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GRS 1739-278 observed at very low luminosity with XMM-Newton and NuSTAR
F. Fuerst, J. A. Tomsick, K. Yamaoka +19
We present a detailed spectral analysis of XMM-Newton and NuSTAR observations of the accreting transient black hole GRS 1739-278 during a very faint low hard state at ~0.02% of the…
Stronger Reflection from Black Hole Accretion Disks in Soft X-ray States
James F. Steiner, Ronald A. Remillard, Javier A. Garcia +1
We analyze 15,000 spectra of 29 stellar-mass black hole candidates collected over the 16-year mission lifetime of RXTE using a simple phenomenological model. As these black holes v…
Testing the Kerr black hole hypothesis using X-ray reflection spectroscopy
Cosimo Bambi, Alejandro Cardenas-Avendano, Thomas Dauser +2
We present the first X-ray reflection model for testing the assumption that the metric of astrophysical black holes is described by the Kerr solution. We employ the formalism of th…
High-Density Effects in X-ray Reflection Models from Accretion Disks
Javier A. García, Andrew C. Fabian, Timothy R. Kallman +5
Current models of the spectrum of X-rays reflected from accretion disks around black holes and other compact objects are commonly calculated assuming that the density of the disk a…