A UNIFIED MODEL FOR GRB PROMPT EMISSION FROM OPTICAL TO γ-RAYS; EXPLORING GRBs AS STANDARD CANDLES
A UNIFIED MODEL FOR GRB PROMPT EMISSION FROM OPTICAL TO γ-RAYS; EXPLORING GRBs AS STANDARD CANDLES
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DOI：
10.3847/2041-8205/831/1/l8
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发表时间：
2016-06
期刊：
影响因子：
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通讯作者：
S. Guiriec;C. Kouveliotou;D. Hartmann;J. Granot;K. Asano;P. Mészáros;R. Gill;N. Gehrels;J. Mcenery
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文献类型：
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作者：
S. Guiriec;C. Kouveliotou;D. Hartmann;J. Granot;K. Asano;P. Mészáros;R. Gill;N. Gehrels;J. Mcenery
The origin of prompt emission from gamma-ray bursts (GRBs) remains to be an open question. Correlated prompt optical and γ-ray emission observed in a handful of GRBs strongly suggests a common emission region, but failure to adequately fit the broadband GRB spectrum prompted the hypothesis of different emission mechanisms for the low- and high-energy radiations. We demonstrate that our multi-component model for GRB γ-ray prompt emission provides an excellent fit to GRB 110205A from optical to γ-ray energies. Our results show that the optical and highest γ-ray emissions have the same spatial and spectral origin, which is different from the bulk of the X- and softest γ-ray radiation. Finally, our accurate redshift estimate for GRB 110205A demonstrates promise for using GRBs as cosmological standard candles.
