Epeak Relation of Gamma-Ray Bursts
نویسنده
چکیده
In this Letter we show that there is a redshift degeneracy in the Eiso −Epeak relation of gamma-ray bursts (GRBs). If a GRB has a redshift solved from the Eiso − Epeak relation that lies in the range of 0.9 < z < 20, a GRB that has the same observed fluence and peak spectral energy but is at a different redshift in that range also satisfies the Eiso − Epeak relation within 1-σ error, implying an extremely large error in the calculated redshift. Even if the data scatter in the Eiso − Epeak relation is reduced by a factor of 2, the error in the predicted redshift is still large enough to prevent constraining the redshift meaningfully. Hence, the Eiso − Epeak relation is not useful for determining the GRB distance.
منابع مشابه
Redshift Degeneracy in the Eiso–Epeak Relation of Gamma-Ray Bursts
In this Letter we show that there is a redshift degeneracy in the Eiso–Epeak relation of gamma-ray bursts (GRBs). If a GRB has a redshift solved from the Eiso–Epeak relation that lies in the range of 0.9 < z < 20, a GRB that has the same observed fluence and peak spectral energy but is at a different redshift in that range also satisfies the Eiso– Epeak relation within 1-σ error, implying an ex...
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