BVRI Photometry of the Classic Type II-P Supernova 2017eaw in NGC 6946: Day 3 to Day 594

Abstract

Broadband $BVRI$ light curves of SN 2017eaw in NGC 6946 reveal the classic elements of a Type II-P supernova. The observations were begun on 16 May 2017 (UT), approximately 1 day after the discovery was announced, and the photometric monitoring was carried out over a period of nearly 600 days. The light curves show a well-defined plateau and an exponential tail which curves slightly at later times. An approximation to the bolometric light curve is derived and used to estimate the amount of ${}^{56}$Ni created in the explosion; from various approaches described in the literature, we obtain $M$(${}^{56}\mathrm{Ni}$) = 0.115 ($-$0.022,+0.027)$M_{\odot }$. We also estimate that 43\% of the bolometric flux emitted during the plateau phase is actually produced by the ${}^{56}$Ni chain. Other derived parameters support the idea that the progenitor was a red supergiant.

16 pages with 11 figures; accepted by Monthly Notices of the Royal Astronomical Society

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• Optical and infrared observations of the Type IIP SN2002hh from day 3 to 397
• The Type II-P Supernova 2017eaw: from explosion to the nebular phase
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• Probing the Final-stage Progenitor Evolution for Type IIP Supernova 2017eaw in NGC 6946
• The Remote Observatories of the Southeastern Association for Research in Astronomy (SARA)
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• Episodically Active Asteroid 6478 Gault
• The distance, supernova rate and supernova progenitors of NGC 6946
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• The Iron Yield of Normal Type II Supernovae
• Detection of Late-Time Circumstellar Interaction of SN 2017eaw in NGC 6946
• The morphing of decay powered to interaction powered Type II supernova ejecta at nebular times
• Progenitor properties of type II supernovae: fitting to hydrodynamical models using Markov chain Monte Carlo methods
• Type II-P Supernova Progenitor Star Initial Masses and SN 2020jfo: Direct Detection, Light Curve Properties, Nebular Spectroscopy, and Local Environment
• The Late Time Optical Evolution of Twelve Core-Collapse Supernovae: Detection of Normal Stellar Winds
• Are stripped envelope supernovae really deficient in ${}^{56}$Ni?
• A Snapshot Survey of Nearby Supernovae with the Hubble Space Telescope
• SN 2023ixf: interaction signatures in the spectrum at 445 days
• SN 2019va: A Type IIP Supernova with Large Influence of Nickel-56 Decay on the Plateau-phase Light Curve