A Broad Iron Line in LMC X-1

Understand

We present results from a deep Suzaku observation of the black hole in LMC X-1, supplemented by coincident monitoring with RXTE.

• We identify broad relativistic reflection features in a soft disc-dominated spectrum.
• A strong and variable power-law component of emission is present which we use to demonstrate that enhanced Comptonisation strengthens disc reflection.
• We constrain the spin parameter of the black hole by modelling LMC X-1's broad reflection features.