Further X-ray observations of the galaxy cluster PKS 0745-191 to the
  virial radius and beyond
  We use new Suzaku observations of PKS 0745-191 to measure the thermodynamic
properties of its ICM out to and beyond r_{200} (reaching 1.25r_{200}) with
better accuracy than previously achieved, owing to a more accurate and better
understood background model. We investigate and resolve the tensions between
the previous Suzaku and ROSAT results for PKS 0745-191, which are found to be
principally caused by incorrect background modelling in the previous Suzaku
analysis. We investigate in depth the systematic errors affecting this
observation, and present temperature, density, entropy and gas mass fraction
profiles reaching out to and beyond the virial radius. We find that the entropy
profile flattens in the outskirts as originally observed in the previous Suzaku
analysis, but that the flattening starts at larger radius. The flattening of
the entropy profile and our mass analysis suggests that outside ~17' (~1.9 Mpc)
the ICM is out of hydrostatic equilibrium or the presence of significant
non-thermal pressure support.
