Evolution of the cluster X-ray scaling relations since z > 0.4

We derive correlations between X-ray temperature, luminosity, and gas mass for a sample of 22 distant, z > 0.4, galaxy clusters observed with Chandra. We detect evolution in all three correlations between z > 0.4 and the present epoch. In particular, in the Omega = 0.3 Lambda = 0.7, cosmology, the luminosity corresponding to a fixed temperature scales approximately as (1 + z)(1.5+/-0.3); the gas mass for a fixed luminosity scales as (1 + z)(-1.8+/-0.4) and the gas mass for a fixed temperature scales as (1 + z)(-0.5+/-0.4) (all uncertainties are 90% confidence). We briefly discuss the implication of these results for cluster evolution models.