标题： 星系功率谱的乘性误差：精确宇宙学中未知 photometric 系统误差的自校准 显示英文标题

标题： Multiplicative errors in the galaxy power spectrum: self-calibration of unknown photometric systematics for precision cosmology

摘要： 我们开发了一种通用方法，用于针对与光度校准误差相关的系统性问题，“自校准”星系团聚的观测。 我们首先指出校准误差的乘法效应所带来的危险，其中大尺度误差会传播到小尺度，并且即使在宇宙学分析中清理或未使用大尺度信息，也可能具有显著影响。 然后我们提出一种方法来测量任意的大尺度校准误差，并利用这些测量结果来校正最有利于限制大多数宇宙学参数的小尺度（高多极）功率。 我们在合成实例上展示了我们方法的有效性，并简要讨论了它可能如何应用于真实数据。 显示英文摘要

摘要： We develop a general method to "self-calibrate" observations of galaxy clustering with respect to systematics associated with photometric calibration errors. We first point out the danger posed by the multiplicative effect of calibration errors, where large-angle error propagates to small scales and may be significant even if the large-scale information is cleaned or not used in the cosmological analysis. We then propose a method to measure the arbitrary large-scale calibration errors and use these measurements to correct the small-scale (high-multipole) power which is most useful for constraining the majority of cosmological parameters. We demonstrate the effectiveness of our approach on synthetic examples and briefly discuss how it may be applied to real data.