Probing the soft state evolution of 4U 1543-47 during its 2021 outburst using AstroSat
arXiv:2307.10831 · doi:10.1093/mnras/stad2204
Abstract
4U 1543-47 underwent its brightest outburst in 2021 after two decades of inactivity. During its decay phase, AstroSat conducted nine observations of the source spanning from July to September , 2021. The first three observations were performed with an offset of 40 arcmin with AstroSat/LAXPC, while the remaining six were on-axis observations. In this report, we present a comprehensive spectral analysis of the source as it was in the High/Soft state during the entire observation period. The source exhibited a disk-dominated spectra with a weak high-energy tail (power-law index ) and a high inner disk temperature (0.84 keV). Modelling the disk continuum with non-relativistic and relativistic models, we find inner radius to be significantly truncated at . Alternatively, to model the spectral evolution with the assumption that the inner disk is at the ISCO, it is necessary to introduce variation in the spectral hardening in the range 1.5-1.9.
arXiv commentAccepted for publication in MNRAS, 10 pages, 7 figures and 2 tables
References in corpus (33)
- The chemical composition of the Sun
- On the Absorption of X-rays in the Interstellar Medium
- X-ray Properties of Black-Hole Binaries
- Modelling the behaviour of accretion flows in X-ray binaries
- The Spin of the Near-Extreme Kerr Black Hole GRS 1915+105
- Radiation mechanisms and geometry of Cygnus X-1 in the soft state
- Multi-Temperature Blackbody Spectrum of a Thin Accretion Disk around a Kerr Black Hole: Model Computations and Comparison with Observations
- Ubiquitous equatorial accretion disc winds in black hole soft states
- Estimating the Spin of Stellar-Mass Black Holes via Spectral Fitting of the X-ray Continuum
- The role of the reflection fraction in constraining black hole spin
- X-ray reflected spectra from accretion disk models. I. Constant density atmospheres
- The Constant Inner-Disk Radius of LMC X-3: A Basis for Measuring Black Hole Spin
- Relativistic Accretion Disk Models of High State Black Hole X-ray Binary Spectra
- On the interpretation of the multicolour disc model for black hole candidates
- Black hole accretion discs: reality confronts theory
- The Accretion Disk Wind in the Black Hole GRO J1655-40
- Calibration of the Large Area X-ray Proportional Counter (LAXPC) instrument on-board AstroSat
- On why the Iron K-shell absorption in AGN is not a signature of the local Warm/Hot Intergalactic Medium
- Multi-Temperature Blackbody Spectra of Thin Accretion Disks With and Without a Zero-Torque Inner Boundary Condition
- Spectral and Timing Evolution of the Black Hole X-ray Nova 4U 1543-47 During its 2002 Outburst
- Large Area X-ray Proportional Counter (LAXPC) Instrument on AstroSat and Some Preliminary Results from its performance in the orbit
- A failed outburst of H1743-322
- Accretion Disk Spectra of the Ultra-luminous X-ray Sources in Nearby Spiral Galaxies and Galactic Superluminal Jet Sources
- Suzaku discovery of iron absorption lines in outburst spectra of the X-ray transient 4U 1630-472
- A Systematic View of Ten New Black Hole Spins
- XMM-Newton and INTEGRAL spectroscopy of the microquasar GRO J1655-40 during its 2005 outburst
- The spin of the black hole 4U 1543-47
- On the energy dependence of the QPO phenomenon in the black hole system MAXI J1535-571
- Wideband Study of the Brightest Black Hole X-ray Binary 4U 1543-47 in the 2021 Outburst: Signature of Disk-Wind Regulated Accretion
- Time-resolved spectroscopy on the heartbeat state of GRS 1915+105 using AstroSat
- Probing the shot behaviour in Cygnus X-1 using simultaneous AstroSat-NICER observation
- Detection of low-frequency breaks in power density spectrum of GX 339-4 in faint low/hard state observations using AstroSat data
- Spectral characteristics of the black hole binary 4U 1957+115: A multi-mission perspective