2008•UvA-DARE (University of Amsterdam)Requires access
Kilohertz QPOs, spectral state transitions and the distance to the neutron star X-ray transient IGR J17473-2721
D. Altamirano, Duncan K. Galloway, J. Chenevez, J. J. M. in ’t Zand, Erik Kuulkers, Nathalie Degenaar, Ettore Del Monte, Marco Feroci, Enrico Costa, Yuri Evangelista, M. Falanga, Craig B. Markwardt, Rudy A. D. Wijnands, Michiel van der Klis
Open publisher page 2 citations
Abstract
We report on RXTE monitoring observations of the transient X-ray binary IGR J17473-2721 since the beginning of its latest outburst on March 26th, 2008 (see ATEL #1445, #1459, #1460, #1461 and #1468). IGR J17473-2721 reached a maximum unabsorbed flux of ~1.30E-8 ergs cm-2 s-1 (2-10 keV, assuming nH=3.8e22cm-2, ATEL #1459) on June 22nd, and has been steadily decreasing since. The X-ray spectral state (based on the X-ray colors in the 2-16 keV band) has switched from hard to soft and back to hard.