Supernova SN 2020faa -- an iPTF14hls look-alike?
S. Yang, J. Sollerman, T.-W. Chen, E. C. Kool, R. Lunnan, S. Schulze,, N. Strotjohann, A. Horesh, M. Kasliwal, T. Kupfer, A. A. Mahabal, F. J., Masci, P. Nugent, D. A. Perley, R. Riddle, B. Rusholme, Y. Sharma

TL;DR
This paper reports on observations of SN 2020faa, a Type II supernova with a light curve similar to iPTF14hls, suggesting it may be a new case of this rare supernova type, and provides early data to understand its evolution.
Contribution
The study presents detailed optical observations of SN 2020faa, demonstrating its similarity to iPTF14hls and offering early constraints on its evolution and explosion epoch.
Findings
SN 2020faa shows a luminous, rebrightening light curve similar to iPTF14hls.
Spectral evolution confirms SN 2020faa as a Type II supernova.
Early observations provide better constraints on explosion timing than for iPTF14hls.
Abstract
We present observations of SN 2020faa. This Type II supernova displays a luminous light curve that started to rebrighten from an initial decline. We investigate this in relation to the famous supernova iPTF14hls, which received a lot of attention and multiple interpretations in the literature, however whose nature and source of energy still remains unknown. We demonstrate the great similarity between SN 2020faa and iPTF14hls during the first 6 months, and use this comparison both to forecast the evolution of SN 2020faa and to reflect on the less well observed early evolution of iPTF14hls. We present and analyse our observational data, consisting mainly of optical light curves from the Zwicky Transient Facility in the gri bands as well as a sequence of optical spectra. We construct colour curves, a bolometric light curve, compare ejecta-velocity and Black-body radius evolutions for the…
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