  We present ROSAT observations of the starburst galaxy NGC 2782 (HRI plus a
weak PSPC frame) and the ultraluminous infrared galaxy NGC 6240 (PSPC). The
(0.1-2.4) keV spectra of both objects appear similar. However, due to better
sampling spectral modeling is only warranted in case of NGC 6240 for which both
a single thermal Raymond-Smith model (kT = 0.44) or a hybrid model consisting
of 80% power-law with the canonical photon index -1.9 plus 20% Raymond-Smith
contribution (kT = 0.63) lead to good fits. However, the single thermal model
turns out to be unlikely because it yields a luminosity of 3.8 10^{43} erg/s,
which is hard to reach in a starburst superwind-scenario. The hybrid model
leads to a more moderate luminosity of 5.2 10^{42} erg/s, of which 1.0 10^{42}
erg/s can be attributed to shocked superwind gas. We link the remaining 4.2
10^{42} erg/s powerlaw to an AGN component because the alternative of
inverse-compton scattering of the FIR radiation leads to a too low flux when
estimated with available data. The result appears to be consistent with
preliminarily announced ASCA observations. For NGC 2782 we find L_x = 4 10^{41}
erg/s which can be explained by emission from a shocked superwind region with a
high preshock density in agreement with earlier optical evidence for an
outflowing supershell.
