Unveiling the temporal properties of MAXI J1820+070 through AstroSat observations

Abstract

We present here the results of the first broadband simultaneous spectral and temporal studies of the newly detected black hole binary MAXI J1820+070 as seen by SXT and LAXPC on-board AstroSat.The observed combined spectra in the energy range 0.7-80 keV were well modeled using disk black-body emission, thermal Comptonization and a reflection component. The spectral analysis revealed that the source was in its hard spectral state (Gamma=1.61) with a cool disk (kTin=0.22 keV). We report the energy dependent time-lag and root mean squared (rms) variability at different frequencies in the energy range 3-80 keV using LAXPC data. We also modeled the flux variability using a single zone stochastic propagation model to quantify the observed energy dependence of time-lag and fractional rms variability and then compared the results with that of Cygnus X-1. Additionally, we confirm the detection of a quasi-periodic oscillation with the centroid frequency at 47.7 mHz.

arXiv commentAccepted for publication in Astrophysical Journal Letters (ApJL). The article contains 8 pages, 4 figures and 1 Table. Missing reference added. Some typos corrected

References in corpus (33)

• On the Absorption of X-rays in the Interstellar Medium
• Advection-Dominated Accretion: A Self-Similar Solution
• Advection-Dominated Accretion and the Spectral States of Black Hole X-Ray Binaries: Application to Nova Muscae 1991
• The May 1989 outburst of the Soft X-ray Transient GS 2023+338 (V404 Cyg)
• RXTE Observation of Cygnus X-1: II. Timing Analysis
• X-ray reverberation around accreting black holes
• BlackCAT: A catalogue of stellar-mass black holes in X-ray transients
• On the X-ray time lags in the black hole candidates
• The flux-dependent amplitude of broadband noise variability in X-ray binaries and active galaxies
• States and transitions in black-hole binaries
• The corona contracts in a black-hole transient
• A physical model for the continuum variability and QPO in accreting black holes
• Calibration of the Large Area X-ray Proportional Counter (LAXPC) instrument on-board AstroSat
• An exact analytic treatment of propagating mass accretion rate fluctuations in X-ray binaries
• Modelling variability in black hole binaries: linking simulations to observations
• Gaia DR2 Distances and Peculiar Velocities for Galactic Black Hole Transients
• Long Term Variability of Cyg X-1, II. The rms-Flux Relation
• ASASSN-18ey: The Rise of a New Black-Hole X-ray Binary
• X-ray and Optical Monitoring of State Transitions in MAXI J1820+070
• The Ubiquity of the rms-flux relation in Black Hole X-ray Binaries
• A New Model for the Hard Time Lags in Black Hole X-Ray Binaries
• Testing the Propagating Fluctuations Model with a Long, Global Accretion Disk Simulation
• A Physical Model for the Spectral-Timing Properties of Accreting Black Holes
• AstroSat/LAXPC observation of Cygnus X-1 in the hard state
• Modelling hard and soft state of Cygnus X-1 with propagating mass accretion rate fluctuations
• Modelling the cross-spectral variability of the black hole binary MAXI J1659-152 with propagating accretion rate fluctuations
• Modeling The X-ray Timing Properties Of Cygnus X-1 As Caused By Waves Propagating In A Transition Disk
• THE EVOLUTION OF ACCRETION DISKS WITH CORONAE: A MODEL FOR THE LOW-FREQUENCY QUASI-PERIODIC OSCILLATIONS IN X-RAY BINARIES
• Non-Linear Dynamics of Accretion Disks with Stochastic Viscosity
• Breaking the spectral degeneracies in black hole binaries with fast timing data
• A stochastic propagation model to the energy dependent rapid temporal behaviour of Cygnus X-1 as observed by AstroSat in the hard state
• Broad-band spectral study of X-ray transient MAXI J1820+070 using Swift/XRT and NuSTAR
• Modeling the response of a standard accretion disc to stochastic viscous fluctuations

Cited by in corpus (15)

• Measuring fundamental jet properties with multi-wavelength fast timing of the black hole X-ray binary MAXI J1820+070
• A spectral study of the black hole X-ray binary MAXI J1820+070 with AstroSat and NuSTAR
• Variability and phase lags of the type-C quasi-periodic oscillation of MAXI J1348-630 with NICER
• On the energy dependence of the QPO phenomenon in the black hole system MAXI J1535-571
• A timing-based estimate of the spin of the black hole in MAXI J1820+070
• AstroSat Observations of the first Galactic ULX Pulsar Swift J0243.6+6124
• Broadband Spectral and Timing Properties of MAXI J1348-630 using AstroSat and NICER Observations
• Accretion Scenario of MAXI J1820+070 during 2018 Outbursts with Multi-mission Observations
• Synchronous X-ray/Optical QPOs from the Black Hole LMXB MAXI J1820+070
• Science with the $AstroSat$ Soft X-ray Telescope: an overview
• LAXPC instrument onboard AstroSat: Five exciting years of new scientific results specially on X-ray Binaries
• AstroSat observation of rapid Type-I thermonuclear burst from the low mass X-ray binary GX 3+1
• AstroSat Science Support Cell
• Ultraviolet spectroscopy of the black hole X-ray binary MAXI J1820+070 across a state transition
• Evidence for coronal temperature variation in Seyfert 2 ESO 103--035 using NuSTAR observations