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Early time optical polarization of GRB Afterglows: GRB 060418 and GRB 090102

2009/12/17 by I. A. Steele, Steele, I. A., C. G. Mundell +7
Physics and Astronomy · #Astro and Planetary Science #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #Gamma-ray bursts and supernovae #High Energy Astrophysical Phenomena (astro-ph.HE) #Stellar, planetary, and galactic studies #astro-ph.CO #astro-ph.HE

paper · pdf · doi:10.48550/arxiv.0912.3391

To appear in proceedings of "The Shocking Universe" conference held in San Servolo, 2009

arxiv created 2009/12/17 · openalex publication_date 2009/12/17 · arxiv updated 2010/01/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

RINGO on the Liverpool Telescope has now measured the optical polarization of GRB 060418 (where a 2 sigma upper limit of P<8% was determined) and GRB 090102 (when a detection of P = 10 +/-1 % was made). We discuss the implications of these observations for the various competing models of GRB jet magnetization and describe a possible unified model that can explain both measurements.

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