Broadband X-ray analysis of 1E 1740.7-2942: constraints on spin, inclination and a tentative black hole mass

Abstract

1E 1740.7-2942 is one of the strongest hard X-ray emitters in the Galactic Centre region, believed to be a black hole in a high-mass X-ray binary system. Although extensively studied in X-rays, many aspects about the underlying nature of the system are still unknown. For example, X-ray data analyses of 1E 1740.7-2942 up to date have not yet unveiled the signature of a reflection component, whose modelling could be used to estimate parameters such as the spin of the black hole and inclination of the disc. We report here on the determination of these parameters from the analysis of the reflection component present in a public \textit{NuSTAR} observation which hasn't been subject to any previous study. We include \textit{XMM-Newton} and \textit{INTEGRAL} data to build a combined spectrum, enabling a joint analysis of both the disc and comptonisation components. Results point to a relatively high inclination disc $\gtrsim$ 50${}^{\circ }$ (3 $\sigma$) and a near-maximum speed rotating black hole. The former is in agreement with a previous radio study and the latter is reported here for the first time. Lastly, we follow the methodology of recent efforts to weight black holes with only X-ray spectra and find results that suggest a black hole mass of about 5 M${}_{\odot }$ for 1E 1740.7-2942.

arXiv comment12 pages, 10 figures. accepted by MNRAS for publication

References in corpus (41)

• emcee: The MCMC Hammer
• X-ray Properties of Black-Hole Binaries
• The Nuclear Spectroscopic Telescope Array (NuSTAR) Mission
• Relativistic Shapiro delay measurements of an extremely massive millisecond pulsar
• Broad-band gamma-ray and X-ray spectra of NGC 4151 and their implications for physical processes and geometry
• Improved Reflection Models of Black-Hole Accretion Disks: Treating the Angular Distribution of X-rays
• X-ray reflected spectra from accretion disk models. III. A complete grid of ionized reflection calculations
• Multi-Temperature Blackbody Spectrum of a Thin Accretion Disk around a Kerr Black Hole: Model Computations and Comparison with Observations
• The Two-Phase Pair Corona Model for Active Galactic Nuclei and X-ray Binaries: How to Obtain Exact Solutions
• BlackCAT: A catalogue of stellar-mass black holes in X-ray transients
• The role of the reflection fraction in constraining black hole spin
• The Mass Distribution of Stellar Black Holes
• Peering into the dark side: magnesium lines establish a massive neutron star in PSR J2215+5135
• Broad emission lines for negatively spinning black holes
• A Simple Comptonization Model
• Relativistic Accretion Disk Models of High State Black Hole X-ray Binary Spectra
• X-ray Spectral Formation in a Converging Fluid Flow: Spherical Accretion into Black Holes
• NuSTAR and Suzaku observations of the hard state in Cygnus X-1: locating the inner accretion disk
• NuSTAR and Swift observations of the very high state in GX 339-4: Weighing the black hole with X-rays
• Astrophysical Black Holes: A Compact Pedagogical Review
• The complex accretion geometry of GX 339-4 as seen by NuSTAR and Swift
• Measuring Black Hole Spin via the X-ray Continuum Fitting Method: Beyond the Thermal Dominant State
• Broadband X-ray Spectra of GX 339-4 and the Geometry of Accreting Black Holes in the Hard State
• The Comptonisation of accretion disc X-ray emission: Consequences for X-ray reflection and the geometry of AGN coronae
• Reflection Spectra of the Black Hole Binary Candidate MAXI J1535-571 in the Hard State Observed by NuSTAR
• Do the Spectra of Soft X-ray Transients Reveal Bulk Motion Inflow Phenomenon?
• The Mass of the Black Hole in LMC X-3
• Estimation of Mass of the Black Hole Candidate MAXI J1659-152 using TCAF and POS Models
• Black hole mass determination in the X-ray binary 4U 1630--47: Scaling of spectral and variability characteristics
• Orbital and Super-Orbital Periods of 1E 1740.7-2942 and GRS 1758-258
• The 2004 Outburst of BHC H1743-322: Analysis of spectral and timing properties using the TCAF Solution
• Broadband reflection spectroscopy of MAXI J1535-571 using AstroSat: Estimation of black hole mass and spin
• Unveiling the high energy tail of 1E 1740.7-2942 with INTEGRAL
• 1E 1740.7-2942: temporal and spectral evolution from INTEGRAL and RXTE observations
• NuSTAR and INTEGRAL observations of a low/hard state of 1E1740.7-2942
• The precessing jets of 1E 1740.7-2942
• Chandra imaging spectroscopy of 1E 1740.7 - 2942
• Further studies of 1E 1740.7-2942 with ASCA
• Confirming the thermal Comptonization model for black hole X-ray emission in the low-hard state
• Mass accretion rate of the galactic black hole A0620-00 in its quiescent state
• Tandem Swift and INTEGRAL Data to Revisit the Orbital and Superorbital Periods of 1E 1740.7-2942

Cited by in corpus (11)

• A catalogue of high-mass X-ray binaries in the Galaxy: from the INTEGRAL to the Gaia era
• A Systematic View of Ten New Black Hole Spins
• Systematically Revisiting All NuSTAR Spins of Black Holes in X-Ray Binaries
• The current state of disk wind observations in BHLMXBs through X-ray absorption lines in the iron band
• Jet-ISM Interactions near the Microquasars GRS 1758-258 and 1E 1740.7-2942
• Study of the excess Fe XXV line emission in the central degrees of the Galactic centre using XMM-Newton data
• Quantifying the evidence against a mass gap between black holes and neutron stars
• Broadband X-ray properties of black holes GRS 1758-258 and 1E 1740.7-2942: AstroSat and NuSTAR results
• The population of NuSTAR Black Hole X-ray Binaries
• Empirical correlation between masses of black holes and Wolf-Rayet stars derived from their mass distributions in spectroscopic binaries
• On the behavior of the black hole candidate 1E 1740.7-2942's corona based on long-term INTEGRAL database