  An elongated X-ray source with a strong K-shell line from He-like iron (Fe
XXVI) is found at (RA, Dec)_{J2000.0}=(17h44m00s.0, -29D13'40''.9) in the
Galactic center region. The position coincides with the X-ray thread,
G359.55+0.16, which is aligned with the radio non-thermal filament. The X-ray
spectrum is well fitted with an absorbed thin thermal plasma (apec) model. The
best-fit temperature, metal abundance, and column density are 4.1^{+2.7}_{-1.8}
keV, 0.58^{+0.41}_{-0.32} solar, and 6.1^{+2.5}_{-1.3}x10^{22} cm^{-2},
respectively. These values are similar to those of the largely extended
Galactic center X-ray emission.
