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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 3.

Close-up view of GFA assembly, showing the location of the two GIFs attached to each assembly. The layout of the pinhole pattern is also shown. Pinholes are 10 μm in diameter. Out of 10 such assemblies around the periphery of the DESI focal plane, six are used for guiding and field acquisition (the others being used for focus and alignment).

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