论文标题
VLT，Grond和Danish望远镜观察Trappist-1系统中的过渡
VLT, GROND and Danish Telescope observations of transits in the TRAPPIST-1 system
论文作者
论文摘要
Trappist-1是一个超酷矮人，拥有七个已知的过境行星。我们介绍使用Eso La Silla（丹麦1.54-m望远镜和2.2-m MPI望远镜）和Paranal（非常大型望远镜的单位望远镜1）获得的三个望远镜获得的系统的光度法。我们从丹麦望远镜获得了18条光曲线，2.2-m的8曲线和VLT的4曲线。从这些中，我们测量了四个行星（B，C，F，G）的25次中透射率。这些光曲线和中期的时间将有助于确定行星的质量和半径，由于引力相互作用而显示出其过渡时间的变化。
TRAPPIST-1 is an ultra-cool dwarf that hosts seven known transiting planets. We present photometry of the system obtained using three telescopes at ESO La Silla (the Danish 1.54-m telescope and the 2.2-m MPI telescope) and Paranal (Unit Telescope 1 of the Very Large Telescope). We obtained 18 light curves from the Danish telescope, eight from the 2.2-m and four from the VLT. From these we measure 25 times of mid-transit for four of the planets (b, c, f, g). These light curves and times of mid-transit will be useful in determining the masses and radii of the planets, which show variations in their transit times due to gravitational interactions.
