Madam– a map-making method for CMB experiments

Madam– a map-making method for CMB experiments
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Madam——CMB实验的制图方法

DOI：
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发表时间：
2004
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通讯作者：
T. Poutanen
T. Poutanen
中科院分区：
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文献类型：
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作者：
E. Keihänen;E. Keihänen;H. Kurki;T. Poutanen

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本文提出了一种新的宇宙微波背景辐射（CMB）测图方法。该方法是基于去噪技术，但它也利用有关噪声频谱的信息。仪器噪声流的低频分量被建模为一组简单基函数的叠加，其幅度通过涉及幅度协方差矩阵的最大似然分析来确定。我们目前的仿真结果与1/f噪声，并示出了减少的残余噪声相对于普通的踩。本研究与普朗克低频仪器（LFI）活动有关。
We present a new map-making method for cosmic microwave background (CMB) measurements. The method is based on the destriping technique, but it also utilizes information about the noise spectrum. The low-frequency component of the instrument noise stream is modelled as a superposition of a set of simple base functions, whose amplitudes are determined by means of maximum-likelihood analysis, involving the covariance matrix of the amplitudes. We present simulation results with 1/f noise and show a reduction in the residual noise with respect to ordinary destriping. This study is related to Planck Low Frequency Instrument (LFI) activities.