The Polarization Variability in the Optical Afterglow of GRB 990712 | Zendy

G. Björnsson | Zendy; E. Lindfors | Zendy

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The Polarization Variability in the Optical Afterglow of GRB 990712

Author(s) -

G. Björnsson,

E. Lindfors

Publication year - 2000

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/312907

Subject(s) - afterglow , gamma ray burst , astrophysics , polarization (electrochemistry) , physics , position angle , astronomy , optics , chemistry , galaxy

In a recent paper, Rol and colleagues present evidence for a variablepolarization in the optical afterglow following the gamma-ray burst GRB 990712.The variation is highly significant, but the position angle appears timeindependent. Contrary to their conclusion, we point out that this can in factbe explained with existing afterglow models, namely that of a laterallyexpanding jet.Comment: 10 pages, 2 figures. Accepted for publication in ApJ Letter

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