2006/11/10 by K. Y. Huang, Y. Urata, P. H. Kuo +28
Mathematics · Physics and Astronomy · #Afterglow #Astro and Planetary Science #Astrophysics #Blue light #Chromatic scale #Gamma-ray burst #Gamma-ray bursts and supernovae #Light curve #Mathematics #Optics #Physics #Power law #Statistics #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1086/510737
published as Astrophys.J.654:L25-L28,2006 · 14 pages, 2 figures, accpeted for publication in ApJL
arxiv created 2006/11/10 · openalex publication_date 2006/12/07 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.