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SN 2024iss: A Multiwavelength Exposé of a Type IIb Supernova with an Early-time Ultraviolet Spectrum and Shock-breakout Constraints

Authors: R. J. Yete, W. V. Jacobson-Galán, Ferdinand, L. Dessart, M. M. Kasliwal, K. W. Davis, A. L. Piro, V. A. Villar, I. Andreoni, K. Auchettl, K. C. Chambers, R. Chornock, M. W. Coughlin, D. A. Coulter, R. Dekany, R. J. Foley, O. D. Fox, L. Galbany, C. Gall, A. Gangopadhyay, J. A. Goldberg, G. Govindaraj, X. Guo, M. E. Huber, J. Castaneda Jaimes, J. Karcheski, R. Kaur, C. D. Kilpatrick, R. R. Laher, N. LeBaron, C.-C. Lin, R. Margutti, Y.-C. Pan, K. C. Patra, H. M. L. Perkins, P. J. Pessi, O. Pyshna, A. Rest, S. Romagnoli, S. Schulze, H. Sears, A. Sedgewick, M. R. Siebert, A. Singh, J. Sollerman, N. Sravan, S. Tinyanont, R. J. Wainscoat, Q. Wang, D. Warshofsky, Y. Yao, Y. Zenati

R. J. Yete et al 2026 The Astrophysical Journal 1009 .

Provider: AAS Journals

Caption: Figure 4.

Left: early-time r-band photometry of SNe IIb 2016gkg (C. D. Kilpatrick et al. 2017; L. Tartaglia et al. 2017; M. C. Bersten et al. 2018), 2013df (A. Morales-Garoffolo et al. 2014), 1993J (S. E. Woosley et al. 1994), 2011dh (M. C. Bersten et al. 2012), and 2024iss. The complete ZTF SN IIb sample (K. R. Hinds et al. 2026, in preparation) is shown as red lines. All data points are corrected for extinction. Right: the SN 2024iss g-band light curve (green circles) compared to that of 2016gkg (orange stars). The complete ZTF SN IIb sample is shown as green lines.

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