Discovery of optical pulsations in V2116 Ophiuchi/GX 1+4

Francisco J. Jablonski, Marildo G. Pereira, Joao Braga +1

We report the detection of pulsations with $\sim 124$ s period in V2116 Oph, the optical counterpart of the low-mass X-ray binary GX 1+4. The pulsations are sinusoidal with modulat…