\documentclass[11pt]{report}
\usepackage{amssymb,latexsym}


\setlength{\textwidth}{6.5in} 
\setlength{\textheight}{9in}
\setlength{\topmargin}{-0.0625in} 
\setlength{\oddsidemargin}{0in}
\setlength{\evensidemargin}{0in} 
\setlength{\headheight}{0in}
\setlength{\headsep}{0in} 
\setlength{\hoffset}{0in}
\setlength{\voffset}{0in}



\renewcommand{\title}[1]{%
\noindent\textbf{\Large #1}\newline}
\newcommand{\firstauthor}[1]{\normalsize\noindent #1}
\newcommand{\coauthor}[1]{#1 }
\newcommand{\affil}[1]{(\emph{#1})}
\newcommand{\category}[1]{\textsc{category: #1}}

\renewenvironment{abstract}{%
\vspace{\baselineskip}
{\noindent\bfseries\large Abstract}\vspace{0.5\baselineskip}\newline}%
{\vspace{\baselineskip}}

\begin{document}
\pagestyle{empty}

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

%%
%% TITLE
%%

\setlength{\baselineskip}{1.25\baselineskip}
\title{Title here}



%%
%% AUTHOR LIST
%%

%% in the form \firstauthor{f_auth}\affil{affiliation},
%% \coauthor{Name2}\affil{affiliation}, 
%% \coauthor{Name3}\affil{affiliation},...
%%
%% if several authors share an affiliation then the \affil command may
%% be placed after all the author names, e.g.
%%
%% \firstauthor{f_auth},\coauthor{Name2, Name3,...}\affil{common affiliation}
%%
%% to produce ``f_auth, Name2, Name3 (common affiliation)'' 


\firstauthor{}\affil{}
%\coauthor{}\affil{},
%\coauthor{}\affil{},
%\coauthor{}\affil{}



%%
%% ABSTRACT
%%

\begin{abstract}
%%
%%
Abstract here.
%%
%%
\end{abstract}



%%
%% CATEGORY
%%

%%
%% Please uncomment the category you wish to select
%%

\noindent\category{%
%
%Solar System and Misc
%Normal Stars and White Dwarfs
%White Dwarf Binaries and Cataclysmic Variables
%Black Hole and Neutron Star Binaries
%Supernovae, Supernova Remnants and Isolated Neutron Stars
%Normal Galaxies
%Active Galaxies and Quasars
%Clusters of Galaxies
%Galactic Diffuse Emission and Surveys
%Extragalactic Diffuse Emission and Surveys
%
}


\end{document}
