Long-term observations of the pulsars in 47 Tucanae. I. A study of four elusive binary systems

A. Ridolfi, P. Freire, P. Torne +11

For the past couple of decades, the Parkes radio telescope has been regularly observing the millisecond pulsars in 47 Tucanae (47 Tuc). This long-term timing program was designed t…