Rubin Observatory Commissioning Camera: summit integration

Stalder, B.; Reil, K.; Aguilar, Christian; Araya, Claudio; Borstad, Anthony; Bowdish, Boyd; Cho, Myung‐Haing; Cisneros, Stephen; Claver, C. F.; Constanzo, Julio; Corvetto, Giovanni; Drass, H.; Economou, Frossie; Dennihy, E.; Eisner, Alan B.; Fabrega, Juan; Neto, A. Fausti; Fisher-Levine, Merlin; Gónzalez, Iván; Harris, R. Alan; Hascall, Diane; Haupt, J.; Hoblitt, Josh; Howard, James D.; Huffer, Mike; Jenness, Tim; Mejías, David Jiménez; Johnson, Brian F. G.; Johnson, Tony; Krughoff, K. Simon; Lage, C.; Lange, Travis; Liang, Ming; López, Juan Carlos; Lopez, Margaux; Lupton, Robert H.; Maulen, Guido; Menanteau, F.; Mills, Neill; Morris, Glenn E.; Muñoz, Freddy; Neal, H. A.; Neill, Douglas R.; Newbry, Scott P.; Nomerotski, A.; Onoprienko, D.; Ordenes, Ian; Orellana, Juan; Osier, S.; Park, HyeYun; Pietrowicz, Stephen; Malagón, Andrés Alejandro Plazas; Poczulp, Gary; Qiu, Brian; Quint, Bruno; Reinking, Heinrich; Reuter, M.; Ribeiro, T.; Rojas, Rodrigo Guzmán; Romero, Sandra; Schindler, R. H.; Schoening, Bill; Sebag, Jacques; Shugart, Alysha; Silva, Cristian; Sotuela, I.; Tache, Anthony; Tapia, Diego; Thayer, J. G.; Thomas, Sandrine; Tighe, R.; Tsai, Tei-Wei; Turri, M.; Tyson, A.; Vergara, Luis; Walter, Christopher W.; Wiecha, Oliver; Xiong, Van

doi:10.1117/12.2630184

Ground-Based and Airborne Instrumentation for Astronomy IX 2022

DOI: 10.1117/12.2630184

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Rubin Observatory Commissioning Camera: summit integration

B. Stalder¹,

K. Reil

Christian Aguilar³

et al.

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2024

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Cited by 2 publications

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Integration and optical alignment of the Rubin Observatory Simonyi Survey Telescope with a laser tracker

Megias Homar,

Tighe,

Thomas

et al. 2024

Ground-Based and Airborne Telescopes X

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Precision in optical alignment is crucial for optimizing image quality in astronomical telescopes, particularly for wide-field survey telescopes such as the Vera C. Rubin Observatory, which will conduct the Legacy Survey of Space and Time (LSST). This paper explores the deployment and efficacy of laser tracker technology, specifically the Leica AT960/930, in maintaining optical alignment of the Simonyi Survey Telescope within tens of microns. Initially suggested by Burge et al. in 2007, 1 laser tracker technology has been instrumental in several major telescopes and is a cornerstone of operations at the Rubin Observatory, marking it as one of the first widefield telescopes to implement such advanced metrology. Here, we detail the process and outcomes of employing this technology in its integration, initial setup, and preliminary operations. In particular, we present detailed results on the structural flexure of the telescope at varying elevations, the effects of gravitational dynamics on the alignment of optical components, and the overall impact of azimuth and camera rotation on misalignments. Furthermore, our findings demonstrate that the operation of the laser tracker within the Active Optics System (AOS) allows realigning components within stringent tolerances in a single step, achieving near-perfect initial alignment. These capabilities demonstrate that we can achieve the necessary alignment for astronomical observations and establish a new benchmark for optical alignment in future large astronomical facilities.

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Integration and optical alignment of the Rubin Observatory Simonyi Survey Telescope with a laser tracker

Megias Homar,

Tighe,

Thomas

et al. 2024

Ground-Based and Airborne Telescopes X

View full text Add to dashboard Cite

show abstract

Advancing the Vera C. Rubin Observatory active optics control system

Megias Homar,

Meyers,

Thomas

et al. 2024

Ground-Based and Airborne Telescopes X

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The Vera C. Rubin Observatory is poised to achieve its highly anticipated first light in early 2025, marking the start of an era of transformative observational capabilities. As the observatory nears its first light, the commissioning of the Active Optics System (AOS) becomes increasingly critical. Comprising an open-loop and a closed-loop component, the AOS delivers real-time corrections for the alignment and mirror surface perturbations, ensuring seeing-limited image quality across the 3.5-degree field of view.In this paper, we present a thorough examination of recent advancements in the AOS at the Rubin Observatory. We begin by detailing the enhancements in the open-loop system, focusing on the improvement of Look-Up Tables (LUTs) for the mirror bending modes and the alignment of optical elements. Next, we discuss the closed-loop control improvements, particularly our novel approach using double Zernike polynomials. This method addresses camera rotation by defining the sensitivity matrix and the reference wavefront with a double Zernike expansion, thereby improving the system's adaptability to varying observational conditions. Finally, we address improvements made to eliminate degeneracies within the system's degrees of freedom, and discuss the upcoming verification phases during on-sky testing with the Commissioning Camera (ComCam). 1Overall, these initial open-loop verifications and closed-loop algorithmic improvements not only mark significant progress towards full-system verification with LSST Camera, but also refine the capabilities of the AOS, which is key for maintaining long-term operational efficiency and achieving the required image quality.

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Rubin Observatory Commissioning Camera: summit integration

Cited by 2 publications

References 2 publications

Integration and optical alignment of the Rubin Observatory Simonyi Survey Telescope with a laser tracker

Integration and optical alignment of the Rubin Observatory Simonyi Survey Telescope with a laser tracker

Advancing the Vera C. Rubin Observatory active optics control system

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