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Multicolor Shallow Decay and Chromatic Breaks in the GRB 050319 Optical Afterglow

Year: 2006
Type: article
Abstract: Multiwavelength observations of the optical afterglow of GRB 050319 were performed from 1.31 to 9.92 hr after the burst. Our R -band light curves, combined with other published data, can be described by the smooth broken power-law function, with α 1 = -0.84 ± 0.02 to α 2 = -0.48 ± 0.03, 0.04 days after the gamma-ray burst. The optical light curves are characterized by shallow decays—as was also observed in the X-rays—which may have a similar origin, related to energy injection. However, our observations indicate that there is still a puzzle concerning the chromatic breaks in the R -band light curve (at 0.04 days) and the X-ray light curve (at 0.004 days) that remains to be solved.
DOI: 10.1086/510737
Authors: K. Y. Huang, Y. Urata, P. H. Kuo, W. H. Ip, K. Ioka, T. Aoki, C. W. Chen, W. P. Chen, M. Isogai, H. C. Lin, K. Makishima, H. Mito, T. Miyata, Y. Nakada, S. Nishiura, K. Onda, Y. Qiu, T. Soyano, T. Tamagawa, K. Tarusawa, M. Tashiro, T. Yoshioka
Institutions: National Central University, RIKEN, Saitama University, Kyoto University, The University of Tokyo, Tokyo Gakugei University, Chinese Academy of Sciences, National Astronomical Observatories, Nagoya University
Language: English
Open Access status: bronze
OpenAlex ID: W2014415029
FWCI: 2.498
Cites: 33
Cited by: 39
Related to: 10