Kilohertz QPOs, spectral state transitions and the distance to the neutron star X-ray transient IGR J17473-2721.

Details Kilohertz QPOs, spectral state transitions and the distance to the neutron star X-ray transient IGR J17473-2721. Kilohertz QPOs, spectral state transitions and the distance to the neutron star X-ray transient IGR J17473-2721.

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008atel.1651....1a&link_type=abstract

The Astronomer's Telegram, #1651

Astronomy and Astrophysics

Astronomy

6

X-Ray, Binaries, Neutron Stars, Transients

Scientific paper

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.

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