We present light curve solutions of the W UMa-type eclipsing binary OGLE-GD-ECL-04451, observed by both the \emph{Optical Gravitational Lensing Ex-periment} (\emph{OGLE}) program in 2006 and the \emph{Antarctica Survey Telescope} (\emph{AST3-1}) in 2012 at Dome A. We analyzed this binary system with the Wilson-Devinney(W-D) method 2013 version and derived the mass ratio q=2.91±0.07, the inclination i=76.86∘±0.23∘, and the light variattion amplitud was 0m.51 based on the \emph{OGLE} data. From the \emph{AST3-1}'s data, we find that the amplitude dropped to 0m.44(2012) and the difference of magnitudes of the two light maxima is 0m.03. A hot spot was then added on the surface of the secondary to demonstrate the amplitude change and O'Conell effect of the binary system.
@article{arxiv.1602.01552,
title = {Light Curve Solutions of an Eclipsing Binary OGLE-GD-ECL-04451 with a Dramatic Change in Amplitude},
author = {Li Gang and Zhang yanping and Fu jianning},
journal= {arXiv preprint arXiv:1602.01552},
year = {2016}
}