Time-domain demodulation of RHESSI light curves

Details Time-domain demodulation of RHESSI light curves Time-domain demodulation of RHESSI light curves

Nov 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002soph..210..213a&link_type=abstract

Solar Physics, v. 210, Issue 1, p. 213-227 (2002).

Physics

4

Scientific paper

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.

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