标题： Lensview：用于建模分辨率引力透镜图像的软件 显示英文标题

标题： Lensview: Software for modelling resolved gravitational lens images

摘要： 我们开发了一种新的软件工具Lensview，用于建模分辨的引力透镜图像。 基于LensMEM算法，该软件使用最大熵约束找到最佳拟合的透镜质量模型和源亮度分布。 该方法可以与任何点扩散函数或透镜模型一起使用。 我们回顾了该算法并引入了一些重要的改进。 我们还研究并讨论了与模型及其参数统计不确定性相关的议题，以及源平面大小和源像素大小的问题。 我们在模拟的光学和射电数据上测试了该软件，以评估透镜模型可以恢复的程度以及准确性如何。 对于光学数据，透镜模型参数通常可以以优于1%的精度恢复，并且质量椭圆度和幂律之间的退化减少。 对于射电数据，我们发现由于使用处理过的射电图而不是原始数据（visibilities），产生的系统误差与随机误差大致相同。 因此，在图像空间中分析射电数据仍然是有用的和有意义的。 该软件使用简单的椭圆等温透镜模型应用于光学弧HST J15433+5352和射电环MG1549+3047。 对于HST J15433+5352，爱因斯坦半径为0.525" ± 0.015，可能包括来自邻近星系的显著汇聚贡献。 对于MG1549+3047，模型具有爱因斯坦半径1.105" ± 0.005和核心半径0.16" 0.03。 在临界半径内包含的总质量为7.06 x 10^{10}太阳质量，这是我们的最佳模型。 显示英文摘要

摘要： We have developed a new software tool, Lensview, for modelling resolved gravitational lens images. Based on the LensMEM algorithm, the software finds the best fitting lens mass model and source brightness distribution using a maximum entropy constraint. The method can be used with any point spread function or lens model. We review the algorithm and introduce some significant improvements. We also investigate and discuss issues associated with the statistical uncertainties of models and model parameters and the issues of source plane size and source pixel size. We test the software on simulated optical and radio data to evaluate how well lens models can be recovered and with what accuracy. For optical data, lens model parameters can typically be recovered with better than 1% accuracy and the degeneracy between mass ellipticity and power law is reduced. For radio data, we find that systematic errors associated with using processed radio maps, rather than the visibilities, are of similar magnitude to the random errors. Hence analysing radio data in image space is still useful and meaningful. The software is applied to the optical arc HST J15433+5352 and the radio ring MG1549+3047 using a simple elliptical isothermal lens model. For HST J15433+5352, the Einstein radius is 0.525" +/- 0.015 which probably includes a substantial convergence contribution from a neighbouring galaxy. For MG1549+3047, the model has Einstein radius 1.105" +/- 0.005 and core radius 0.16" 0.03. The total mass enclosed in the critical radius is 7.06 x 10^{10} Solar masses for our best model.