Gravitational lenses among z>=4.0 quasars
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We report on i-band snapshot observations of 157 Sloan Digital Sky Survey quasars at 4.0
我们报道了157颗红移为4.0的斯隆数字巡天(Sloan Digital Sky Survey)类星体的i波段快照观测结果

We report on i-band snapshot observations of 157 Sloan Digital Sky Survey quasars at 4.0
我们报道了157颗红移为4.0的斯隆数字巡天(Sloan Digital Sky Survey)类星体的i波段快照观测结果