The Wide Field Imager Lyman-Alpha Search (WFILAS) for galaxies at redshift ~5.7 ***

We report the spectroscopic confirmation of a compact Lyαemitting galaxy at $z=5.721$. A FORS2 spectrum of the source shows a strong asymmetric line with a flux of $5\times 10^{-17}$erg s-1cm-2, making it one of the brightest Lyαemitting galaxies at this redshift, and a line-of-sight velocity dispersion of 400 km s-1. We also have a tentative detection of a second, narrower component that is redshifted by 400 km s-1with respect to the main peak. A FORS2 image shows that the source is compact, with a FWHMof 0$\farcs$5, which corresponds to 3.2 kpc at this redshift. This source is a brighter example of J1236.8+6215([CITE], ApJ, 570, 92), another Lyαemit ting galaxy at $z\sim5.2$.