On reverberation mapping lag uncertainties
On reverberation mapping lag uncertainties
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DOI：
10.1093/mnras/stz3464
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发表时间：
2019-09
影响因子：
4.8
通讯作者：
Z. Yu;C. Kochanek;B. Peterson;B. Peterson;Y. Zu;W. Brandt;E. Cackett;M. Fausnaugh;I. McHardy
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作者：
Z. Yu;C. Kochanek;B. Peterson;B. Peterson;Y. Zu;W. Brandt;E. Cackett;M. Fausnaugh;I. McHardy
我们广泛地探讨了系统误差对标枪和内插互相关函数（ICCF）方法的混响映射滞后不确定性估计的影响。我们专注于模拟光变曲线从五个集中监测活动星系核的光变曲线的随机实现。即使存在系统误差，这两种方法通常也能很好地工作，尽管标枪通常提供更好的误差估计。估计不足的光变曲线不确定性对ICCF方法的影响较小，因为与标枪不同，它没有明确假设高斯统计。这两种方法都不敏感的随机过程中的变化驱动的连续或相关的线光变曲线的连续的传递函数。我们认为唯一会导致重大问题的系统误差是，如果线光变曲线不是连续光变曲线的平滑和移动版本，而是包含一些额外的可变性来源。
We broadly explore the effects of systematic errors on reverberation mapping lag uncertainty estimates from javelin and the interpolated cross-correlation function (ICCF) method. We focus on simulated light curves from random realizations of the light curves of five intensively monitored AGNs. Both methods generally work well even in the presence of systematic errors, although javelin generally provides better error estimates. Poorly estimated light-curve uncertainties have less effect on the ICCF method because, unlike javelin , it does not explicitly assume Gaussian statistics. Neither method is sensitive to changes in the stochastic process driving the continuum or the transfer function relating the line light curve to the continuum. The only systematic error we considered that causes significant problems is if the line light curve is not a smoothed and shifted version of the continuum light curve but instead contains some additional sources of variability.