090284

We request 80 ks of XMM-Newton and 40 ks of NuSTAR time to trigger Target ofOpportunity (ToO) observations of a new or known black hole transient during theend of its outburst after the source has entered the low-hard state. We aim toobtain high signal-to-noise data during this fainter phase in order to measurethe level of disk truncation using X-ray reflection spectroscopy. We will alsoprovide measurements for the disk inclination ionization and iron abundance.These observations will provide crucial constraints to support a large-scaledata analysis program for these sources. [truncated! Please see actual data for full text]