of the
-row-by-row bias issue discussed below.  As a result of this
-increased noise, more sources are detected in the higher noise regions
-when the read noise is assumed constant across the readout.  
+row-by-row bias issue discussed below (Section~\ref{sec:pattern.row}).
+As a result of this increased noise, more sources are detected in the
+higher noise regions when the read noise is assumed constant across
+the readout.
 
 To mitigate this noise gradient, we constructed an initial set of
@@ -1274 +1278 @@
 
 \subsubsection{Pattern Row}
+\label{sec:pattern.row}
 %% Statistics so I have them written down somewhere
 %% chipProcessedImfile.bg/bg_stdev by filter for XY33 (a good chip)