Multiwavelength observations revealing the evolution of the outburst of the black hole XTE J1118+480

Abstract

We report multiwavelength observations of the soft X-ray transient (SXT) XTE J1118+480, which we observed with UKIRT, HST, RXTE, EUVE and many other instruments and facilities. Adding radio (Ryle Telescope, VLA), sub-millimeter (JCMT) and X-ray (Chandra and SAX) data from the literature, we assembled the most complete spectral energy distribution (SED) of this source yet published. We followed the evolution of this source for 1 year, including 6 observations performed during the outburst, and one observation at the end of the outburst. Because of XTE J1118+480's unusually high galactic latitude, it suffers from very low extinction, and its SED is near-complete, including EUV (Extreme Ultraviolet) observations. XTE J1118+480 exhibits an unusually low low-hard state (estimated inner radius 350Rs) and a strong non-thermal contribution in the radio to optical domain, which is likely to be due to synchrotron emission. We discuss the interstellar column density and show that it is low, between 0.80 and 1.30 x 10^20 cm-2. We analyse the evolution of the SED during the outburst, including the contributions from the companion star, the accretion disc, the outflow, and relating irradiation and variability of the source in different bands to the SED. We find no significant spectral variability during the outburst evolution, consistent with the presence of a steady outflow. Analysis of its outflow to accretion energy ratio suggests that the microquasar XTE J1118+480 is analogous to radio-quiet quasars. This, combined with the inverted spectrum from radio to optical, makes XTE J1118+480 very similar to other microquasar sources, e.g. GRS 1915+105 and GX 339-4 in their low/hard state. We model the high-energy emission with a hot disc model, and discuss different accretion models for XTE J1118+480's broad band spectrum.

arXiv comment17 pages, 13 figures, accepted for publication in MNRAS

References in corpus (41)

• Advection-Dominated Accretion: A Self-Similar Solution
• On the Fate of Gas Accreting at a Low Rate onto a Black Hole
• A jet model for the broadband spectrum of XTE J1118+480: Synchrotron emission from radio to X-rays in the Low/Hard spectral state
• Powerful jets from black hole X-ray binaries in Low/Hard X-ray states
• The Formation and Structure of a Strongly Magnetized Corona above Weakly Magnetized Accretion Disks
• Convection-Dominated Accretion Flows
• Self-Similar Accretion Flows with Convection
• A relativistic jet from Cygnus X-1 in the low/hard X-ray state
• Hydrodynamical Non-radiative Accretion Flows in Two-Dimensions
• X-ray irradiation in low mass binary systems
• Broad-band X-ray/gamma-ray spectra and binary parameters of GX 339-4 and their astrophysical implications
• Coronal outflow dominated accretion discs: a new possibility for low luminosity black holes?
• X-ray spectra of accretion discs with dynamic coronae
• Modeling the Low State Spectrum of the X-Ray Nova XTE J1118+480
• A high-velocity black hole on a Galactic-halo orbit in the solar neighborhood
• Self-Consistent Thermal Accretion Disk Corona Models for Compact Objects: II. Application to Cygnus X-1
• The X-ray transient XTE J1118+480: Multiwavelength observations of a low-state mini-outburst
• Complete and Simultaneous Spectral Observations of the Black-Hole X-ray Nova XTE J1118+480
• The remarkable rapid X-ray, ultraviolet, optical, and IR variability in the black hole XTE J1118+480
• The very flat radio - millimetre spectrum of Cygnus X-1
• Broad band spectrum of Cygnus X-1 in two spectral states with BeppoSAX
• A Black Hole of > 6 Solar Masses in the X-ray Nova XTE J1118+480
• The Evolving Accretion Disc in the Black Hole X-ray Transient XTE J1859+226
• Numerical Simulations of Convective Accretion Flows in Three Dimensions
• Initial low/hard state, multiple jet ejections and X-ray/radio correlations during the outburst of XTE J1859+226
• Thermal synchrotron radiation and its Comptonization in compact X-ray sources
• The Halo Black-Hole X-ray Transient XTE J1118+480
• Spectral evidence for a powerful compact jet from XTE J1118+480
• Detection of superhumps in XTE J1118+480 approaching quiescence
• The UV line spectrum of the soft X-ray transient XTE J1118+480: a CNO processed core exposed
• Electron-Positron Outflows from Gamma-Ray Emitting Accretion Discs
• A measurement of the broad-band spectrum of XTE J1118+480 with BeppoSAX and its astrophysical implications
• Magnetic flares and the optical variability of the X-ray transient XTE J1118+480
• Accretion-ejection instability in magnetized disks: Feeding the corona with Alfven waves
• Optical Spectroscopy Of The X-Ray Transient XTE J1118+480 In Outburst
• Accretion-ejection instability and QPO in black-hole binaries.II. Relativistic effects
• Spectral differences between the radio-loud and radio-quiet low-hard states of GRS 1915+105: possible detection of synchrotron radiation in X-rays
• USA and RXTE Observations of a Variable Low-Frequency QPO in XTE J1118+480
• Study of the Largest Multiwavelength Campaign of the Microquasar GRS 1915+105
• A search for possible interactions between ejections from GRS 1915+105 and the surrounding interstellar medium
• Extremely Weak Reflection Features in the X-ray Spectrum of XTE J1118+480: Possible Evidence for X-ray-Emitting Jets?

