A number of IRAS galaxies appears rather luminous at X-rays, which cou
ld be due to the presence of an active nucleus that otherwise is obscu
red. X-ray observations offer suitable opportunities for detailed spat
ial and spectral analyses of these galaxies, which will allow to asses
s whether they possess active nuclei. We are currently working on ROSA
T, ASCA and possibly SAX data of several such galaxies.