Sub-second infrared variability from the archetypal accreting neutron star 4U~1728-34

F. M. Vincentelli, P. Casella, A. Borghese +23

We report on the first simultaneous high-time resolution X-ray and infrared (IR) observations of a neutron star low mass X-ray binary in its hard state. We performed $\approx 2$h…