We report on INTEGRAL observations performed during the 2004 outburst of the bright black hole transient GX 339-4. We analysed IBIS and JEM-X public data starting on 9th August and lasting about one month. During this period GX 339-4 showed spectral state transitions. In order to seek for variability patterns, a principal component analysis (PCA) has been used.
@article{arxiv.astro-ph/0611107,
title = {Spectral variability modes of GX 339-4 in a hard-to-soft state transition},
author = {M. Del Santo and J. Malzac and P. Ubertini and T. Belloni},
journal= {arXiv preprint arXiv:astro-ph/0611107},
year = {2008}
}
Comments
5 pages, 6 figures, accepted for publication in the proceedings of VI Microquasar workshop: Microquasar and Beyond, 18-22 September 2006 in Como (Italy), eds: T. Belloni et al. (2006)