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Title
Japanese: 
English:Polarization evolution of the GRB 020405 afterglow 
Author
Japanese: Covino, S., Malesani, D., Ghisellini, G., Lazzati, D., di Serego Alighieri, S., Stefanon, M., Cimatti, A., Della Valle, M., Fiore, F., Goldoni, P., 河合 誠之, Israel, G. L., Le Floc'h, E., Mirabel, I. F., Ricker, G., Saracco, P., Stella, L., Tagliaferri, G., Zerbi, F. M..  
English: Covino, S., Malesani, D., Ghisellini, G., Lazzati, D., di Serego Alighieri, S., Stefanon, M., Cimatti, A., Della Valle, M., Fiore, F., Goldoni, P., Kawai, N., Israel, G. L., Le Floc'h, E., Mirabel, I. F., Ricker, G., Saracco, P., Stella, L., Tagliaferri, G., Zerbi, F. M..  
Language English 
Journal/Book name
Japanese: 
English:Astronomy and Astrophysics 
Volume, Number, Page Vol. 400        pp. L9-L12
Published date Mar. 2003 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
DOI https://doi.org/10.1051/0004-6361:20030133
Abstract Polarization measurements for the optical counterpart to GRB 020405 are presented and discussed. Our observations were performed with the VLT-UT3 (Melipal) during the second and third night after the gamma-ray burst discovery. The polarization degree (and the position angle) appears to be constant between our two observations at a level around 1.5/2%. The polarization can be intrinsic but it is not possible to unambiguously exclude that a substantial fraction of it is induced by dust in the host galaxy. Based on observations made with ESO telescopes at the Paranal Observatory under programme Id 69.D-0461.

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