Gamma-ray burst afterglows : luminosity clustering at infrared wavelengths?

Details Gamma-ray burst afterglows : luminosity clustering at infrared wavelengths? Gamma-ray burst afterglows : luminosity clustering at infrared wavelengths?

2008-10-16

arxiv.org/abs/0810.2893v2

Astronomy and Astrophysics

Astrophysics

4 pages, 6 color figures. Accepted for publication as a Letter in A&A

Scientific paper

10.1051/0004-6361:200810762

Clustering in the luminosity of the afterglows of gamma-ray burst has been reported in the optical and X-ray. We investigate the possibility that a clustering in the luminosity of the afterglows of gamma-ray burst exists in near infrared (J, H, K bands). We use observations of events occurring from 1997 to the end of 2007. We correct the gamma-ray burst afterglow light curve for distance effect and time dilation, and replace all light curves to a common distance of z=1. We used only observations of signal emitted in the near infrared (in the burst frame). We observe a clustering identical to the one observed in optical and similar to the one observed in X-ray. We thus confirm the previous works made in optical. We set a constraint on the total energy of the fireball.

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