A detailed study on the reflection component for the Black Hole Candidate MAXI J1836-194

Understand

We present a detailed spectral analysis of the black hole candidate MAXI J1836-194.

• The source was caught in the intermediate state during its 2011 outburst by Suzaku and RXTE.
• We jointly fit the X-ray data from these two missions using the relxill model to study the reflection component, and a steep inner emissivity profile indicating a compact corona as the primary source is required in order to achieve a good fit.
• In addition, a reflection model with a lamp-post configuration (relxilllp), which is normally invoked to explain the steep emissivity profile, gives a worse fit and is excluded at 99% confidence level compared to relxill.