Index: trunk/doc/release.2015/systematics.20140411/systematics.tex
===================================================================
--- trunk/doc/release.2015/systematics.20140411/systematics.tex	(revision 40098)
+++ trunk/doc/release.2015/systematics.20140411/systematics.tex	(revision 40099)
@@ -22,6 +22,6 @@
 \def\plotext{ps}
 
-%\def\picdir{/home/eugene/chipresid.20140404}
-\def\picdir{/data/kukui.2/eugene/chipresid.20140404}
+\def\picdir{/home/eugene/chipresid.20140404}
+%\def\picdir{/data/kukui.2/eugene/chipresid.20140404}
 
 % Pick a terse version of the title here;
@@ -102,10 +102,13 @@
 \section{INTRODUCTION}\label{sec:intro}
 
-
-
-% discuss the science drivers
-% summary concept of paper:
-%% explore the systematic limitations of PS1
-%% connections between astrometric and photometric systematics
+\begin{verbatim}
+* early CCDs were thick, but low resistivity Si had low cross-section to red photons
+* thinning was used to improve the blue sensitivity, at the cost of further reducing the red sensitivity
+* by the early 2000s, high-resistivity Si was used to make thick "deep-depletion" devices with good red and blue response.
+* voltages?
+* sky-scraper pixels
+* Plazas et al and other effects
+* 
+\end{verbatim}
 
 \section{Pan-STARRS1}