Speaker
Description
Using data from LHAASO's WCDA and KM2A, we detected TeV gamma-ray emission from the supernova remnant S147. The morphology of the emission can be described as a point source plus an extended component in the WCDA data, while the KM2A data suggests a point-like source (with a 95% upper limit on the extension of 0.15°). The fitted point source position is slightly offset (~0.1°) from the pulsar PSR J0538+2817, located in the direction of the pulsar's motion. Furthermore, the pulsar has a radio filament oriented along its travel path and perpendicular to its X-ray emission axis, pointing toward the fitted point source. The extended emission detected in the WCDA data does not correspond well with the gamma-ray morphology observed by Fermi-LAT. The WCDA and KM2A data were used up to July 31, 2025, with live times of 1484 and 1944 days, respectively.
