SIMBAD references

We present the most extensive sample of 45 type I (short) and 275 type II (long) gamma-ray bursts (GRBs) with known redshift to investigate the correlation between the rest-frame peak energy, E_p,i and the total isotropic equivalent energy, E_iso of the prompt emission (Amati relation). The E_p,i-E_iso correlation for type I bursts is found to be well distinguished from the one constructed for type II bursts and has a similar power-law index value, E_p,i∝E_iso^∼0.4, which possibly indicates the same emission mechanism of both GRB types. We show that the initial pulse complex (IPC) of type I bursts with an extended emission and regular type I bursts follow the same correlation. We obtain similar results for type II bursts associated with Ic supernovae and for regular type II bursts. Three possible outliers from the E_p,i-E_iso correlation for type II subsample are detected. Significant evolution of the E_p,i-E_iso correlation with redshift for type II bursts is not found. We suggest the new classification method, based on the E_p,i-E_iso correlation and introduce two parameters, EH = E_p,i,2 E_iso,51^–0.4 and EHD = E_p,i,2 E_iso,51^–0.4 T_90,i^–0.5, where E_p,i,2 is the value of E_p,i parameter in units of 100 keV, E_iso,51 is the value of E_iso parameter in units of 10⁵¹ erg, and T_90,i is the rest-frame duration in units of seconds. EHD is found to be the most reliable parameter for the blind type I/type II classification, which can be used to classify GRBs with no redshift.