Abstract
Gamma-ray bursts (GRBs) are energetic explosions that for 0.01–100 s are the brightest γ-ray sources in the sky1,2. Observations of the early evolution of afterglows are expected to provide clues about the nature of the bursts, but their rapid fading has hampered such studies; some recent rapid localizations3,4,5 of bursts have improved the situation. Here we report an early detection of the very bright afterglow of the burst of 29 March 2003 (GRB030329). Our data show that, even early in the afterglow phase, the light curve shows unexpectedly complicated structures superimposed on the fading background.
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References
Wijers, R. A. M. J., Rees, M. J. & Meszaros, P. Shocked by GRB 970228: the afterglow of a cosmological fireball. Mon. Not. R. Astron. Soc. 288, L51–L56 (1997)
Waxman, E. Gamma-ray-burst afterglow: Supporting the cosmological fireball model, constraining parameters, and making predictions. Astrophys. J. 485, L5–L8 (1997)
Fox, D. W. et al. Early optical emission from the γ-ray burst of 4 October 2002. Nature 422, 284–286 (2003)
Weidong, L., Alexei, F. V., Ryan, C. & Saurabh, J. The early light curve of the optical afterglow of GRB 021211. Astrophys. J. 586, L9–L12 (2003)
Fox, D. W. et al. Discovery of early optical emission from GRB 021211. Astrophys. J. 586, L5–L8 (2003)
Vanderspek, R. et al. RB030329 (= H2652): A long, extremely bright GRB localized by the HETE WXM and SXC. GRB Circ. Netw. 1997 (2003)
Peterson, B. A. & Price, P. A. GRB 030329: Optical afterglow candidate. GRB Circ. Netw. 1985 (2003)
Torii, K. GRB 030329: OT candidate. GRB Circ. Netw. 1986 (2003)
Uemura, M. GRB 030329: Optical afterglow fading. GRB Circ. Netw. 1989 (2003)
Greiner, J. et al. Redshift of GRB 030329. GRB Circ. Netw. 2020 (2003)
Caldwell, N., Garnvich, P., Holland, S., Matheson, T. & Stanek, K. Z. GRB 030329, optical spectroscopy. GRB Circ. Netw. 2053 (2003)
Tinney, C. et al. GRB 980425. IAU Circ. 6896 (1998)
Sari, R., Piran, T. & Narayan, R. Spectra and light curves of gamma-ray burst afterglows. Astrophys. J. 497, L17–L20 (1998)
Sari, R. & Piran, T. Predictions for the very early afterglow and the optical flash. Astrophys. J. 520, 641–649 (1999)
Rhoads, J. E. The dynamics and light curves of beamed gamma-ray burst afterglows. Astrophys. J. 525, 737–749 (1999)
Stanek, K. Z., Garnavich, P. M., Kaluzny, J., Pych, W. & Thompson, I. BVRI observations of the optical afterglow of GRB 990510. Astrophys. J. 522, L39–L42 (1999)
Malesani, D. et al. GRB021004: optical observations and predicted break time. GRB Circ. Netw. 1607 (2002)
Frail, D. A. et al. Beaming in gamma-ray bursts: Evidence for a standard energy reservoir. Astrophys. J. 562, L55–L58 (2001)
Reichart, D. E. GRB 970228 revisited: Evidence for a supernova in the light curve and late spectral energy distribution of the afterglow. Astrophys. J. 521, L111–L115 (1999)
Stanek, K. Z. et al. Spectroscopic discovery of the supernova 2003dh associated with GRB 030329. Astrophys. J. (in the press); preprint at 〈http://xxx.lanl.gov/astro-ph/0304173〉 (2003)
Galama, T. J. et al. Optical follow-up of GRB 970508. Astrophys. J. 497, L13–L16 (1998)
Piro, L. et al. Evidence for a late-time outburst of the X-ray afterglow of GB970508 from BeppoSAX. Astron. Astrophys. 331, L41–L44 (1998)
Garnavich, P. M., Loeb, A. & Stanek, K. Z. Resolving gamma-ray burst 000301C with a gravitational microlens. Astrophys. J. 544, L11–L15 (2000)
Nakar, E., Piran, T. & Granot, J. Variability in GRB afterglows and GRB 021004. New Astron. 8, 495–505 (2003)
Beuermann, K. et al. VLT observations of GRB 990510 and its environment. Astron. Astrophys. 352, L26–L30 (1999)
Acknowledgements
This work is supported partly by a grant-in-aid from the Japanese Ministry of Education, Culture, Sports, Science and Technology. Part of this work is supported by a Research Fellowship of the Japan Society for the Promotion of Science for Young Scientists (M.U. and R.I.).
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Uemura, M., Kato, T., Ishioka, R. et al. Structure in the early afterglow light curve of the γ-ray burst of 29 March 2003. Nature 423, 843–844 (2003). https://doi.org/10.1038/nature01735
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DOI: https://doi.org/10.1038/nature01735
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