update cover image

docs/latex/hazy1/hazy1.tex

@@ -41,7 +41,7 @@ Hazy\\
 \begin{figure}
 \begin{center}
 \hspace*{-1cm}
-\includegraphics[clip=on,width=\columnwidth,height=0.6\textheight,keepaspectratio]{cooling-flow-spectrum-hazy1}
+\includegraphics[clip=on,width=\columnwidth,height=0.6\textheight,keepaspectratio]{federico-respini-sYffw0LNr7s-unsplash}
 \end{center}
 \end{figure}
 
@@ -63,16 +63,8 @@ Hazy\\
 \noindent
 {\small
 {\em Cover image:
-The X-ray spectrum of a unit-volume parcel of gas cooling under conditions
-of constant pressure (isobarically) from X-ray temperatures (1~keV), computed
-at three resolving powers.
-In the top panel, the resolving power is comparable the proposed {\it Athena}
-resolving power around 6~keV.
-In the bottom panel, the resolving power is comparable to the {\it Chandra}
-non-dispersive resolving power around 1~keV.
-In the middle panel, the resolving power is at the code default.
-This functionality is new to \Cloudy, and it is described in
-\citet{Chatzikos2015}, and Section~\ref{sec:Cooling-Heating-NonEq} below.
+The dawn of a new day, representing Cloudy's migration between
+development platforms and new development plans. Photo by Federico Respini on Unsplash.
 }
 }
 \clearpage