Speaker
Description
Due to significant improvements in observatory sensitivity, numerous halo-like sources have been identified. It appears that TeV halos commonly exist around powerful middle-aged pulsars. In this study, we present an observation of 1LHAASO J0359+5406 conducted by LHAASO. By applying a mask to the region above 1LHAASO J0359+5406, our fitting results reveal that it is an extended source with an extension of approximately 0.3 degrees, located at (RA=59.72 deg, Dec=54.18 deg), and exhibits a significance of TS=456.1. The spectrum displays a logparabola shape, characterized by a norm of 4.54 x 10^{-16} TeV^{-1} cm^{-2} s^{-1}, alpha=2.72, and beta=0.82. Through an examination of the extended model fixed at Pulsar J0359+5414 and B0355+54, we find contrasting evidence to that of the HAWC Collaboration, suggesting that 1LHAASO J0359+5406 is more likely to originate from Pulsar B0355+54 with a ΔTS value of 10.8.
