Insight-HXMT, NuSTAR and INTEGRAL Data Show Disk Truncation in the Hard State of the Black-Hole X-Ray Binary MAXI J1820+070

Understand

We study X-ray and soft gamma-ray spectra from the hard state of the accreting black-hole binary MAXI J1820+070.

• We perform analysis of joint spectra from HXMT, NuSTAR and INTEGRAL.
• We find an overall agreement between the spectra from all three satellites.
• Satisfactory fits to the data require substantial spectral complexity, with our models including two Comptonization regions and their associated disk reflection, a disk blackbody and a narrow Fe K$\alpha$ line.