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SN 2025ogs: A Spectroscopically Normal Type Ia Supernova at z = 2 as a Benchmark for Redshift Evolution

  • Authors: M. R. Siebert, J. D. R. Pierel, M. Engesser, D. A. Coulter, C. DeCoursey, O. D. Fox, A. Rest, W. Chen, J. M. DerKacy, E. Egami, R. J. Foley, D. O. Jones, K. Kakiichi, A. M. Koekemoer, Z. G. Lane, C. Larison, D. C. Leonard, T. J. Moriya, E. Padilla Gonzalez, R. M. Quimby, K. Shukawa, L. G. Strolger, Yossef Zenati

M. R. Siebert et al 2026 The Astrophysical Journal Letters 1002 .

  • Provider: AAS Journals

Caption: Figure 2.

Comparison of our NIRSpec prism spectrum of SN 2025ogs (black) to SN 2011fe (blue) at 3.4 days after peak brightness. The spectrum of SN 2011fe has been convolved with the prism dispersion function, rebinned, and scaled to match the observation.

(The data used to create this figure are available in the online article.)

(The data used to create this figure are available.)

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