论文标题
蓝色的弱透镜：平流层观测的违反直觉策略
Weak lensing in the blue: a counter-intuitive strategy for stratospheric observations
论文作者
论文摘要
弱透镜测量值的统计能力主要是由于解决形状的高红移星系的数量而驱动的。传统的智慧和物理直觉表明，通过在长（红色或IR附近）波长的深度成像中进行了优化，以避免失去红移的Balmer断裂和Lyman破裂星系。我们使用合成发射线EL-COSMOS目录来模拟来自各种高度的不同过滤器的镜头观测。这里是使用现成和自定义过滤器的预测实现目标Z> 0.3源密度的暴露次数。在红色波长方面，基于地面的观测很容易更好，因为（更狭窄）是空间的观测值。但是，我们发现，超级位于平流层中的衍射受限的天文台工作，而应在蓝色波长上执行其透镜质量观测。
The statistical power of weak lensing measurements is principally driven by the number of high redshift galaxies whose shapes are resolved. Conventional wisdom and physical intuition suggest this is optimised by deep imaging at long (red or near IR) wavelengths, to avoid losing redshifted Balmer break and Lyman break galaxies. We use the synthetic Emission Line EL-COSMOS catalogue to simulate lensing observations using different filters, from various altitudes. Here were predict the number of exposures to achieve a target z > 0.3 source density, using off-the-shelf and custom filters. Ground-based observations are easily better at red wavelengths, as (more narrowly) are space-based observations. However, we find that SuperBIT, a diffraction-limited observatory operating in the stratosphere, should instead perform its lensing-quality observations at blue wavelengths.
