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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 3.

Best-fit BayeSN model to each of the observed filters and epochs for SN 2025ogs. The measured photometry is shown as circles with errors, and the shaded region represents the BayeSN model + fitting uncertainty. The epoch of our NIRSpec observation is noted by the dashed black vertical line.

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