Reconstruct light curves from unevenly sampled variability data with artificial neural networks
Reconstruct light curves from unevenly sampled variability data with artificial neural networks
复制标题
使用人工神经网络从不均匀采样的变异性数据重建光变曲线
DOI:
10.1007/s10509-014-1891-1
复制
发表时间:
2014-03
影响因子:
1.9
通讯作者:
Cao Xinwu
中科院分区:
文献类型:
--
作者:
Wang Qi-Jie;Cao Xinwu
Light curves are usually constructed from discrete observational data by interpolation. In most cases, the observation data is temporally uneven, and therefore the light curve is usually derived by the interpolation of the binned data with the spline function, which is intended for reducing the “high sample noise” (i.e., the variability in the timescales comparable with the bin width). Such a practice of course reduces the time resolution of the light curve. It is known that function approximation is one of the most important applications of the artificial neural networks (ANN). In this work, for the first time we tentatively use the ANN to construct light curves from unevenly sampled variability data. To demonstrate the advantages of ANN for signal reconstruction over commonly used cubic spline function scheme, two sets of simulated periodic functions are used with random noises of varying magnitudes, one single frequency based and one multiple (two) frequency based. These signal reconstruction tests show that the ANN is clearly superior to the cubic spline scheme. As a case study, we use the uneven long-term multi-band monitoring data of BL lacertae to derive the light curves with ANN. It is found that the light curves derived with ANN have higher time resolution than those with the cubic spline function adopted in previous works. We recommend using ANN for the signal reconstruction in astrophysical data analysis as well as that of in other fields.
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DOI:
--
发表时间:
1992
期刊:
--
影响因子:
--
作者:
J. Zurada
通讯作者:
J. Zurada
影响因子:
6.5
作者:
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通讯作者:
M. Villata;C. Raiteri;V. Larionov;V. Larionov;V. Larionov;M. Nikolashvili;M. Aller;U. Bach;D. Ca
影响因子:
--
作者:
Qi-jie Wang;D. Liao;Yonghong Zhou;X. Liao
通讯作者:
Qi-jie Wang;D. Liao;Yonghong Zhou;X. Liao
DOI:
10.1086/592598
发表时间:
2008-08
期刊:
The Astrophysical Journal
影响因子:
--
作者:
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通讯作者:
R. Chatterjee;S. Jorstad;S. Jorstad;A. Marscher;Haruki Oh;Haruki Oh;I. McHardy;M. Aller;H. Aller
影响因子:
6.5
作者:
J.H.Fan;B. Qian;J. Tao
通讯作者:
J.H.Fan;B. Qian;J. Tao