WE PROPOSE TO OBSERVE THE NEUTRON STAR LOW-MASS X-RAY BINARIES AND ATOLL SOURCES GX 3+1 4U 0614+09 4U 1735-44 4U 1746-37 AND 4U 1702-43 FOR 20 KS EACH. OUR PRIMARY GOAL IS TO INCREASE THE NUMBER OF NEUTRON STARS WITH CLEAR ROBUST INDICATIONS OF RELATIVISTIC REFLECTION FROM THE INNER DISK. THESE OBSERVATIONS WILL ALSO ADDRESS THE RADIAL EXTENT OF THE INNER DISK IN ATOLL SOURCES WHICH LIKELY ACCRETE AT A LOW EDDINGTON FRACTION SIMILAR TO THE BLACK HOLE LOW/HARD STATE. OUR FINAL GOAL IS TO FIND EXAMPLES OF DISKS THAT EXTEND VERY CLOSE TO STELLAR SURFACES IN ORDER TO OBTAIN LIMITS ON NEUTRON STAR RADII.
$59,144FY2020National Aeronautics and Space AdministrationNASA
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