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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 10.

The global host-galaxy stellar mass (M*; left), sSFR (middle), and 12+log(O/H) metallicity (right) of SN 2026gzf (black dashed line) compared to the respective CDFs of the hosts of long GRBs (magenta; K. M. Svensson et al. 2010; D. A. Perley & R. A. Perley 2013; F. Y. Wang & Z. G. Dai 2014; Y. Niino et al. 2017), Type Ic-BL (blue), Ibc (green), and II (dark purple) SNe (Y.-J. Qin & A. Zabludoff 2024; A. E. Nugent et al. 2026). We also show the sSFR of the star-forming knot coincident with the location of SN 2026gzf (gray dotted line). The host itself is low mass, low metallicity, and star-forming, with properties that are overall more typical for long GRB hosts than the other transient host populations. The knot is extremely star-forming in comparison to the global host properties and other transient host populations.

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