Discovery of a young, 267 millisecond pulsar in the supernova remnant W44

The discovery of a 267 ms pulsar, PSR 1853+01, in the supernova remnant W44 (G34.7−0.4) is reported. The pulsar is located south of the center of W44, well within its radio shell and at the southern edge of the X-ray emission region which fills the interior of the remnant. The period derivative leads to a characteristic age of ∼ 20000 yr for the pulsar, which agrees well the estimated age of W44 (≥10,000 yr). The data clearly indicate that the two objects are physically related and form the sixth known pulsar-supernova remnant association.