Data Mining in Gamma Astrophysics Experiments

Details Data Mining in Gamma Astrophysics Experiments Data Mining in Gamma Astrophysics Experiments

2005-03-24

arxiv.org/abs/astro-ph/0503543v1

Astronomy and Astrophysics

Astrophysics

5 pages, 2 figures, to be published in the Proceedings of the 6th International Symposium ''Frontiers of Fundamental and Compu

Scientific paper

Data mining techniques, including clustering and classification tasks, for the automatic information extraction from large datasets are increasingly demanded in several scientific fields. In particular, in the astrophysical field, large archives and digital sky surveys with dimensions of 10E12 bytes currently exist, while in the near future they will reach sizes of the order of 10E15. In this work we propose a multidimensional indexing method to efficiently query and mine large astrophysical datasets. A novelty detection algorithm, based on the Support Vector Clustering and using density and neighborhood information stored in the index structure, is proposed to find regions of interest in data characterized by isotropic noise. We show an application of this method for the detection of point sources from a gamma-ray photon list.

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