X-ray detection from shell-like SNR G359.1−0.5 Original Research Article

We detected X-rays from the shell-like radio SNR (supernova remnant) G359.1−0.5 with ASCA satellite. Center-filled X-rays with no pulsation are found, but no X-ray from the radio shell is detected. The X-ray spectrum shows (1) a large absorption of 8×1022 H cm−2, suggesting that G359.1−0.5 lies near the Galactic center, which is consistent with radio observations and (2) two prominent lines whose center energies correspond to the emission lines from He-like Si and H-like S. The line profile could be reproduced with a two-component plasma model, suggesting presence of a high temperature plasma together with an overabundance of S. No difference between emitting regions of the two components is found.