Spectral State Transitions of the Ultraluminous X-ray Source IC 342 X-1

Abstract

We observed the Ultraluminous X-ray Source IC 342 X-1 simultaneously in X-ray and radio with Chandra and the JVLA to investigate previously reported unresolved radio emission coincident with the ULX. The Chandra data reveal a spectrum that is much softer than observed previously and is well modelled by a thermal accretion disc spectrum. No significant radio emission above the rms noise level was observed within the region of the ULX, consistent with the interpretation as a thermal state though other states cannot be entirely ruled out with the current data. We estimate the mass of the black hole using the modelled inner disc temperature to be $30{\mathrm{M}}_{\odot }\lesssim M\sqrt{\cos i}\lesssim 200{\mathrm{M}}_{\odot }$ based on a Shakura-Sunyaev disc model. Through a study of the hardness and high-energy curvature of available X-ray observations, we find that the accretion state of X-1 is not determined by luminosity alone.

arXiv comment10 pages, 5 Figures. MNRAS: Accepted 2014 July 22

References in corpus (49)

• X-ray Properties of Black-Hole Binaries
• A fundamental plane of black hole activity
• A Scheme to Unify Low-Power Accreting Black Holes - Jet-Dominated Accretion Flows and the Radio/X-Ray Correlation
• The Nature of Accreting Black Holes in Nearby Galaxy Nuclei
• Super-critically accreting stellar-mass black holes as ultraluminous X-ray sources
• The Nature of Ultra-Luminous Compact X-Ray Sources in Nearby Spiral Galaxies
• The Ultraluminous State
• Super-Eddington Fluxes from Thin Accretion Disks?
• XMM-Newton observations of the brightest Ultraluminous X-ray sources
• Chandra High-Resolution Camera Observations of the Luminous X-Ray Source in the Starburst Galaxy M82
• Masses, Beaming and Eddington Ratios in Ultraluminous X-ray Sources
• Slim Disk Model for Ultra-Luminous X-Ray Sources
• The ultraluminous X-ray sources NGC 1313 X-1 and X-2: a broadband study with NuSTAR and XMM-Newton
• High Resolution Imaging of the HeII lambda 4686 Emission Line Nebula Associated with the Ultraluminous X-Ray Source in Holmberg II
• Radio Detections During Two State Transitions of the Intermediate Mass Black Hole HLX-1
• Spectral variability of ultraluminous X-ray sources
• Bright radio emission from an ultraluminous stellar-mass microquasar in M31
• Comptonization in Super-Eddington Accretion Flow and Growth Timescale of Supermassive Black Holes
• Discovery of Spectral Transitions from Two Ultra-Luminous Compact X-Ray Sources in Ic342
• Accretion Disk Spectra of the Ultra-luminous X-ray Sources in Nearby Spiral Galaxies and Galactic Superluminal Jet Sources
• A giant radio flare from Cygnus X-3 with associated Gamma-ray emission
• Investigating slim disk solutions for HLX-1 in ESO 243-49
• Spectral States and Evolution of Ultraluminous X-ray Sources
• The unusual supernova remnant surrounding the ultraluminous X-ray source IC 342 X-1
• Black Hole Powered Nebulae and a Case Study of the Ultraluminous X-ray Source IC342 X-1
• The Broadband XMM-Newton and NuSTAR X-ray Spectra of Two Ultraluminous X-ray Sources in the Galaxy IC 342
• Chandra observations of five ultraluminous X-ray sources in nearby galaxies
• The missing link: a low mass X-ray binary in M31 seen as an ultraluminous X-ray source
• A Photoionized Nebula Surrounding and Variable Optical Continuum Emission from the Ultraluminous X-Ray Source in NGC 5408
• Spectral variability of Ultra Luminous Compact X-ray Sources in Nearby Spiral Galaxies
• X-ray spectral evolution in M33 X-8
• Unveiling recurrent jets of the ULX Holmberg II X-1: evidence for a massive stellar-mass black hole?
• X-ray spectral variability in the ultraluminous X-ray source Holmberg IX X-1
• Do Ultraluminous X-ray Sources Really Contain Intermediate-mass Black Holes?
• Optical Counterpart of the Ultraluminous X-ray Source IC 342 X-1
• Ultra Luminous X-ray Sources: a deeper insight into their spectral evolution
• Optical Counterparts of Ultra Luminous X-ray Sources
• Optical Counterparts of Ultraluminous X-Ray Sources
• Suzaku Observations of M82 X-1 : Detection of a Curved Hard X-ray Spectrum
• X-ray spectral state is not correlated with luminosity in Holmberg II X-1
• XMM-Newton Spectra of Intermediate-Mass Black Hole Candidates: Application of a Monte-Carlo Simulated Model
• XMM-Newton observation of the X-ray point source population of the starburst galaxy IC342
• SS433's accretion disc, wind and jets: before, during and after a major flare
• Distance to the galaxy IC 342
• Long-term X-ray Variability Study of IC342 from XMM-Newton Observations
• The application of slim disk models to ULX: the case of M33 X-8
• Two Power-Law States of the Ultraluminous X-ray Source IC342 X-1
• High Resolution X-Ray Imaging of the Center of IC342
• Calibrated Estimates of the Energy in Major Flares of GRS 1915+105

Cited by in corpus (10)

• Ultraluminous X-Ray Sources
• The X-ray spectral evolution of the ultraluminous X-ray source Holmberg IX X-1
• Roche-lobe overflow systems powered by black holes in young star clusters: the importance of dynamical exchanges
• NuSTAR and Swift observations of the ultraluminous X-ray source IC 342 X-1 in 2016: witnessing spectral evolution
• Jets, Arcs and Shocks: NGC 5195 at radio wavelengths
• X-ray spectral and optical properties of a ULX in NGC 4258 (M106)
• Propeller states in locally super-critical ULXs
• X-ray properties of two transient ULX candidates in galaxy NGC 7090
• The ULX Source X-3 in NGC 4258: A Search for Its X-ray and Optical Properties
• Identification of a New Ultraluminous X-ray Source in NGC 1316