利用准直光束投影仪精确测量望远镜滤光片带通及其对宇宙学参数的影响
Accurate measurement of telescope filter bandpasses with a Collimated Beam Projector and impact on cosmological parameters
AI总结：
本文研究测光巡天滤光片带通误差对Ia型超新星宇宙学参数测量的偏差影响，并提出利用准直光束投影仪实现每密耳级滤光片透射率精确测量的方法。
摘要：
在测光巡天中使用不同滤光片测量星等，可以获得宇宙学距离和参数。然而，对于当前和未来的大型巡天项目，如ZTF、DES、HSC或LSST，测光校准的不确定度在Ia型超新星宇宙学分析的误差预算中几乎与统计不确定度相当，这限制了我们利用Ia型超新星进行精确宇宙学研究的能力。对巡天滤光片带通的了解达到每密耳（千分之一）水平，有助于实现星等的亚百分比精度。我们展示了带通中心波长认知偏差或带外泄漏的存在如何导致宇宙学测量产生偏差。然后，我们介绍了如何利用准直光束投影仪以所需精度测量滤光片透射率。
英文摘要：
The measurement of magnitudes with different filters in photometric surveys gives access to cosmological distances and parameters. However, for current and future large surveys like the ZTF, DES, HSC or LSST, the photometric calibration uncertainties are almost comparable to statistical uncertainties in the error budget of type Ia cosmology analysis, which limits our ability to use type Ia supernovae for precision cosmology. The knowledge of the bandpasses of the survey filters at the per-mill level can help reach the sub-percent precision for magnitudes. We show how a misknowledge of the bandpasses central wavelengths or of the presence of out-of-band leakages leads to biased cosmological measurements. Then, we present how to measure the filter throughputs at the required precision with a Collimated Beam Projector.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
