LVMAGP: SDSS-V local volume mapper acquisition and guiding package

Hojae Ahn; Florian Briegel; Mingyu Jeon; Tom Herbst; Sumin Lee; Inhwan Jung; Changgon Kim; Jimin Han; Geon Hee Kim; Wolfgang Gaessler; Markus Kuhlberg; Tae-Geun Ji; Hyun Chul Park; Soojong Pak; Nicholas P. Konidaris; Niv Drory; José Sanchez-Gallego; Cynthia S. Froning; Solange Ramirez; Juna A. Kollmeier

doi:10.1117/12.2628000

29 August 2022 LVMAGP: SDSS-V local volume mapper acquisition and guiding package

Hojae Ahn, Florian Briegel, Mingyu Jeon, Tom Herbst, Sumin Lee, Inhwan Jung, Changgon Kim, Jimin Han, Geon Hee Kim, Wolfgang Gaessler, Markus Kuhlberg, Tae-Geun Ji, Hyun Chul Park, Soojong Pak, Nicholas P. Konidaris, Niv Drory, José Sanchez-Gallego, Cynthia S. Froning, Solange Ramirez, Juna A. Kollmeier

Author Affiliations +

Proceedings Volume 12189, Software and Cyberinfrastructure for Astronomy VII; 121892E (2022) https://doi.org/10.1117/12.2628000
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

Sloan Digital Sky Survey fifth-generation (SDSS-V) Local Volume Mapper (LVM) is a wide-field IFU survey that uses an array of four 160 mm telescopes. It provides IFU spectra over the optical range with R ∼ 4,000 to reveal the inner components of galaxies and the evolution of the universe. Each telescope observes the science field or the calibration field independently, but all of them should be simultaneously synchronized with the science exposure. To minimize the moving parts, the LVM adopted the siderostat design with a field derotator. We designed the optimized control software for our LVM observation, lvmagp, which controls four focusers, three K-mirror derotators, one fiber selector, four mounts (siderostats), and seven guide cameras. It was built on its owen user interface and messaging protocol called actor and clu based on asynchronous programming. The lvmagp provides three key sequences: autofocus sequence, field acquisition sequence, and autoguide sequence. Also, we designed and fabricated the proto-model siderostat for the software test. The real sky test was made with proto-model siderostat, and the lvmagp showed arcsecond-level field acquisition and autoguide accuracy.

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Hojae Ahn, Florian Briegel, Mingyu Jeon, Tom Herbst, Sumin Lee, Inhwan Jung, Changgon Kim, Jimin Han, Geon Hee Kim, Wolfgang Gaessler, Markus Kuhlberg, Tae-Geun Ji, Hyun Chul Park, Soojong Pak, Nicholas P. Konidaris, Niv Drory, José Sanchez-Gallego, Cynthia S. Froning, Solange Ramirez, and Juna A. Kollmeier "LVMAGP: SDSS-V local volume mapper acquisition and guiding package", Proc. SPIE 12189, Software and Cyberinfrastructure for Astronomy VII, 121892E (29 August 2022); https://doi.org/10.1117/12.2628000

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