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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 1.

False color images of SN 2025ogs and its host galaxy using F150W (blue), F200W (green), and F356W (red). The left panel is the template image obtained from the PRIMER program (PID 1837; J. S. Dunlop et al. 2021) and the right panel is our discovery image from COSMOS-3D (PID 5893). The SN is well separated from its host galaxy at a projected distance of 8.1 kpc.

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