SIMBAD references

2011ApJ...726L...4W - Astrophys. J., 726, L4 (2011/January-1)

Gamma-ray burst afterglows as analogs of high-frequency-peaked BL Lac objects.

WANG J. and WEI J.Y.

Abstract (from CDS):

The spectral properties from radio-to-optical bands are compared between the 18 optically bright gamma-ray burst (GRB) afterglows and the well-established power-spectrum sequence in blazars. The comparison shows that the afterglows are in well agreement with the well-known blazar sequence (i.e., the νL ν(5 GHz)-αROcorrelation, where αRO is the broadband spectral slope from radio-to-optical bands). The afterglows are, however, clustered at the low-luminosity end of the sequence, which is typically occupied by high-frequency-peaked BL Lac objects (HBLs). The correlation suggests that GRB afterglows share a similar emission process with HBLs. We further identify a deviation at a significance level larger than 2σ from the sequence for three typical optically "dark" bursts. The deviation favors a heavy extinction in optical bands for the "dark" bursts. The extinction AV is estimated to be larger than 0.5-0.6 mag from the νLν(5 GHz)-αRO sequence.

Abstract Copyright:

Journal keyword(s): BL Lacertae objects: general - gamma-ray burst: general - methods: statistical

Simbad objects: 24

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