%%% Astron. Nachrichten, instructions for authors coding with LaTeX2e. V2005.1
%%% -MWL- 2006-01-13 auf Verlagswunsch wieder altes Bibliographie-Format
%%% -MWL- 2007-04-01 Durch dilettantische L\"{o}schungen in diesem 
%%%         File zerfallenen Umbruch repariert; eine Seite weniger
%%% -MWL- 2007-05-07 BibTeX-Anleitung und \changed erg\"{a}nzt
%%% 
%%% -mst- 2015-06-09 Instructions for Keywords, Citations, References, 
%%%                  BibTeX revised. Several additional minor changes.
%%%
\documentclass[mathleft,fleqn,%
% final,%
% earlyview,%
]{an}
%
% define AMS packages here if needed:
%\usepackage{amsmath}
%
\usepackage{graphicx}
\usepackage[varg]{txfonts}
\overfullrule5pt
% natbib and bibtex users uncomment the following two lines
%\usepackage{natbib}
%\bibpunct{(}{)}{;}{a}{}{,}
%
\setlength{\mathindent}{0pt} 
%
% do not use special macros like \hyperref, \longtable, etc.
%
\sloppy

\begin{document}

% The following seven commands are intended for editorial usage and
% should be ignored by the author(s).
\Pagespan{1}{}% Document's page range. 
% If second parameter is left empty, the last page is computed
% automatically.
\Yearpublication{2014}%
\Yearsubmission{2014}%
\Month{0}%   
\Volume{999}%  
\Issue{0}% 
\DOI{asna.201400000}% 


\title{Astronomische Nachrichten -- \\
        Instructions for authors using \LaTeXe\ markup\,\thanks{Data
from STELLA}}

\author{T.\,H.\,E. Editor\inst{1}\fnmsep\thanks{Corresponding author:
        {the.author@some.org}}
% Example for footnote, note the usage of the \texttt{fnmsep} command
% as separator between institute number and footnote mark}
\and  G.\,H. Ostwriter\inst{2,3}
}
\titlerunning{Instructions for authors}
\authorrunning{T.\,H.\,E. Editor \& G.\,H. Ostwriter}
\institute{
The affiliation of the first author, The Citadel, Oldtown, Westeros
\and 
The first affiliation of the second author, Unseen University, Ankh-Morpork, DW
\and 
The second affiliation of the second author, Hogwards, UK}

\received{XXXX}
\accepted{XXXX}
\publonline{XXXX}

\keywords{List -- of -- keywords -- separated -- by -- dashes}

\abstract{%
  This article gives instructions for authors of {\it Astronomische
  Nachrichten} (AN) how to prepare an article according to the current
  \LaTeX\ class. The source code of this paper may be used by the
  authors of AN as a template. For further information about the
  journal, its publisher, its editorial and advisory boards, please
  look at the World Wide Web (URL
  {http:/\slash{}www.aip.de\slash{}AN/}) where this text and
  accompanying class files can be obtained from.}

\maketitle


\section{Introduction}
In order to ensure that papers received for publication from different
authors are consistent in format, style, and quality, authors are required
to type their manuscripts according to the following instructions.
The editors will modify the electronic manuscripts if necessary to ensure
that they conform to these standards.

\section{\LaTeX\ markup commands}
Authors using \LaTeX\ are requested to use the \verb"an" document 
class. It was derived from the \verb+article.cls+  class 
based on \TeX\ version 3.14159 and \LaTeXe. Hence formulae
and text are typed using the standard \LaTeX\ commands.

A copy of the class file, the \LaTeX\ source of this template file as well as
its PostScript-version are available via the web-pages of the editorial 
office of AN at the Astrophysical Institute Potsdam
(www.aip.de/AN) or on request via 
e-mail from the editor ({\it AN@aip.de}).

\subsection{Preamble}
The first piece of markup in the manuscript must declare the class of the 
document.
\begin{quote}
\verb"\documentclass{an}"
\end{quote}
The \verb"\documentclass" command must appear first in any \LaTeX\ file, and 
this one specifies the document class to be the \texttt{an} class which uses 
ten point fonts. The font used by AN will be the \verb+txfonts+
font. It is defined by the 
\begin{quote}
  \verb+\usepackage[varg]{txfonts}+
\end{quote}
 command following the 
\verb+\documentclass+ command. If the corresponding 
font-package is not available to authors, paper submission is also 
possible using the ``times'' or \linebreak ``roman'' font, which is not too 
different from the tx font as far as page layout etc.~is concerned. 

