标题： HE 1104-1805的时间延迟首次估计 显示英文标题

标题： First estimate of the time delay in HE 1104-1805

摘要： 我们首先报告了对明亮双类星体和引力透镜HE 1104-1805五年光谱测光监测的初步结果。 类星体在此期间发生了显著变化，而发射线流量似乎保持不变。 我们为组件A和B构建了单色连续谱光变曲线，发现B的变异性领先。 使用Pelt方法进行定量分析，得出光行时延迟的最佳估计约为0.73年，尽管0.3以下的值尚不能排除。 我们讨论了类星体-透镜配置的可能模型，并利用我们测量的时间延迟来预测透镜的红移z_d。 发现最可能的z_d < 1，因此可以排除以前 favoured 的z_d = 1.32或1.66的值。 一个新的候选者是在z=0.73的吸收系统，但透镜也可能是未在吸收中检测到的椭圆星系。 显示英文摘要

摘要： We present first results from five years of spectrophotometric monitoring of the bright double QSO and gravitational lens HE 1104-1805. The quasar has varied considerably over this time, while the emission line fluxes appear to have remained constant. We have constructed monochromatic continuum light curves for components A and B, finding that B leads the variability. A quantitative analysis with the Pelt method gives a best estimate for the light travel time delay of about 0.73 years, although a value as low as 0.3 cannot yet be excluded. We discuss possible models for the QSO-lens configuration and use our measured time delay to predict the redshift of the lens, z_d. Finding that most likely z_d < 1, we can rule out the hitherto favoured values of z_d = 1.32 or 1.66. A new candidate is an absorption system at z=0.73, but the lens could also be an elliptical not detected in absorption.