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A Natural ≳100× Telescope: Discovery of the Strongly Lensed Type II SN 2025mkn at z = 1.37

  • Authors: Cameron Lemon, Ariel Goobar, Joel Johansson, Edvard Mörtsell, Steve Schulze, Igor Andreoni, Aleksandra Bochenek, Seán J. Brennan, Malte Busmann, Michael Coughlin, Kaustav K. Das, Suhail Dhawan, Christoffer Fremling, Anjasha Gangopadhyay, Daniel Gruen, Xander J. Hall, Anna Y. Q. Ho, Mansi M. Kasliwal, Daniel A. Perley, Mickael Rigault, Genevieve Schroeder, Mathew Smith, Jesper Sollerman, Jean J. Somalwar, Robert Stein, Stephen Thorp, Alice Townsend, Jacob L. Wise, Lin Yan, Nikki Arendse, Eric C. Bellm, Tracy X. Chen, Andrew Drake, Frank J. Masci, Josiah Purdum, Roger Smith, Jason T. Hinkle, T. Emil Rivera-Thorsen, Benjamin J. Shappee, Michael A. Tucker, Jessica Aguilar, Steven Ahlen, Greg Aldering, Segev BenZvi, Davide Bianchi, David Brooks, Todd Claybaugh, Axel de la Macorra, John Della Costa, Arjun Dey, Peter Doel, Brenna Flaugher, Andreu Font-Ribera, Jaime E. Forero-Romero, Enrique Gaztañaga, Satya Gontcho A. Gontcho, Gaston Gutierrez, Dragan Huterer, Mustapha Ishak, Jorge Jimenez, Dick Joyce, Stephanie Juneau, Robert Kehoe, Alex G. Kim, David Kirkby, Theodore Kisner, Anthony Kremin, Ofer Lahav, Martin Landriau, Laurent Le Guillou, Michael E. Levi, Marc Manera, Aaron Meisner, Ramon Miquel, John Moustakas, Seshadri Nadathur, Brendan O'Connor, Nathalie Palanque-Delabrouille, Antonella Palmese, Will J. Percival, Ignasi Pérez-Ràfols, Claire Poppett, Francisco Prada, Graziano Rossi, Eusebio Sanchez, David Schlegel, Michael Schubnell, Arman Shafieloo, Joseph Silber, David Sprayberry, Gregory Tarlé, Benjamin A. Weaver, Hu Zou

Cameron Lemon et al 2026 The Astrophysical Journal Letters 1003 .

  • Provider: AAS Journals

Caption: Figure 2.

Left panel: compilation of ground-based (circles) and JWST (square symbols) photometric observations of SN 2025mkn (Image A). The solid lines show the lightcurves of SN 2023ixf in matching rest-frame filters or synthetic photometry on spectra indicated in the legend. The star symbols and dashed lines show the photometry for image B (shifted both in time and magnitude, corresponding to a fiducial time delay and differential magnification). The observation dates of the spectra are marked along the top with "S" symbols. Right panel: optical and near-IR spectra (black lines) of SN 2025mkn (Image A). The shaded red lines show SN 2023ixf redshifted and scaled to match SN 2025mkn with magnifications of 250 and 15 (for A and B respectively) at similar phases (reported in rest-frame days). The blue line is a combined Keck/LRIS and JWST/NIRSpec spectrum of the lens galaxy.

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