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09 February 2025
 
  » arxiv » astro-ph/0107147

 Article overview



The local Poisson hypothesis for solar flares
M.S. Wheatland ;
Date 9 Jul 2001
Subject astro-ph
AbstractThe question of whether flares occur as a Poisson process has important consequences for flare physics. Recently Lepreti et al. presented evidence for local departure from Poisson statistics in the Geostationary Operational Environmental Satellite (GOES) X-ray flare catalog. Here it is argued that this effect arises from a selection effect inherent in the soft X-ray observations; namely that the slow decay of enhanced flux following a large flare makes detection of subsequent flares less likely. It is also shown that the power-law tail of the GOES waiting-time distribution varies with the solar cycle. This counts against any intrinsic significance to the appearance of a power law, or to the value of its index.
Source arXiv, astro-ph/0107147
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