We report the discovery of an X-ray counterpart of the unidentified very high energy gamma-ray source HESS J1427–608 .
In the sky field coincident with HESS J1427–608 , an extended source was found in the 2–8 keV band , and was designated as Suzaku J1427–6051 .
Its X-ray radial profile has an extension of \sigma = \timeform { 0.9 ^ { \prime } } \pm \timeform { 0.1 ^ { \prime } } if approximated by a Gaussian .
The spectrum was well fitted by an absorbed power-law with N _ { H } = ( 1.1 \pm 0.3 ) \times 10 ^ { 23 } ~ { } { cm } ^ { -2 } , \Gamma = 3.1 ^ { +0.6 } _ { -0.5 } , and the unabsorbed flux F _ { X } = ( 9 ^ { +4 } _ { -2 } ) \times 10 ^ { -13 } ~ { } { erg } ~ { } { s } ^ { -1 } ~ { } { cm } ^ { % -2 } in the 2–10 keV band .
Using XMM-Newton archive data , we found seven point sources in the Suzaku source region .
However , because their total flux and absorbing column densities are more than an order of magnitude lower than those of Suzaku J1427–6051 , we consider that they are unrelated to the Suzaku source .
Thus , Suzaku J1427–6051 is considered to be a truly diffuse source and an X-ray counterpart of HESS J1427–608 .
The possible nature of HESS J1427–608 is discussed based on the observational properties .