Advice on how to use the MNRAS LaTeX class file mnras.cls, version 3.0

In June 2015 MNRAS released version 3.0 of the LaTeX class file mnras.cls for preparing papers. However, this is mangled in various ways, with the instructions/template provided not being consistent with the mnras.cls file.

So, here is some advice/hints about how to use this new MNRAS class file.

Here is what I used at the start of my last MNRAS paper.

   \documentclass[fleqn,usenatbib,usedcolumn]{mnras}
%==============================================================================%
\usepackage[british]{babel}             % British English hyphenation
\usepackage{newtxtext}                  % Good fonts
\usepackage[slantedGreek]{newtxmath}    %   "    "   (slanted Greek)
%
\let\la=\lesssim % for less than similar from newtxmath, not \la from mnras.cls
%
\usepackage[T1]{fontenc}                % Good font encoding
\usepackage{graphicx}                   % Including figures
%
...
\begin{document}
...


Notes:

• Do not use the a4paper or usegraphicx options for mnras.cls, but load the graphicx package explicitly.
• I use the newtx packages (i.e. newtxtext and newtxmath) for nice fonts, with the slantedGreek option to ensure all greek letters are slanted, as is appropriate for variables (non-slanted greek letters are available, e.g. $\muup$ to give a micro prefix for units).
• As I have loaded the newtx packages, I reset \la to point to the amssymb-named character that is defined by newtxmath, not the one in mnras.cls.
• The usedcolumn loads the dcolumn package which is useful to align table columns by decimal places (mnras.cls defines three new column types, d', .' and ,' as per the first page of the documentation for the dcolumn package).
Also note that, with pdfLaTeX, you are likely to get warnings such as warning (ext4): destination with the same identifier (name{figure.1}) has been already used, duplicate ignored'' (as the hyperref package is loaded too early by the mnras.cls file). Such warnings can be ignored.

Previously I provided advice about how to change various things to submit an MNRAS paper to arXiv, as arXiv was running a rather old LaTeX implementation, which did not have the newtx font packages. But from early 2017 arXiv has been running TeX Live 2016, which does include newtx, which makes it much simpler to submit a MNRAS paper to arXiv.

Still, I'd recommend the following.

• Put \pdfoutput=1 as the first line of your .tex file. This forces .pdf output.
• Included a \hypersetup{...} line, after your last \usepackage{...}, something like
   \hypersetup{pdfauthor={D. A. Green},
pdftitle={Constraints on the distribution of supernova

   \setlength\topmargin{-2pc}
`