Katsuda's paper on the Cygnus Loop has been accpected for publication in The Astrophysical Journal Letters.

Dr. Katsuda and a team of scientist have discovered a pulsar wind nebula candidate in the Cygnus Loop supernova remnant, based on X-ray observations with Suzaku and XMM-Newton. While the origin of the Cygnus Loop has been believed to be a core-collapse of a massive star, no neutron star associated with the remnant has been found yet, remaining a mystery of the Cygnus Loop. Tacking this issue as well as other interesting scientific objectives, a team of scientists including Katsuda has been observing the Cygnus Loop with Suzaku and XMM-Newton for 10 years. By carefully analyzing the whole data, they finally discovered a pair of hard X-ray-emitting nebula and a pointlike source in the southern edge of the Loop, whose spectral features are consistent with a neutron star and its synchrotron nebula. While its relation to the Loop has been a matter of debate, if it is the case, the discovery solves the long-standing mystery of the Cygnus Loop. The paper was published in The Astrophysical Journal Letters, Volume 754, Issue 1 (2012).