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Broad-band polarimetric investigation of the Type II-plateau supernova 2013ej

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dc.contributor.author Brajesh Kumar
dc.contributor.author Pandey, S. B
dc.contributor.author Eswaraiah, C
dc.contributor.author Kawabata, K. S
dc.date.accessioned 2020-11-19T14:03:12Z
dc.date.available 2020-11-19T14:03:12Z
dc.date.issued 2016-03
dc.identifier.citation Monthly Notices of the Royal Astronomical Society, Vol. 456, No. 3, pp. 3157-3167 en_US
dc.identifier.issn 1365-2966
dc.identifier.uri http://prints.iiap.res.in/handle/2248/7295
dc.description Restricted Access © Royal Astronomical Society http://dx.doi.org/10.1093/mnras/stv2720 en_US
dc.description.abstract We present results based on follow-up observations of the Type II-plateau supernova (II-P SN) 2013ej at six epochs spanning a total duration of ∼ 37 d. The R C -band linear polarimetric observations were carried out between the end of the plateau and the beginning of the nebular phase, as demarcated in the photometric light-curve. The contribution arising from interstellar polarization (ISP) was constrained using two approaches, namely based on observations of foreground stars lying within a 5-arcmin and a 10 ◦ radius of the SN location, and by investigating the extinction arising from the Milky Way and host galaxy in the direction of the SN. Our analysis revealed that in general the intrinsic polarization of the SN was higher than the polarization values for the foreground stars and exhibited an increasing trend during our observations. After correcting for the ISP of ∼ 0.6 per cent,the maximum intrinsic polarization of SN 2013ej was found to be 2.14 ± 0.57 per cent. Such a strong polarization has rarely been seen in II-P SNe. If this procedure is justified (i.e. the ‘polarization bias’ effect is indeed negligible) the polarization could be caused by the asymmetry of the inner ejecta of the SN, because the ISP towards the SN location is estimated to be, at most, 0.6 per cent. en_US
dc.language.iso en en_US
dc.publisher Oxford University Press on behalf of the Royal Astronomical Society en_US
dc.subject Techniques: polarimetric en_US
dc.subject Supernovae: general en_US
dc.subject Supernovae: individual: SN 2013ej en_US
dc.subject Galaxies: individual: NGC 628 en_US
dc.title Broad-band polarimetric investigation of the Type II-plateau supernova 2013ej en_US
dc.type Article en_US

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