%\pagebreak%%%%%%%%%%%%%%%%%

The body of the text is embraced by the usual
\begin{quote}
\verb"\begin{document}"\\
{\it body of text}\\
\verb"\end{document}"
\end{quote}
commands which identify the beginning and end of the main portion of 
the manuscript.

\subsection{Layout of the heading section (Title, Author(s), Abstract, etc.)}
The  following  sequence of \LaTeX\ commands defines completely 
the heading section of the paper
\begin{quote}
  \verb"\Pagespan{"\textit{first}\verb"}{"\textit{last}\verb"}"\\%
  \verb"\Yearpublication{"\textit{Year of publication}\verb"}"\\%
  \verb"\Yearsubmission{"\textit{Year of submission}\verb"}"\\%
  \verb"\Month{"\textit{Month of publication}\verb"}"\\%   
  \verb"\Volume{"\textit{Volume}\verb"}"\\%  
  \verb"\Issue{"\textit{Issue}\verb"}"\\% 
  \verb"\DOI{"\textit{DOI}\verb"}"\\% 
  \verb"\title{"{\it The title}\verb+}+\\
  \verb"\author{"{\it A.N. Author}\verb"}"\\
  \verb"\institute{"{\it The Author's Institute}\verb+}+\\
  \verb"\received{"\textit{R-date}\verb"}"
  \verb"\accepted{"\textit{A-date}\verb"}"\\
  \verb"\publonline{"\textit{P-date}\verb"}"\\
  \verb"\keywords{"{\it list of keywords}\verb"}"\\
  \verb"\abstract{"{\it Text of abstract}\verb"}"\\
  \verb"\maketitle"
\end{quote}
The first seven commands of these are intended for editorial usage and
should be ignored by the author(s). They set publishing data for the
headline of the first page. \verb"\Pagespan" takes two numerical
parameters indicating the article's first and last page number. If the
second parameter is empty, the number of the last page will be
calulated automatically. The names of the next five commands
\verb"\Yearpublication", \verb"\Yearsubmission", \verb"\Month",
\verb"\Volume", and \verb"\Issue" are pretty self-explaining and fall
back to place holder values if omitted. \verb"\DOI" will set the DOI
number or, if left empty, remind to ``please set DOI!''.

Title and author identification are generated with the standard
\LaTeX\ commands \verb"\title" and \verb"\author". The authors name
will be type-set using the \textbf{boldface} font. Next the author's
affiliation is given using the \verb+\institute+ command. Some of the
authors may have alternate affiliations. Both affiliations can be
defined in the \verb+\institute+ command separated by an
\begin{quote}
  \verb+\and+
\end{quote}
command and are referenced using the 
\begin{quote}
  \verb+\inst+
\end{quote}
 command following the corresponding
author(s).  In addition, the use of the 
\begin{quote}
  \verb+\thanks+
\end{quote}
 command is possible in order to
acknowledge use of an observatory or similar.

The commands \verb"\received", \verb"\accepted", and\linebreak%%%
\verb"\publonline" typeset the document's publishing date(s).  If some data is unknown,
the corresponding command is supposed to be omitted.

Should the paper have more than one author, include the co-author(s)
name(s) in the \verb+\author+ and \verb+\institute+ commands. Use only
the \verb+\and+ command as separator. The present address or the
current e-mail address of the corresponding author(s) are defined also
via the the
% \begin{quote}
  \verb+\thanks+
% \end{quote}
 command.

A total of up to five keywords characterizing the main topics 
of the paper can be specified. These shall be selected from the list
of keywords which is accessible
via the WWW-page of AN. Keywords are defined using the \verb+\keywords+ command.

Next the abstract of your paper is to be be given. 
Abstracts are required for all papers. 
Your abstract must be given using the 
\verb+\abstract+ command. Empty lines are not allowed within 
the summary. If you wish to break lines, 
use double backslashes \verb+\\+ instead.

