The hard state of a transient black hole: is the accretion disk truncatedquestionMark

The combination of the fast EPICpn modes and broadband coverage with RXTE wasan effective means of exploring accretion in bright Galactic black holes.XMMNewton and NuSTAR provide an even more powerful combination. We propose onejoint 40 ks observation of a new or known black hole transient during a bright,hard outburst. The goals of this program are to 1) measure the inner accretiondisk radius of the black hole via disk reflection spectrum and infer the blackhole spin, 2) test an apparent anticorrelation between winds and jets in softand hard states by making a very sensitive search for winds in a hard state.This observation will be supported by a network of groundbased observatoriesand Xray monitoring and is in continuation of our successful program in AO 13 15. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]