A broadband comma time-resolved study of the persistent Stellar Mass Black Hole LMC X

We propose joint XMM and NuSTAR observations of the stellar mass black holeXray binary LMC X1. These broadband observations will be the first tosimultaneously constrain both the soft thermal component from the accretion diskaround the black hole and the nonthermal continuum emission that extends intothe hard Xray band. The improved energy resolution of NuSTAR and the overlapbetween the XMM and NuSTAR bands will improve the measurement of the black holespin via the broad iron line. The soft thermal component has short timescale(hours) variability of unknown origin; we will improve the temporal resolutionof the continuum components by roughly an order of magnitude over previousobservations and shed light on the nature of these variations. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]