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arXiv 1802.09014astro-ph.COastro-ph.GAgr-qc
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由SNLS弱透镜数据重建收敛功率谱

Reconstruction of Convergence power spectrum from SNLS weak lensing data

Ayan Mitra, Barun Kumar Pal, Supratik Pal

摘要:

我们利用实空间关联函数技术从超新星放大数据中估计透镜会聚功率谱。在我们的分析中,我们利用了来自5年超新星遗产调查的296颗超新星在弱透镜极限。我们使用的数据由四个不同的补丁组成,每个补丁覆盖了几乎1平方度的天空,合并在一起。我们证明,这是很有可能有一个很好的估计,从这个数据的收敛功率谱。我们的主要目的是从SNLS弱透镜数据中提取有意义的信息,并演示如何从中重建收敛的功率谱,而不进入错误的本质,尽管我们在这个过程中做了一些误差分析。

英文摘要:

We estimate the lensing convergence power spectrum from supernovae magnification data using real space correlation function technique. For our analysis we have utilized 296 supernovae from 5-year Supernovae Legacy Survey in the weak lensing limit. The data we used consists of measurements from four different patches, each of them covers almost 1 square degree of the sky, merged together. We demonstrate that it is quite possible to have a good estimate of the convergence power spectrum from this data. Our primary intention is to extract meaningful informations from SNLS weak lensing data and to demonstrate how the power spectrum for convergence can be reconstructed therefrom, without going into the nitty-gritty of errors, although we have done some error analysis in the process.

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。

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