Bibcode
Miller, J. M.; Marshall, H. L.; Wijnands, R.; Di Matteo, T.; Fox, D. W.; Kommers, J.; Pooley, D.; Belloni, T.; Casares, J.; Charles, P. A.; Fabian, A. C.; van der Klis, M.; Lewin, W. H. G.
Bibliographical reference
Monthly Notice of the Royal Astronomical Society, Volume 338, Issue 1, pp. 7-13.
Advertised on:
1
2003
Citations
27
Refereed citations
22
Description
On two occasions, we obtained nearly simultaneous ~=4 ks snapshot
observations of the Galactic black hole and microquasar XTE J1550-564
with Chandra and RXTE near the peak of its 2000 May outburst. The
low-energy sensitivity of Chandra and the resolution of the High Energy
Transmission Grating Spectrometer (HETGS), coupled with the broad energy
range and large collecting area of RXTE, have allowed us to place
constraints on the outburst accretion flow geometry of this source in
the `intermediate' X-ray state. The 0.65-25.0 keV continuum spectra are
well described by a relatively hot (kT~= 0.8 keV) accretion disc and
hard (Γ~= 2.3) coronal power-law components. Broad, relatively
strong Fe Kα emission line (WKα~= 170 eV) and
smeared absorption edge components consistent with FeXXV are strongly
required in joint spectral fits. The resolution of the Chandra/HETGS
reveals that the broad Fe Kα emission lines seen clearly in the
individual RXTE spectra are not the result of an intrinsically narrow
line.