ΣSFR/M₂₀₀ (in units of M_⊙   yr^-1/10¹⁴   M_⊙), where ΣSFR is estimated within a region of radius 0.5   r₂₀₀, as a function of redshift for A1763 (filled diamond) and for other clusters from the literature. Triangles and open diamonds denote values taken from Bai et al. (2009) and Chung et al. (2010), respectively. 1σ error bars are shown. The downward-directed (respectively upward-directed) arrow denotes an upper (respectively lower) limit. The curve represents the fitting relation of Bai et al. (2009) ΣSFR/mass  = 1.2(1 + z)^5.3.