论文标题
从时间顺序数据过滤中删除点源泄漏
Removal of point source leakage from time-order data filtering
论文作者
论文摘要
通常在地图制作前过滤地面CMB实验的时间顺序数据（TOD），以清除或减少地面和大气排放的污染。但是，当观察区包含强点源时，滤波过程将导致测得的CMB图中的点源周围大量泄漏，并留下虚假的极化信号。因此，在CMB科学剥削之前，需要对这些信号进行评估和删除。在这项工作中，我们提出了一种称为“模板拟合”的新方法，并可以有效地删除像素域中的这些泄漏信号，不仅满足了从CMB-$ B $模式测量原始引力波的要求，而且还避免避免在TOD上进行耗时的操作。
Time-ordered data (TOD) from ground-based CMB experiments are generally filtered before map-making to remove or reduce the contamination from the ground and the atmospheric emissions. However, when the observation region contains strong point sources, the filtering process will result in considerable leakage around the point sources in a measured CMB map, and leave spurious polarization signals. Therefore, such signals need to be assessed and removed before CMB science exploitation. In this work, we present a new method that we call "template fitting" and can effectively remove these leakage signals in pixel domain, not only satisfying the requirement for measuring primordial gravitational waves from CMB-$B$ modes, but also avoiding time-consuming operations on TOD.
