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The Backup Program of the Dark Energy Spectroscopic Instrument’s Milky Way Survey

  • Authors: Arjun Dey, Sergey E. Koposov, Joan R. Najita, Andrew P. Cooper, B. T. Gänsicke, Adam D. Myers, A. Raichoor, Daniel J. Eisenstein, E. F. Schlafly, D. Schlegel, C. Allende Prieto, Leandro Beraldo e Silva, Ting S. Li, M. Valluri, Stéphanie Juneau, Mika Lambert, S. Li, Guillaume F. Thomas, Wenting Wang, Alexander H. Riley, N. Kizhuprakkat, J. Aguilar, S. Ahlen, S. Bailey, D. Bianchi, D. Brooks, T. Claybaugh, A. Cuceu, A. de la Macorra, J. Della Costa, Biprateep Dey, P. Doel, A. Font-Ribera, J. E. Forero-Romero, E. Gaztañaga, S. Gontcho A Gontcho, G. Gutierrez, J. Guy, C. Hahn, K. Honscheid, M. Ishak, J. Jimenez, R. Kehoe, D. Kirkby, T. Kisner, A. Kremin, C. Lamman, M. Landriau, L. Le Guillou, M. E. Levi, M. Manera, P. Martini, A. Meisner, R. Miquel, J. Moustakas, S. Nadathur, N. Palanque-Delabrouille, W. J. Percival, I. Pérez-Ràfols, F. Prada, G. Rossi, E. Sanchez, M. Schubnell, J. Silber, D. Sprayberry, G. Tarlé, B. A. Weaver, R. H. Wechsler, R. Zhou, H. Zou

Arjun Dey et al 2026 The Astronomical Journal 171 .

  • Provider: AAS Journals

Caption: Figure 16.

Comparison of the photometrically derived metallicities in the PRISTINE DR1 catalog (N. F. Martin et al. 2024) with the spectroscopic metallicity estimates from the MWBP observations of the same stars based on the RVS (left) and SP (right) pipelines as reported in the DESI DR1 Stellar Catalog (S. E. Koposov et al. 2024; DESI Collaboration et al. 2026; S. Koposov et al. 2026). The solid red line in both panels is a 1–1 line, not a fit.

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