The afterglow, redshift and extreme energetics of the gamma-ray burst of 23 January 1999

Authors :: Kulkarni, S.R.
Djorgovski, S.G.
Odewahn, S.C.
Bloom, J.S.
Gal, R.R.
Koresko, C.D.
Harrison, F.A.
Lubin, L.M.
Armus, L.
Sari, R.
Illingworth, G.D.
Kelson, D.D.
Magee, D.K.
van Dokkum, P.G.
Frail, D.A.
Mulchaey, J.s.
Malkan, M.A.
McClean,I.S.
Teplitz, H.I.
Koerner, D.
Kirkpatrick D.
Kobayshi, N.
Yadigaroglu, I.A.
Halpern, J.
Piran, T.
Goodrich, R.w.
Chaffee, F.H.
Feroci, Mi
Costa. E.
Source :: Nature. April 1, 1999, p389, 6 p.
Publication Year :: 1999
Abstract: Long-lived emission or afterglow, has been detected from gamma-ray bursts at cosmological distances with redshifts, z, ranging from one to three. Optical and near-infrared observations of the afterglow of GRB990123 have determined a redshift of z>1.6 which is the brightest gamma-ray burst. The data may provide evidence of beamed radiation, rather than isotropic radiation.

Subjects :: Gamma rays -- Research
Cosmology -- Research
Environmental issues
Science and technology
Zoology and wildlife conservation

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