Identification of a host galaxy at redshift z = 3.42 for the γ-ray burst of 14 December 1997

S. R. Kulkarni (), S. G. Djorgovski, A. N. Ramaprakash, R. Goodrich, J. S. Bloom, K. L. Adelberger, T. Kundic, L. Lubin,, D. A. Frail, F. Frontera, M. Feroci, L. Nicastro, A. J. Barth, M. Davis, A. V. Filippenko and J. Newman
Additional contact information
S. R. Kulkarni: Palomar Observatory 105-24, California Institute of Technology
S. G. Djorgovski: Palomar Observatory 105-24, California Institute of Technology
A. N. Ramaprakash: Palomar Observatory 105-24, California Institute of Technology
R. Goodrich: W. M. Keck Observatory
J. S. Bloom: Palomar Observatory 105-24, California Institute of Technology
K. L. Adelberger: Palomar Observatory 105-24, California Institute of Technology
T. Kundic: Palomar Observatory 105-24, California Institute of Technology
L. Lubin,: Palomar Observatory 105-24, California Institute of Technology
D. A. Frail: National Radio Astronomy Observatory
F. Frontera: Istituto Tecnnologie Studio delle Radiazioni Extraterrestri, CNR, via Gobetti 101
M. Feroci: Istituto di Astrofisica Spaziale, CNR, via Fosso del Cavaliere
L. Nicastro: Istituto Fisica Cosmica App. Info., CNR, via U. La Malfa 153
A. J. Barth: University of California
M. Davis: University of California
A. V. Filippenko: University of California
J. Newman: University of California

Nature, 1998, vol. 393, issue 6680, 35-39

Abstract: Abstract Knowledge of the properties of γ-ray bursts has increased substantially following recent detections of counterparts at X-ray, optical and radio wavelengths. But the nature of the underlying physical mechanism that powers these sources remains unclear. In this context, an important question is the total energy in the burst, for which an accurate estimate of the distance is required. Possible host galaxies have been identified for the first two optical counterparts discovered, and a lower limit obtained for the redshift of one of them, indicating that the bursts lie at cosmological distances. A host galaxy of the third optically detected burst has now been identified and its redshift determined to be z = 3.42. When combined with the measured flux of γ-rays from the burst, this large redshift implies an energy of 3× 1053 erg in the γ-rays alone, if the emission is isotropic. This is much larger than the energies hitherto considered, and it poses a challenge for theoretical models of the bursts.

Date: 1998
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DOI: 10.1038/29927

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