Figure 1.
The polarization spectra of iPTF 13bvn from −10 d to +36 d relative to the r-band maximum. At each epoch, the flux spectra (log10(Fλ)) are shown by the thick grey lines and are corrected for the recessional velocity of the host galaxy (1359 km s−1, as quoted by NED). The flux spectrum from the spectroscopic observations at +61 d is also shown in the bottom panel. The horizontal bars indicate the wavelength regions used to measure the continuum polarization.
