Extended Data Fig. 7: Comparisons of the reconstructed SN light curve with early UV light curves from other SNe.
From: Shock cooling of a red-supergiant supernova at redshift 3 in lensed images
a, The early-time evolution of the effective blackbody temperature of the SN reported here (green data points, where error bars are 68% confidence intervals), where the effective temperatures of the SN images are obtained by independently fitting the blackbody emission into the photometry of each SN image. The green solid line is from the best-fit RSG model. Red and blue dashed lines are two examples from the RSG model with progenitor radius of 200R⊙ and 1,000R⊙, respectively, for the same envelope mass and shock velocity from our best-fit RSG model for the SN reported here. Red, yellow, blue and cyan data points show the early-time evolution of SN 2018fif14 (type IIP), SN 2013ej6 (type IIP/L), SN 2017eaw11,12 (type IIP), SN 1987A80 and SN 2016gkg7,8,9,10 (type IIb). b–f, Stars and solid curves show the absolute magnitude of the SN reported here and reconstructed light curves from the best-fit RSG model, respectively, with arbitrary magnitude offsets for better visualization. For this SN, orange, teal and purple points and lines are for ACS-WFC F814W, WFC3-IR F110W and WFC3-IR F160W, respectively. In the rest frame of the SN, central wavelengths of these three filters fall into the B, UVW1, and UVW2 bands of Swift-UVOT. In b, we compare the SN’s early light curve to the Swift-UVOT observations of SN 2018fif14 and SN 2021yja81—two type-II SNe whose early light curves indicate only small amounts of CSM around their progenitors14,81. c,d, Comparison to the two type-II SNe, SN 2013fs82 and ASASSN-14gm83, which are believed to have dense CSM shells around their progenitors. In c,d, we plot the light curve from our best-fit CSM-homologous model for the SN of this work (dash-dotted lines) and light curves from the CSM-homologous model for the CSM radius and mass given by the analyses of CSM-rich CCSNe28,29 (dotted lines) for the two type-II SNe. e,f, Comparisons to the early UV light curves of SN 2016gkg8 (type IIb), SN 2020bvc84 (type Ib/c), SN 2018gv85 (type Ia), and ZTF18abvkwla86 (fast blue optical transient). ZTF-g band light curve is shown for ZTF18abvkwla at z = 0.27, corresponding to the rest-frame wavelength of 3,820 Å. All magnitudes are AB magnitudes. BB, blackbody.
