For example, X-ray pulsars are probably old rotationally-powered pulsars that have already lost most of their power, and have only become visible again after their binary companions had expanded and began transferring matter on to the neutron star.
Napríklad röntgenové pulzary sú pravdepodobne staré pulzary poháňané rotáciou, ktoré už stratili väčšinu svojej energie a stali sa znova viditeľné po tom, čo ich sprievodné hviezdy expandovali a začali presúvať hmotu na neutrónovú hviezdu.