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Pian, E.
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Article History
Received: 12 September 2017
Accepted: 19 September 2017
First Online: 16 October 2017
Change Date: 30 October 2017
Change Type: Correction
Change Details: In the version of this Letter originally published, in the third paragraph of the text Kyutoku et al. were not correctly cited and the sentence should have read: “As pointed out by Kyutoku at al.28, in the case of high optical depth to electron scattering (~1) and assuming spectral lines do not significantly depolarize the global emission, the linear polarization observed from the equatorial plane could be as high as a few per cent.” Also, in the Author contributions section, the final sentence should have read: “C.G.M. contributed to the writing of the paper.”
Competing interests
: The authors declare no competing financial interests.