
\documentstyle[12pt]{article}
\def\baselinestretch{1.0}

\parskip 8pt
\parindent 0.6cm
\textheight 24cm 
\topmargin -1.25cm
\oddsidemargin -0.25cm
\evensidemargin -0.25cm 
\textwidth 16.5cm


\begin{document}

\pagestyle{empty}

%\pagestyle{plain}
%\setcounter{page}{1}

 \normalsize
 \rm

\centerline{\bf APPLICATION OF GSC CATALOGUE TO }

\centerline{\bf MINOR PLANETS PLATE REDUCTION } 

\vspace*{1 cm}
\begin{center}
{\sl L\'opez Garcia A.}$^{(1)}${\sl , Yagudin L.}$^{(2)}${\sl , Mart\'\i nez
Us\'o M.J.}$^{(3)}${\sl \ }\\ {\small (1) Astronomical Observatory\\
Department of Applied Mathematics and Astronomy\\ University of Valencia,
Spain\\(2)Pulkovo Observatory, Russia}\\ {\sl (3) }Department of{\sl \ }%
Mathematics\\ University Jaume I of Castell\'on, Spain

\end{center}

GSC catalogue, corrected of systematic and plate Schmidt errors is applied
to compare more than a thousand minor planets observation with previous PPM
catalogue reductions. One gives differences of right ascension and
declination and internal, external and mean error values for PPM-GSC (non
corrected)-GSC (Corrected).

We apply an automatic reduction process to minor planets observations
obtained at the Valencia Observatory, using both PPM\ and GSC catalogues.

Finally, standard and corrected O-C stars have been applied to small plate
field reductions in order to simulate CCD results.

\end{document}
