Fig. 5

Star formation rate vs. stellar mass for GRB hosts from Savaglio (2015), plotted in four redshift intervals: z< 0.5 (blue), 0.5 <z< 1 (green), 1 <z< 2 (red), and z> 2 (black). Red open triangles show those with previously reported radio detections. Open red diamonds denote our sample with the red asterisk being GRB 050219, not belonging to the original sample selection. The colored lines are the main-sequence relations for each of the four redshift bins (Speagle et al. 2014). The diagonal dashed line indicates the specific SFR = 0.4/Gyr. While high specific SFR (outside the dashed box; the three GRBs at ≈ 0.2M⊙/yr were reported only after we made our selection and executed the observations) suggested to be a promising selection criterion for a large radio detection probability, this is not borne out by our observations.
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