The heading section is closed 
with the \verb+\maketitle+ command.

\subsection{Table of contents}

Presumably for long articles, a table of contents can be included automatically giving the
command 
\begin{quote}
  \verb+\tableofcontents+
\end{quote}
immediately following \verb+\begin{document}+.

\subsection{Sectioning}

The \texttt{an} class supports three levels of sectioning,
sections, subsections and subsubsections. 
If you wish to  open a new chapter, type 
\begin{quote}
  \verb+\section{+{\it title of section}\verb+}+.
\end{quote}
The 
\begin{quote}
  \verb+\subsection+ \quad and\\
  \verb+\subsubsection+
\end{quote}
 commands  
open subsections of different levels. These 
commands delimit sections by marking their \emph{beginnings}, respectively;
there are no separate commands to identify the \emph{ends.}

There is no capitalization in the titles of sections and subsections
except for proper names.

If one wishes to have an acknowledgements section, the 
\begin{quote}
  \verb+\acknowledgements+
\end{quote}
command will do. The text of the acknowledgement shall be typed thereafter. 
There is no separate command to identify the end of the acknowledgements.

Appendices can be defined using the \verb+appendix+ environment. Individual 
parts of an appendix can be separated with the \verb+\section+ command. They
will be ``numbered'' with capital letters A, B, C \ldots.

\subsection{Figures}
Authors are welcome to include their figures and graphics as 
PostScript-files using the \texttt{graphicx} package.
The name of the corresponding package
must be defined immediately following the \verb+\documentclass+ command
using e.g.~\verb+\usepackage{graphicx}+.

The standard width of a figure in AN is equal to the width of one
column. The figure caption is set below the figure. Please note, that
the height of characters and digits in the finally printed manuscript
must not be smaller than 2\,mm. The standard way for inclusion of a
PostScript file then looks like this:
\begin{quote} 
\verb+\begin{figure}+\\
\verb+{\includegraphics[option]{+{\it file}\verb+}+\\
\verb+\caption{Caption text +\texttt{\ldots}\verb+}+\\
\verb+\label{label_for_figure}+\\
\verb+\end{figure}+\\
\end{quote}
where {\it file} is the name (without extension, e.g., \texttt{.eps})
of the file to be included. A number of options defined in square
brackets help to correctly position and size your figure.\linebreak
These include parameters specifying e.g.~the \texttt{height}, the
\texttt{width}, the \texttt{angle} or the BoundingBox \texttt{bb}. For
details on that see the \emph{Guide to using graphics in \LaTeX} by
David Carlisle, provided for example by the Comprehensive TeX Archive
Network (CTAN) at ftp:/\slash{}ftp.dante.de\slash{}tex-archive\slash
macros\slash{}latex\slash{}required\slash
graphics\slash{}grfguide.pdf. Note that all Figures and Tables should be
identified by the \verb+\label{...}+ definition, placed within or after 
the \verb+\caption{...}+ macro.

\begin{figure}
\includegraphics[width=\linewidth,height=28mm]{empty}
\caption{The caption of a figure shall describe the content of the figure.
An exception is granted only to the Editor and its ghostwriter, who
demonstrate the usage of this command.}
\label{label1}
\end{figure}

A large figure spanning significantly more than one column shall be embraced by
the  \verb+\begin{figure*}+ and \verb+\end{figure*}+ commands.

If you cannot provide your figure as encapsulated Post\-Script file 
(but have glossy prints or photos instead), 
leave appropriate space at the desired location in the
text using the \verb+\vspace+ command in the  \texttt{figure} environment.
Place your \verb+\caption+ as shown in the above example inside the 
environment.

Reproduction of color images on paper carries an extra charge. Costs
are subject to changes and depend on how much color art is present in
a particular issue; an estimate will be given upon request. It should
be noted that a certain level of color shift during the reproduction
process will have to be accepted by the author. There is no limit for
publication of color images in the electronic version of the paper via
Wiley Interscience ({www.interscience.wiley.com}). We encourage the
authors to make intensive use of this feature.

