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Astrometric Calibration and Performance of the Dark Energy Spectroscopic Instrument Focal Plane

  • Authors: S. Kent, E. Neilsen, K. Honscheid, D. Rabinowitz, E. F. Schlafly, J. Guy, D. Schlegel, J. García-Bellido, T. S. Li, E. Sanchez, J. Silber, J. Aguilar, S. Ahlen, D. Brooks, T. Claybaugh, A. de la Macorra, P. Doel, D. J. Eisenstein, K. Fanning, A. Font-Ribera, J. E. Forero-Romero, S. Gontcho A. Gontcho, J. Jimenez, D. Kirkby, T. Kisner, A. Kremin, M. Landriau, L. Le Guillou, M. E. Levi, C. Magneville, M. Manera, P. Martini, A. Meisner, R. Miquel, J. Moustakas, J. Nie, N. Palanque-Delabrouille, W. J. Percival, C. Poppett, M. Rezaie, A. J. Ross, G. Rossi, M. Schubnell, H. Seo, Gregory Tarlé, B. A. Weaver, R. Zhou, Z. Zhou, H. Zou

S. Kent et al 2023 The Astronomical Journal 166 .

  • Provider: AAS Journals

Caption: Figure 5.

Layout of guider GFAs on the DESI focal plane with various coordinate systems labeled. The parallactic angle ψ is the position angle of the zenith relative to the north. The position angle of a typical GFA relative to the zenith is marked as θ.

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