  A search for X-ray emission from compact groups revealed detection from 8 out
of the 12 HCG images extracted from the ROSAT public archive. For two of them
the X-ray emission originates from galaxies in the group. On the contrary,
three groups show an extended emission clearly caused by hot intracluster gas.
A Raymond-Smith hot plasma model provides an excellent fit to the X-ray
spectra. The estimated temperatures are distributed in a quite narrow range
(from 0.73 to 0.92 keV) and are consistent, within the errors, with 0.9 keV.
The luminosity ranging from 0.75 to $5.1\cdot10^{42}$erg s$^{-1}$. The most
relevant result is the low metal abundance surely detected in two of them and
likely in a third that characterizes the hot gas cloud responsible for the
X-ray emission. The data concerning the remaining 3 detected compact groups are
not sufficient to discriminate with certainty between diffuse and/or point-like
X-ray emission. However the results of the spectral analysis point to the
presence of a hot gas again with low metal abundance.