\subsection{Movies}
As a novel feature AN offers the opportunity to publish movies 
in a refereed journal. Publication of the movies happens together with
the electronic version of the paper via Wiley Interscience 
({www.interscience.wiley.com}). Submission of the movie requires 
upload to the Web-pages of AN (see {www.aip.de/AN} for further 
instructions). The movies will be reviewed by our referees. 

\subsection{Tables}
All tables shall be typeset with horizontal rules only. Vertical rules
shall be used only in exceptional cases for the sake of clarity.
Tables should be accompanied by preceding captions. Secondary
information can be given as a footnote to the table. Column headings
label the entries in the column and should consist of one or two
words, with the first letter of each word capitalized. Units of table
entries should be placed in parentheses immediately below the column
headings. It is strongly suggested to assign \LaTeX-labels to the
table and to refer to individual tables in the text using the
\verb+\ref{label_for_table}+ command in order not to\linebreak%%%%%%%
lose the correct numbering if changes of the text occur.
Note that the \verb+\longtable+ macro is not supported.
Table~\ref{tlab} shows an example.

\begin{table}
% \centering%%%
\caption{Example of a well organized table.}
\label{tlab}
\begin{tabular}{cc}\hline
Quantity 1 & Quantity 2\\ 
(unit1) & (unit2) \\
\hline
1 & 2 \\
3 & 4\\
\hline
\end{tabular}
\end{table}

\subsection{Mathematics}
Formulae shall preferentially typeset using the \verb+equation+
environment, which guarantees automatic numbering of the formulae. The
use of the \verb+\ref+-\verb+\label+-scheme within the environment is
strongly recommended, see the following Eq.\,(\ref{useless-equation}),
which is complete nonsense:
% 
\begin{equation}
  \label{useless-equation}
  \int_{-\infty}^{\infty} \det x \,\mathrm{d}x 
  = \sum_{n=-a}^{a} \log (x \star  \sqrt[\sin{x}]{a})\,. 
\end{equation}
% 
Punctuate a displayed equation in the same way as ordinary text.
Extensive mathematical calculations shall be put into an appendix (see
below). To optimize typesetting long formulae in narrow columns, the
\texttt{an} class supports an option \texttt{mathleft}; using that,
displayed math will start at the leftmost position in the column. The
same effect is done for single formulae by setting \verb+\mathindent+
locally to zero length:
%
{\setlength{\mathindent}{0pt}%%% 
\begin{equation}
  \label{another-useless-equation}
  \prod_{n=-\zeta}^{\zeta} \zeta^{\exp{n}}  
  = \coprod_{m=-z}^{z}  \sin a^z \cos b^z \tan c^z \sec d^z \ldots\,. 
\end{equation}}% 


In math mode \LaTeX{} treats all letters as though they were
mathematical or physical variables; hence they are typeset in italics.
However, any textual elements within formulae should be set in roman
by using the 
\begin{quote}
  \verb+\mathrm+ \verb+{text in roman}+
\end{quote}
 feature.
Roman should also be used for subscripts and superscripts \emph{in
formulae} where these are merely labels and not in themselves variables,
e.g. 
\begin{quote}
  \verb+$T_{\mathrm{eff}}+ \verb+= 5\times 10^{9}$\,K+
\end{quote}
produces $T_{\mathrm{eff}} = 5\times 10^{9}$\,K. However, do not use roman
if the subscripts or superscripts represent variables, e.g.\
$\sum_{i=1}^{n} a_{i}$.

Please ensure that \emph{physical units} (e.g.\ pc, erg s$^{-1}$ K,
cm$^{-3}$, W m$^{-2}$ Hz$^{-1}$, m kg s$^{-2}$ A$^{-2}$) and {\em
abbreviations} such as Ord, Var, GL, SL, sgn, const.\ are always set in
roman type with an appropriate inter-word spacing. 
Names of common mathe\-matical functions, such as log,
sin, exp, max and sup shall be coded as \verb|\log|,
\verb|\sin|, \verb|\exp|, \verb|\max|, \verb|\sup| and will then
automatically appear in roman.

In order to distinguish ``d'' used as the ``differential sign'' and
``e'' used as the ``exponential function'' from normal variables, set
these letters in roman if used in this context.

