Time-series of UV-wavelength spectroscopy of SN 2011iv obtained with Swift (purple) and HST (blue) over the course of nearly a month beginning 5 d before maximum brightness. Smoothed versions of the Swift spectra are presented in black. The insets are close-up views of the wavelength ranges 1700–3000 (left) and 2900–3900 (right), comparing the 0 d spectrum of SN 2011iv to the 0 d spectra of SN 2011fe (pink; Mazzali et al. 2014) and SN 2013dy (green; Pan et al. 2015). The light-blue vertical areas mark the regions fλ (2770) and fλ (2900), which define the UV ratio (see Appendix A). The green and blue shaded regions indicate the area enclosed by the pseudo-equivalent widths defined as pW01 and pW02, respectively (Sect. 5.1.2).
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.