We report on XMM - Newton observations of G32.45+0.1 and G38.55+0.0 .
These were discovered as diffuse hard X-ray sources with the ASCA Galactic plane survey , but the limited spatial resolution of ASCA could not conclude whether these are truly diffuse or a group of unresolved point-sources . XMM - Newton , with higher spatial resolution than ASCA , confirmed that G32.45+0.1 has a diffuse shell-like structure with a radius of \sim 4 ^ { \prime } .
The spectrum shows featureless continuum , hence can be fitted with a power-law model of \Gamma \sim 2.2 with an absorption of N _ { H } \sim 5.2 \times 10 ^ { 22 } ~ { } { cm } ^ { -2 } .
From this N _ { H } value , we estimate the distance to G32.45+0.1 to be \sim 17 kpc , then the luminosity ( in the 0.5–10.0 keV band ) and radius of the shell are \sim 9.5 \times 10 ^ { 34 } ergs s ^ { -1 } and \sim 20 pc , respectively .
The radio complex sources in the NRAO/VLA Sky Survey ( NVSS ; 1.4 GHz ) are globally associated to the X-ray shell of G32.45+0.1 .
Therefore G32.45+0.1 is likely to be a synchrotron dominant shell-like SNR .
No significant diffuse structure was found in the XMM - Newton image of another ASCA diffuse source G38.55+0.0 .
The upper limit of the observed flux ( 0.5–10.0 keV ) is estimated to be 9.0 \times 10 ^ { -13 } ergs cm ^ { -2 } s ^ { -1 } being consistent with the ASCA result .

Department of Physics , Graduate School of Science , Kyoto University , Sakyo-ku , Kyoto 606-8502 RIKEN ( The Institute of Physical and Chemical Research ) , 2-1 Hirosawa , Wako , Saitama 351-0198 Faculty of Humanities and Social Sciences , Iwate University , 3-18-34 Ueda , Morioka , Iwate 020-8550