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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 18.

Spectra of 13,290 (primarily) stellar sources from the MWBP that were misclassified as spectral type GALAXY by the Redrock pipeline but for which the RVS pipeline found a good model fit. The sources are sorted by their effective temperature estimated by the RVS pipeline. Nearly all of the sources are stars, as evidenced by their (approximately) zero redshift absorption features. However, there are also several galaxies and QSOs visible within this set, which are identifiable by their emission signatures. The sources with the lowest estimated effective temperatures (Teff < 3000 K) are also likely sources with problematic RVS fits.

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