AFTER A BLACK HOLE TRANSIENT HAS REACHED THE BRIGHT AND SOFT THERMAL-DOMINANT STATE IT UNDERGOES A MONTHS-LONG GRADUAL DECLINE IN THE SAME THERMAL STATE. THESE DATA CONTAIN MINIMAL CONTRIBUTION FROM THE NONTHERMAL COMPTON AND REFLECTION COMPONENTS AND AS SUCH ARE THE GOLD-STANDARD FOR SPIN MEASUREMENTS VIA X-RAY CONTINUUM FITTING.
$37,232FY2021National Aeronautics and Space AdministrationNASA
Smithsonian Institution, Washington DC