Chemical symbols and formulae should be set in roman, e.g.\ Fe not $Fe$,
H$_{2}$O not {\em H$_{2}$O\/}, H$\alpha$ not {\em H${\alpha}$}.

A minus-sign in the normal text shall nevertheless be set between
\$-signs and not just as a dash, otherwise it will not be recognized as
mathematical symbol.

Special A\&A macros like, e.g., \verb|\la|, \verb|\ga|, \verb|\farcs|,
are supported (see Table C.4 in the A\&A author's guide for further 
explanation and additional useful definitions). 

%%%
%%% -MWL- 2006-01-13 auf Verlagswunsch wieder altes Bibliographie-Format
%%% 
{\sloppy 
\subsection{References}
The system to be followed for literature citations in the text 
is the standard one of the main 
astronomical journals. Hence, 
references should be cited by giving the last name of the
author and the date of publication, e.g., (Author 2001). 
Note that there is no
comma before the date. Papers by two authors should be cited by giving the
last names of both authors, joined by an ampersand, and the date, e.g.,
(Author1 \& Author2 2001). Again there is no comma before the date.
%Papers by three authors should be cited by giving
%the last names of all three authors on the first citation and 
%the name of the first author followed by et al.~thereafter, e.g., 
%(Author1, Author2 \& Author3 2001) at the first citation and 
%(Author1 et al.~2001) in subsequent citations. 
Papers by three or more authors should always be cited 
by giving the last name of the first author followed by et al.~and the year
of publication (Author1 et al.~2001).

Text references are placed in parentheses unless the author's name is
part of the sentence, e.g., (Author et al.~2001) but {\it 
as Author1 et al.~(2001) have shown}. 
If two or more papers are cited within a single set of
parentheses, the citations should be separated by a semicolon: 
(Author1 \& Author2 2001; Author3 1997).
If two or more papers by the same author(s) are
cited within a single set of parentheses, the dates of the papers should be
separated by a comma: (Author1 1997, 2001). Papers by the same author(s)
published in the same year should be distinguished by appending a, b, c,
etc., to the date: e.g., AnAuthor (1997a, 1997b). Parentheses are
omitted around the date if the reference appears in a table or in a note to
a table.

All sources cited in the text (including work in progress) must appear
in the reference section at the end of the paper and vice versa all
entries in the reference section should be cited in the text.
Reference entries should be ordered alphabetically, starting with the
last name of the first author, followed by the first author's
initial(s), and similarly for each additional author. For papers with
more than five authors, the last name and initials of the first three
authors should be listed, with the names of subsequent authors
replaced by a comma and et al., but the paper should be alphabetically
positioned as it would be if the names of the all authors appeared.
Multiple entries for one author or one group of authors should be
ordered chronologically. There are commas between name(s) and
initials, no comma before and a comma after the year of publication,
and a comma between the name of a journal and the volume number.
Journal names shall be abbreviated following the recommendations
collected at http://adsdoc.harvard.edu/abs\_doc/refereed.html. The following
macros can be used for journal names:

