Chandra and RXTE Spectroscopy of the Galactic Microquasar XTE J1550-564 in Outburst

Abstract

On two occasions, we obtained nearly simultaneous ~ 4 kilosecond snapshot observations of the Galactic black hole and microquasar XTE J1550-564 with Chandra and RXTE near the peak of its May, 2000 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 relatively hot (kT ~ 0.8 keV) accretion disk and hard (Gamma ~ 2.3) coronal power-law components. Broad, relatively strong Fe K-alpha emission line (EW ~170 eV) and smeared absorption edge components consistent with Fe XXV are strongly required in joint spectral fits. The resolution of the Chandra/HETGS reveals that the broad Fe K-alpha emission lines seen clearly in the individual RXTE spectra are not due to an intrinsically narrow line.

11 pages, 4 figures (2 in color). MNRAS, accepted. Significant updates from the initial version

References in corpus (7)

• Dynamical Evidence for a Black Hole in the Microquasar XTE J1550-564
• Evidence for Spin and Energy Extraction in a Galactic Black Hole Candidate: The XMM-Newton/EPIC-pn Spectrum of XTE J1650-500
• High Frequency Quasi-Periodic Oscillations in the 2000 Outburst of the Galactic Microquasar XTE J1550-564
• X-Ray Observations of XTE J1550-564 During the Decay of the 2000 Outburst - I. Chandra and RXTE Energy Spectra
• X-Ray Observations of XTE J1550-564 During the Decay of the 2000 Outburst - II. Timing
• The 1998 outburst of the X-ray transient XTE J2012+381 as observed with BeppoSAX
• The X-ray Spectrum of the Rapid Burster using the Chandra HETGS

Cited by in corpus (19)

• Relativistic X-ray Lines from the Inner Accretion Disks Around Black Holes
• The Spin of the Black Hole Microquasar XTE J1550-564 via the Continuum-Fitting and Fe-Line Methods
• An Improved Dynamical Model for the Microquasar XTE J1550-564
• An optically thick inner corona geometry for the Very High State Galactic Black Hole XTE J1550-564
• The gas-to-extinction ratio and the gas distribution in the Galaxy
• Spectral evolution of the microquasar XTE J1550-564 over its entire 2000 outburst
• Measuring Black Hole Spin via the X-ray Continuum Fitting Method: Beyond the Thermal Dominant State
• On Relativistic Disk Spectroscopy in Compact Objects with X-ray CCD Cameras
• A dipping black-hole X-ray binary candidate in NGC 55
• On Neutral Absorption and Spectral Evolution in X-ray Binaries
• Parallel tracks in infrared versus X-ray emission in black hole X-ray transient outbursts: a hysteresis effect?
• Chandra reveals a possible ultra-fast outflow in the super-Eddington Be/X-ray binary Swift J0243.6+6124
• Colours of black holes: infrared flares from the hot accretion disc in XTE J1550-564
• Conflicting disk inclination estimates for the black hole X-ray binary XTE J1550-564
• NIR and optical observations of the failed outbursts of black hole binary XTE J1550-564
• XMM-Newton and Broad Iron Lines
• Searching for quantum-gravity footprint around stellar-mass black holes
• Association of the 3:2 HFQPO Pairs with the Broad Fe K Line in XTE J1550-564 and GRO J1655-40
• Strong gravity effects: X-ray spectra, variability and polarimetry