Figure 12-25X-Ray Pulses from Centaurus X-3 This graph shows the intensity of X-rays detected by Uhuru as Centaurus X-3 moved across the satellite’s field of view. The variation in the height of the pulses was a result of the changing orientation of Uhuru’s X-ray detectors toward the source as the satellite rotated. The short pulse period suggests that the source is a rotating neutron star.