Time-domain demodulation of RHESSI light curves

被引：5

作者：

Arzner, K ^{[1
]}

机构：

[1] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

来源：

SOLAR PHYSICS | 2002年 / 210卷 / 1-2期

关键词：

D O I：

10.1023/A:1022417825577

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

This paper presents an algorithm to decompose the modulated RHESSI light curves into periodic functions and a smooth function, representing the true (demodulated) time profile of an impulsive source. The decomposition is achieved by optimizing a trade-off between the Poisson likelihood, a smoothness constraint, and conditions on the average grid transmission and the (modulating or non-modulating) background. The algorithm, which operates on the level of count rates and does not require imaging information, is verified by numerical simulations and applied to some early RHESSI data, where - as a preliminary result - several impulsive features on time scales < 4 s may have been identified.

引用

页码：213 / 227

页数：15

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