RETRACTED: X-ray observations of PSR B0355+54 and its pulsar wind nebula (Retracted article. See vol. 364, 2019)

We present X-ray data of the middle-aged radio pulsar PSR B0355+54. The XMM-Newton and Chandra observations show not only emission from the pulsar itself, but also compact diffuse emission extending similar to 50" in the opposite direction to the pulsar's proper motion. Our analysis also indicates the presence of fainter diffuse emission extending similar to 50" from the point source. The morphology of the diffuse component is similar to the ram-pressure confined pulsar wind nebulae detected for other sources. We find that the compact diffuse component is well-fitted with a power-law, with an index that is consistent with the values found for other pulsar wind nebulae. The core emission from the pulsar can be characterized with a thermal plus power-law fit, with the thermal emission most likely originating in a hot polar cap.