  Abell 548W, one of the galaxy clusters located in the Abell 548 region, has
about an order of magnitude lower X-ray luminosity compared to ordinal clusters
in view of the well known intracluster medium (ICM) temperature vs X-ray
luminosity (kT-L_X) relation. The cluster hosts a pair of diffuse radio sources
to the north west and north, both about 10' apart from the cluster center. They
are candidate radio relics, frequently associated with merging clusters. A
Suzaku deep observation with exposure of 84.4 ks was performed to search
signatures for merging in this cluster. The XIS detectors successfully detected
the ICM emission out to 16' from the cluster center. The temperature is ~3.6
keV around its center, and ~2 keV at the outermost regions. The hot region (~6
keV) aside the relic candidates shifted to the cluster center reported by
XMM-Newton was not seen in the Suzaku data, although its temperature of 3.6 keV
itself is higher than the average temperature of 2.5 keV around the radio
sources. In addition, a signature of a cool (kT ~0.9 keV) component was found
around the north west source. A marginal temperature jump at its outer-edge was
also found, consistent with the canonical idea of shock acceleration origin of
the radio relics. The cluster has among the highest central entropy of ~400 keV
cm^2 and is one of the so-called low surface brightness clusters. Taking into
account the fact that its shape itself is relatively circular and smooth and
also its temperature structure is nearly flat, possible scenarios for merging
is discussed.
