Non thermal X-ray from galactic supernova remnants Original Research Article

We present the ASCA results of three galactic supernova remnants, G156.2+5.7, G347.5−0.5, and G315.4−2.3. The spectra all exhibit the hard component without the thermal feature, and are spatially extended. We propose that these X-rays come from the extremely high energy electrons accelerated by the Fermi process.