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Kasliwal, Marie Aubert, Matthew Graham, Michael W. Coughlin, Nikolaus Z. Prusinski, Priscila J. Pessi, Samantha Wu, Sam Rose, S. Bradley Cenko, Sean J. Brennan, Shreya Anand, S. R. Kulkarni, Steve Schulze, Vikram Ravi, Viraj Karambelkar, Zeren Lin","submitted_at":"2024-03-13T01:31:36Z","abstract_excerpt":"We present SN 2023zaw $-$ a sub-luminous ($\\mathrm{M_r} = -16.7$ mag) and rapidly-evolving supernova ($\\mathrm{t_{1/2,r}} = 4.9$ days), with the lowest nickel mass ($\\approx0.002$ $\\mathrm{M_\\odot}$) measured among all stripped-envelope supernovae discovered to date. The photospheric spectra are dominated by broad He I and Ca NIR emission lines with velocities of $\\sim10\\ 000 - 12\\ 000$ $\\mathrm{km\\ s^{-1}}$. The late-time spectra show prominent narrow He I emission lines at $\\sim$1000$\\ \\mathrm{km\\ s^{-1}}$, indicative of interaction with He-rich circumstellar material. 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Miller, Annastasia Haynie, Ashish A. Mahabal, Avery Wold, Ben Rusholme, B. O'Connor, Chang Liu, Christoffer Fremling, Christopher Martin, Daniel A. Perley, Erica Hammerstein, Igor Andreoni, Io Kleiser, James D. Neill, Jesper Sollerman, Jim Fuller, Josiah Purdum, Kaustav K. Das, Kishalay De, K-Ryan Hinds, Lin Yan, Mansi M. Kasliwal, Marie Aubert, Matthew Graham, Michael W. Coughlin, Nikolaus Z. Prusinski, Priscila J. Pessi, Samantha Wu, Sam Rose, S. Bradley Cenko, Sean J. Brennan, Shreya Anand, S. R. Kulkarni, Steve Schulze, Vikram Ravi, Viraj Karambelkar, Zeren Lin","submitted_at":"2024-03-13T01:31:36Z","abstract_excerpt":"We present SN 2023zaw $-$ a sub-luminous ($\\mathrm{M_r} = -16.7$ mag) and rapidly-evolving supernova ($\\mathrm{t_{1/2,r}} = 4.9$ days), with the lowest nickel mass ($\\approx0.002$ $\\mathrm{M_\\odot}$) measured among all stripped-envelope supernovae discovered to date. 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