\overfullrule0pt
\begin{quote}
\verb+\mnras for {MNRAS}+\\
\verb+\aas for {A\&AS}+\\
\verb+\aj for {AJ}+\\
\verb+\apj for {ApJ}+\\
\verb+\apjl for {ApJ}+\\
\verb+\apjs for {ApJS}+\\
\verb+\baas for {BAAS}+\\
\verb+\pasp for {PASP}+\\
\verb+\pasj for {PASJ}+\\
\verb+\araa for {ARA\&A}+\\
\verb+\an for {AN}+\\
\verb+\apss for {Ap\&SS}+\\
\verb+\aap for {A\&A}+\\
\verb+\aaps for {A\&AS}+\\
\let\astap=\aap
\verb+\aapr for {A\&A~Rev.}+\\
\verb+\actaa for {Acta Astron.}+\\
\verb+\ao for {Appl.~Opt.}+\\
\verb+\aplett for {Astrophys.~Lett.}+\\
\verb+\apspr for {Astrophys.~Space~Phys.~Res.}+\\
\verb+\azh for {AZh}+\\
\verb+\bac for {Bull. astr. Inst. Czechosl.}+\\
\verb+\bain for {Bull.~Astron.~Inst.~Netherlands}+\\
\verb+\caa for {Chinese Astron. Astrophys.}+\\
\verb+\cjaa for {Chinese J. Astron. Astrophys.}+\\
\verb+\fcp for {Fund.~Cosmic~Phys.}+\\
\verb+\gca for {Geochim.~Cosmochim.~Acta}+\\
\verb+\grl for {Geophys.~Res.~Lett.}+\\
\verb+\iaucirc for {IAU~Circ.}+\\
\verb+\icarus for {Icarus}+\\
\verb+\jcap for {J. Cosmology Astropart. Phys.}+\\
\verb+\jcp for {J.~Chem.~Phys.}+\\
\verb+\jgr for {J.~Geophys.~Res.}+\\
\verb+\jqsrt for {J.~Quant.~Spec.~Radiat.~Transf.}+\\
\verb+\jrasc for {JRASC}+\\
\verb+\memras for {MmRAS}+\\
\verb+\memsai for {Mem.~Soc.~Astron.~Italiana}+\\
\verb+\na for {New A}+\\
\verb+\nar for {New A Rev.}+\\
\verb+\nat for {Nature}+\\
\verb+\nphysa for {Nucl.~Phys.~A}+\\
\verb+\pasa for {PASA}+\\
\verb+\physrep for {Phys.~Rep.}+\\
\verb+\physscr for {Phys.~Scr}+\\
\verb+\planss for {Planet.~Space~Sci.}+\\
\verb+\pra for {Phys.~Rev.~A}+\\
\verb+\prb for {Phys.~Rev.~B}+\\
\verb+\prc for {Phys.~Rev.~C}+\\
\verb+\prd for {Phys.~Rev.~D}+\\
\verb+\pre for {Phys.~Rev.~E}+\\
\verb+\prl for {Phys.~Rev.~Lett.}+\\
\verb+\procspie for {Proc.~SPIE}+\\
\verb+\qjras for {QJRAS}+\\
\verb+\rmxaa for {Rev. Mexicana Astron. Astrofis.}+\\
\verb+\skytel for {S\&T}+\\
\verb+\solphys for {Sol.~Phys.}+\\
\verb+\sovast for {Soviet~Ast.}+\\
\verb+\ssr for {Space~Sci.~Rev.}+\\
\verb+\zap for {ZAp}+\\
\end{quote}
\overfullrule5pt

For creation of a reference list code as in the following example, 
for a sample output see below:
\setlength{\overfullrule}{0pt}
\begin{quote}
\verb+\begin{thebibliography}{}+\\
\verb+\bibitem{} Author1, A.B. \& +\\
\verb+     Author2, C.D. 2001, \an, 322, 1+\\
\verb+\bibitem{} Author3, E.F., Author4, G.H., +\\
\verb+     \& Author5, I. 2001, \aap, 322, 10+\\
\verb+\bibitem{} Author5, I. 2001, +\\
\verb+     \mnras, 322, 20 +\\
\verb+\bibitem{} Author6, J. 2001, +\\
\verb+     \apj, 322, 30 +\\
\verb+\end{thebibliography}+\\
\end{quote}
\setlength{\overfullrule}{5pt}
}% end sloppy


\subsection*{Making bibliographies using Bib\TeX{} and an.bst}


% At the end of this file you see an example bibliography which
% represents the journalŐs reference style. Please format your real
% bibliography accordingly.

Optionally, you may generate your bibliography using Bib\TeX{}, with the
bib-style-file an.bst from the template package in your \LaTeX{} search
path. To this end, replace the example database-file \texttt{an-demo.bib} with
your own existing one, or alternatively use it as a template for
generating your new database. The following code in your manuscript
source file enables Bib\TeX{}-functionality:
% 
\begin{quote}
\texttt{\textbackslash{}bibliographystyle\{an\}}\\
\texttt{\textbackslash{}bibliography\{<}\emph{database-filename}\texttt{>\}}
\end{quote}
% 
You then need to run your manuscript source file through Bib\TeX{} using
the command 
% 
\begin{quote}
\mbox{\texttt{bibtex <}\emph{filename}\texttt{>}}
\end{quote}
% 
(most \TeX{} frontends have a shortcut for this) and afterwards
through \LaTeX{} twice, in order to get the correct label numbering.

