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Probing the Origin of the Kilonova Candidate GRB 230307A: Analysis of Host Galaxy and Offset

Authors: Clecio R. Bom, Davi C. Rodrigues, Arianna Cortesi, Amanda E. Araujo-Carvalho, Daniel Ruschel-Dutra, Giuliano Iorio, Luidhy Santana-Silva, Charles D. Kilpatrick, Fabricio Ferrari, Luis Lomelí-Núñez, Thomas Harvey, Duncan Austin, Christopher J. Conselice, Nathan Adams, Roberto Cid Fernandes

Clecio R. Bom et al 2026 The Astrophysical Journal Letters 1001 .

Caption: Figure C2.

One-dimensional light-weighted distributions of stellar ages (left) and stellar metallicities (right), obtained from spectral fitting using pPXF.