deletions | additions       diff --git a/header.tex b/header.tex  index 21a7b27..128c35b 100644  --- a/header.tex  +++ b/header.tex 
...
\def\apjs{ApJS }  \def\araa{ARAA }  \def\aap{A\&A }  \def\nat{Nature }  \def\mnras{MNRAS }  \def\rmxaa{RevMexAA }  \def\jrasc{JRASC }   \newcommand{\nat}{Nature}