Cited by in corpus (82)

• Hot Accretion Flows Around Black Holes
• Modelling the behaviour of accretion flows in X-ray binaries
• A Global Spectral Study of Black Hole X-ray Binaries
• Global optical/infrared - X-ray correlations in X-ray binaries: quantifying disc and jet contributions
• An Accretion-Jet Model for Black Hole Binaries: Interpreting the Spectral and Timing Features of XTE J1118+480
• X-ray irradiation in XTE J1817-330 and the inner radius of the truncated disc in the hard state
• The radio/X-ray domain of black hole X-ray binaries at the lowest radio luminosities
• Understanding the Very High-Energy Emission from Microquasars
• Swift Observations of the Cooling Accretion Disk of XTE J1817-330
• Jet spectral breaks in black hole X-ray binaries
• Hot accretion flow in black hole binaries: a link connecting X-rays to the infrared
• Simultaneous multiwavelength observations of the Low/Hard State of the X-ray transient source SWIFT J1753.5-0127
• The variability plane of accreting compact objects
• Constraining Jet/Disk Geometry and Radiative Processes in Stellar Black Holes XTE J1118+480 and GX 339-4
• A failed outburst of H1743-322
• On the Lack of Thermal Emission from the Quiescent Black Hole XTE J1118+480: Evidence for the Event Horizon
• Modelling spectral and timing properties of accreting black holes: the hybrid hot flow paradigm
• A Remarkable Low-Mass X-ray Binary within 0.1 pc of the Galactic Center
• The origin and fate of short-period low-mass black-hole binaries
• Doughnut strikes sandwich: the geometry of hot medium in accreting black hole X-ray binaries
• An overview of jets and outflows in stellar mass black holes
• Internal shocks at the origin of the flat spectral energy distribution of compact jets
• A physical interpretation of the variability power spectral components in accreting neutron stars
• A Model for Emission from Jets in X-ray Binaries: Consequences of a Single Acceleration Episode
• Near-infrared jet emission in the microquasar XTE J1550-564
• Modeling the hard states of XTE J1550--564 during its 2000 outburst
• The Mass of the Black Hole in XTE J1118+480
• On the variation of black hole accretion disc radii as a function of state and accretion rate
• Bimodal spectral variability of Cygnus X-1 in an intermediate state
• A Global Study of the Behaviour of Black Hole X-ray Binary Discs
• On the Origin of Ultraviolet Emission and the Accretion Model of Low-luminosity AGNs
• Multiwavelength spectral and high time resolution observations of SWIFT J1753.5-0127: new activity?
• Overview of an Extensive Multi-wavelength Study of GX 339-4 during the 2010 Outburst
• Further Evidence for Variable Synchrotron Emission in XTE J1118+480 in Outburst
• Spectra of black-hole binaries in the low/hard state: from radio to X-rays
• Studying the X-ray hysteresis in GX 339-4: the disc and iron line over one decade
• The flux-dependent rms variability of X-ray binaries in the optical
• Constraints on Relativistic Jets in Quiescent Black Hole X-ray Binaries from Broadband Spectral Modeling
• Polarised infrared emission from X-ray binary jets
• Parallel tracks in infrared versus X-ray emission in black hole X-ray transient outbursts: a hysteresis effect?
• The evolving polarised jet of black hole candidate Swift J1745-26
• Lorentz Factors of compact jets in Black hole X-ray binaries
• The 1989 and 2015 outbursts of V404 Cygni: a global study of wind-related optical features
• Bright mini-outburst ends the 12-year long activity of the black hole candidate Swift J1753.5-0127
