A Tunable Filter for Deep Wide-Field Emission-Line Surveys with Magellan

马里兰-麦哲伦可调滤波器（MMTF）将结合宽视场（10' - 27'）和出色的窄带成像能力，在宽（5000 - 9200埃）带宽。该仪器将安装在位于拉斯坎帕纳斯的6.5米麦哲伦1号望远镜上的宽视场成像光谱仪IMACS上。使用可调谐滤波器进行频率切换，与CCD阵列上电荷的移动同步，通过平均大气和仪器影响的时间变化，将允许宽场发射线调查降低到前所未有的通量极限。MMTF将是第一个大型望远镜上的同类仪器，并将使美国天文学界的很大一部分受益，包括一些博士生。

The Maryland-Magellan Tunable Filter (MMTF) will combine wide field of view (10' - 27') with outstanding narrow-band imaging capabilities over a broad (5000 - 9200 Angstrom) bandwidth. The instrument will be installed in IMACS, the wide-field imaging spectrograph on the 6.5 m Magellan I Telescope at Las Campanas. Frequency switching with the tunable filter, synchronized with movement of the charge on the CCD array, will allow wide-field emission line surveys down to unprecedented flux limits by averaging out temporal variations due to atmospheric and instrumental effects. The MMTF will be the first instrument of its kind on a large telescope, and will benefit a significant fraction of the U.S. astronomical community, including several PhD students.