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EP260321a/SN 2026gzf: The Faintest Shock Breakout Associated with a Broad-lined Supernova

  • Authors: Brendan O'Connor, Xander J. Hall, Malte Busmann, Daniel Gruen, Alberto Floris, Tomás Cabrera, Ziyuan Zhu, Antonella Palmese, Dylan Green, John Banovetz, Julius Gassert, Christopher L. Fryer, Roberto Ricci, Eleonora Troja, Surya Shivaprasad, Gregory R. Zeimann, Ariel J. Amsellem, Stephen Bailey, Segev BenZvi, Simone Dichiara, Hendrik van Eerten, Jeremy Hare, Lei Hu, Christopher M. Irwin, Keerthi Kunnumkai, Konstantin Malanchev, Mitra Maleki, Michael J. Moss, Adam D. Myers, Dheeraj Pasham, Christoph Ries, Geoffrey Ryan, David Schlegel, Michael Schmidt, Silona Wilke, Yu-Han Yang

Brendan O’Connor et al 2026 The Astrophysical Journal Letters 1006 .

  • Provider: AAS Journals

Caption: Figure 10.

Velocity evolution of SNe Ic-BL (gray) and GRB-SN Ic-BL black) from G. Finneran et al. (2025a) to SN 2026gzf (red). The left panel shows the evolution of Fe IIλ5169, and the right panel shows Si IIλ6355. Velocities for SN 2008D are reproduced from P. A. Mazzali et al. (2008) and D. Malesani et al. (2009).

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