The new study finds that the supernovae are likely powered by the creation of a magnetar, an extraordinarily magnetized neutron star spinning hundreds of times per second. (sciencedaily.com)
They are incredibly dense, packing about as much mass as the Sun into a sphere just 20 kilometres or so across, and some rotate hundreds of times per second. (newscientist.com)
Pulsar timing detectors are best for sensing waves in which years pass between peaks; ground - based interferometers perk up when hit by waves oscillating hundreds of times per second. (sciencenews.org)