Looking at A 0535+26 at low luminosities with NuSTAR

Ralf Ballhausen, Katja Pottschmidt, Felix Fürst +12

We report on two NuSTAR observations of the HMXB A 0535+26 taken toward the end of its normal 2015 outburst at very low $3-50$ keV luminosities of $\sim 1.4\times 10^{36}$ erg/s an…