THE COMBINATION OF THE FAST EPIC-PN MODES AND BROAD-BAND COVERAGE WITH RXTE PROVED TO BE AN EFFECTIVE MEANS OF EXPLORING ACCRETION IN BRIGHT GALACTIC BLACK HOLES. XMM-NEWTON AND NUSTAR PROVIDE AN EVEN MORE POWERFUL COMBINATION. WE PROPOSE TO MAKE ONE JOINT 40 KS OBSERVATION OF A NEW OR KNOWN BLACK HOLE TRANSIENT DURING A BRIGHT HARD OUTBURST PHASE. THE GOALS OF THIS PROGRAM ARE TO 1) MEASURE THE SPIN OF THE BLACK HOLE VIA THE FE KA LINE AND BROAD-BAND DISK REFLECTION SPECTRUM 2) TEST AN APPARENT ANTI-CORRELATION BETWEEN WINDS AND JETS IN SOFT AND HARD STATES BY MAKING A VERY SENSITIVE SEARCH FOR WINDS IN A HARD INTERMEDIATE OR VERY HIGH STATE. THIS OBSERVATION WILL BE SUPPORTED BY A NETWORK OF GROUND-BASED OBSERVATORIES AND X-RAY MONITORING AND IS IN CONTINUATION OF OUR SUCCESSFUL PROGRAM IN AO 13-15.

California Institute Of Technology, Pasadena CA

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