Correlating spectral and timing properties in the evolving jet of the micro blazar MAXI J1836-194

Understand

During outbursts, the observational properties of black hole X-ray binaries (BHXBs) vary on timescales of days to months.

• These relatively short timescales make these systems ideal laboratories to probe the coupling between accreting material and outflowing jets as a the accretion rate varies.
• In particular, the origin of the hard X-ray emission is poorly understood and highly debated.
• This spectral component, which has a power-law shape, is due to Comptonisation of photons near the black hole, but it is unclear whether it originates in the accretion flow itself, or at the base of the jet, or possibly the interface region between them.