\paragraph{Important:} Before
sending your manuscript source file to the publisher, remember to
transfer the actual, fully formatted bibliography contained in the
Bib\TeX{}-generated file \mbox{\texttt{<}\emph{filename}\texttt{>.bbl}}
to your manuscript source~file.


\section{General recommendations}
We recommend to pay attention to the following general hints
in order to avoid some common errors or inconsistencies:
\begin{itemize}
\item[--]
Acronyms and abbreviations should be spelled out the first time they
     are used unless they are common throughout the discipline. Terms
     defined in the abstract should be defined independently in the main
     text.
%\item[2]
%Chemical symbols should be in roman type, not italics. The mass number
%     precedes the symbol, e.g., $^\mathrm{12}$C.
\item[--]
Standard abbreviations for SI units (e.g., m, km, mm) or natural units
     (e.g., A.U., parsec, cm) should be used. If English units such as
     inches or pounds per square inch are used, metric equivalents should be
     given in parentheses.
\item[--]
Dates should be written in the order: year, month, and day; e.g., 2001
     January 1; the month being written in full, except in tables, where the
     standard three-letter abbreviations are used without a period.
\item[--]
In text, a sentence should not begin with a symbol or number.  If that can't be
     avoided, reference tags have to be preceded by the word ``Reference''.
\item[--] 
In a series of three or more items, a comma should be used to separate
% \pagebreak
     each item, and a comma is used before the last two items in the series,
     e.g., {\it space, time, and matter}.
\item[--]
The word {\it data} is plural and therefore takes a plural verb.
\end{itemize}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\subsection{Change marks}

Please use for changes requested by the referee the following colour change option:
\begin{changed}
  This is a text snippet marked as \emph{changed}. 
  This is
  done by enclosing it in an environment called \verb+changed+. Please note
  that in certain circumstances there might be small side effects such
  as make up deviations or additional blanks.
\end{changed}


\acknowledgements
  We appreciate the cooperation with the authors of AN. Based on
  photographic data obtained using The UK Schmidt Telescope. The UK
  Schmidt Telescope was operated by the Royal Observatory Edinburgh,
  with funding from the UK Science and Engineering Research Council,
  until 1988 June, and thereafter by the Anglo-Australian Observatory.
  Original plate material is copyright (c) the Royal Observatory
  Edinburgh and the Anglo-Australian Observatory. The plates were
  processed into the present compressed digital form with their
  permission. The Digitized Sky %%%\linebreak\newpage\noindent%%%%%
  Survey was produced at the Space Telescope Science Institute under
  US Government grant \mbox{NAG\,W-2166}.

  
% Example of using BiBTeX (plus natbib):
% For details see \cite{1999MNRAS.309..731B},
% \cite{1893PASP....5..204C},
% \cite{2008IAUS..252...75L}. It has been demonstrated that this
% is important \citep{2012AN....333..663S}.


% Use this code if you wish to generate your bibliography with BibTeX;
% please replace first the string "an-demo" below with the name(s) of
% the BibTeX data base(s) you want to use.
% The resulting bibliography-output (the contents of the .bbl file)
% must be pasted into this file before submission.
% 
%\bibliographystyle{an}
%\bibliography{an-demo}
% 
% Replace the following example bibliography with your references
% before submission:
\begin{thebibliography}{}
  \bibitem{} Author1, A.B. \& Author2, C.D. 2001, \an, 322, 1
  \bibitem{} Author3, E.F., Author4, G.H., \& Author5, I. 2001, \aap, 322, 10
  \bibitem{} Author5, I. 2001, \mnras, 322, 20
  \bibitem{} Author6, J. 2001, \apj, 322, 30
\end{thebibliography}

\appendix

\section{This is the title of the first appendix}
Larger tables, collections of images, spectra or similar kind of data shall be 
presented in the appendix section rather than in the main body of the 
text. Several appendices can be separated by the \verb+\section{+{\it title
of appendix}\verb+}+ command. They are enclosed in the 
\verb+appendix+ environment.

\end{document}


