WE PROPOSE A SERIES OF 4 TARGET OF OPPORTUNITY (TOO) OBSERVATIONS WITH NUSTAR AND NICER FOR ANY OF THE FIVE FOLLOWING RECURRENT BLACK HOLE BINARIES: GX 339-4 H1743-322 4U 1630-47 XTE J1550-564 OR XTE 1752-223. WE AIM TO OBTAIN HIGH SIGNAL-TO-NOIS
$88,191FY2020National Aeronautics and Space AdministrationNASA
California Institute Of Technology, Pasadena CA