THE EXTRACTION OF HIGHLY DISTORTED SPECTRA
THE EXTRACTION OF HIGHLY DISTORTED SPECTRA
复制标题
DOI：
10.1086/132570
复制
发表时间：
1989-11
影响因子：
3.5
通讯作者：
T. Marsh
中科院分区：
文献类型：
--
作者：
T. Marsh
通过在目标轮廓上施加适当的权重，可以以最大信噪比提取点源的数字光谱。计算这些权重的第一阶段涉及确定福尔斯每个像素的对象的通量的分数。现阶段公布的方法各不相同，没有一种方法能够科普某些常见的数据类型。本文提出了一种改进的拟合目标轮廓的方法，它特别适合于提取由交叉色散器和像管采集的数据所产生的倾斜和畸变的光谱。
Digital spectra of point sources can be extracted with maximum signal-to-noise ratio by applying appropriate weights across the profile of the object. The first stage in computing these weights involves determination of the fraction of the flux of the object which falls into each pixel. The published methods differ at this stage, and none can cope with some commonly available types of data. An improved method for fitting the object profile is presented, which is particularly suited to the extraction of tilted and distorted spectra, as produced by data taken with cross dispersers and image tubes.