ULTRALUMINOUS INFRARED GALAXIES (ULIRGS LIR > 10^12 LSUN) ARE THE MOST INTRINSICALLY LUMINOUS GALAXIES IN THE LOW-REDSHIFT UNIVERSE YET THE POWER SOURCE OF ULIRGS (AGN VS STARBURST) IS STILL DEBATED. WE PROPOSE NUSTAR OBSERVATIONS OF 7 LOCAL ULIRGS
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