• An inhomogeneous lepto-hadronic model for the radiation of relativistic jets. Application to XTE J1118+480
• Doppler and modulation tomography of XTE J1118+480 in quiescence
• Hard X-ray emission of the microquasar GX 339-4 in the low/hard state
• Modeling of non-stationary accretion disks in X-ray novae A 0620-00 and GRS 1124-68 during outburst
• On the Radio/X-ray Correlation in Microquasars
• The 2005 outburst of the halo black hole X-ray transient XTE J1118+480
• Discovery of a broad iron line in the black-hole candidate Swift J1753.5-0127, and the disk emission in the low/hard state revisited
• ULTRACAM observations of the black hole X-ray transient XTE J1118+480 in quiescence
• Disentangling jet and disc emission from the 2005 outburst of XTE J1118+480
• Expanding hot flow in the black hole binary SWIFT J1753.5-0127: evidence from optical timing
• Colours of black holes: infrared flares from the hot accretion disc in XTE J1550-564
• Thermal emission from the stellar-mass black hole binary XTE J1118+480 in the low/hard state
• Properties of the Black Hole Candidate XTE J1118+480 with the TCAF solution during its Jet Activity Induced 2000 Outburst
• Long-term multi-wavelength studies of GRS 1915+105 I. A high-energy and mid-infrared focus with RXTE, INTEGRAL, and Spitzer
• A long-term optical - X-ray correlation in 4U 1957+11
• Detailed Radio to Soft Gamma-ray Studies of the 2005 Outburst of the New X-ray Transient XTE J1818-245
• On the Origin of the Radio/X-Ray Luminosity Correlation in Black Hole Candidates
• Optical/near-infrared observations of the black hole candidate XTE J1720-318: from high-soft to low-hard state
• Optical, J, and K light curves of XTE J1118+480 = KV UMa: the mass of the black hole and the spectrum of the non-stellar component
• Observations of the quiescent X-ray transients GRS 1124-684 (=GU Mus) and Cen X-4 (=V822 Cen) taken with ULTRACAM on the VLT
• Optical and Near-Infrared Spectroscopy of the Black Hole Swift J1753.5-0127
• Disentangling the NIR/optical emission of the black hole XTE J1650-500 during outburst
• Unidentified gamma-ray sources off the Galactic plane as low-mass microquasars?
• X-ray nova MAXI J1828-249. Evolution of the broadband spectrum during its 2013-2014 outburst
• Accretion Flow Properties of XTE J1118+480 During Its 2005 Outburst
• Infrared study of H1743-322 in outburst: a radio-quiet and NIR-dim microquasar
• Modeling the Broadband Spectral Energy Distribution of the Microquasars XTE J1550-564 and H 1743-322
• Jet disc coupling in black hole binaries
• Quenched millimetre emission from Cygnus X-1 in a soft X-ray state
• A Study of the Variation of Geometry of Accretion Flows of Compact Objects through Timing and Spectral Analysis of Their Outbursts
• Evolution of low-mass binaries with black-hole components
• Investigating the nature of IGR J17454-2919 using X-ray and Near-Infrared observations
• A model for the polarization of the high-energy radiation from accreting black holes: the case of XTE J1118+480
• The Accretion-Ejection Connection in the Black Hole X-ray Binary MAXI J1820$+$070
• Tracking optical variability and outflows across the accretion states of the black hole transient MAXI J1820+070
• Effect of magnetic flux advection on the dynamics of shock in accretion flow around a rotating black hole
• Jet-Disc coupling in the accreting black hole XTEJ1118+480
• Broad-band spectral energy distribution of the X-ray transient Swift J1745-26 from outburst to quiescence