A&A 492, L1-L4 (2008)
Gamma-ray burst afterglows: luminosity clustering at infrared wavelengths?B. Gendre1, S. Pelisson1, M. Boër2, S. Basa1, and A. Mazure1
1 Laboratoire d'Astrophysique de Marseille/CNRS/Université de Provence, Technopole de l'Etoile, 38 rue Frederic Joliot-Curie, 13388 Marseille Cedex 13, France
2 Observatoire de Haute Provence/CNRS, 04870 St. Michel l'Observatoire, France
Received 7 August 2008 / Accepted 14 October 2008
Context. Clustering in the luminosity of the afterglows of gamma-ray burst has been reported in the optical and X-ray.
Aims. We investigate the possibility that a clustering in the luminosity of the afterglows of gamma-ray burst exists in the near infrared (J, H, K bands). We use observations of events from 1997 to the end of 2007.
Methods. We correct the gamma-ray burst afterglow light curve for distance effects and time dilation, and rescale all light curves to a common distance of z=1. We used only observations of signals emitted in the near infrared (in the burst frame).
Results. We observe a clustering identical to the one observed in the optical and similar to the one observed in X-rays. We thus confirm previous work made in optical wavelengths and set a constraint on the total energy of the fireball.
Key words: gamma rays: bursts -- infrared: general
© ESO 2008