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A Multiwavelength View of the First Type Ic-BL Supernova with an Einstein Probe X-Ray Shock Breakout

  • Authors: Jillian C. Rastinejad, Gokul Srinivasaragavan, Nikhil Sarin, Tanner O'Dwyer, S. Bradley Cenko, James K. Leung, Anya E. Nugent, Daniel A. Perley, Genevieve Schroeder, Shreya Anand, Tomás Ahumada, Igor Andreoni, Aleksandra Bochenek, Alessandra Corsi, Christoffer Fremling, Anna Y. Q. Ho, Mansi M. Kasliwal, Geoffrey Mo, Anirudh Salgundi, Kendall I. Sippy, J. Sollerman, Eric C. Bellm, Tracy X. Chen, Michael W. Coughlin, Michael C. Davis, Fabio De Colle, Danielle Frostig, Christopher L. Fryer, Michael J. Graham, Xander J. Hall, K.-R. Hinds, Luca Izzo, Wynn Jacobson-Galán, Nathan P. Lourie, Keiichi Maeda, Josiah Purdum, Ben Rusholme, Avinash Singh, Robert Stein

Jillian C. Rastinejad et al 2026 The Astrophysical Journal Letters 1007 .

  • Provider: AAS Journals

Caption: Figure 8.

Magellan/FIRE near-IR spectrum of SN 2026gzf (bottom), compared to near-IR spectra of past Type Ic-BL SNe (F. Patat et al. 2001; S. Tinyanont et al. 2024; J. C. Rastinejad et al. 2025). We mask regions contaminated by telluric features. While we observe an absorption feature ∼1 μm, the expected 2 μm feature is not well detected in our FIRE spectrum due to low signal-to-noise, precluding a firm detection of He I.

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