2002/06/26 by D. Bersier, B. A. McLeod, B. McLeod +19 · 1 citation
Physics and Astronomy · #Astro and Planetary Science #Gamma-ray bursts and supernovae #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1086/368158
published as Astrophys.J. 583 (2003) L63-L66 · submitted to ApJL
arxiv created 2002/06/26 · openalex publication_date 2003/01/17 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
We report polarization measurements and photometry for the optical afterglow of the gamma-ray burst GRB 020405. We measured a highly significant 9.9% polarization (in V band) 1.3 days after the burst and argue that it is intrinsic to the GRB. The light-curve decay is well fitted by a t -1.72 power law; we do not see any evidence for a break between 1.24 and 4.3 days after the burst. We discuss these measurements in the light of several models of GRB afterglows.