Status of the GRAAL system development: very wide-field correction with 4 laser guide-stars

Paufique, J.; Argomedo, Javier; Arsenault, Robin; Conzelmann, Ralf; Donaldson, Rob; Hubin, N.; Jochum, L.; Jost, A.; Kiekebusch, M.; Kolb, Johann; Küntschner, H.; Louarn, Miska Le; Madec, Pierre-Yves; Siebenmorgen, R.; Tordo, Sebastien

doi:10.1117/12.927265

Cited by 8 publications

(5 citation statements)

References 10 publications

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“…LGSs asterism were installed on VLT (Very Large Telescope). GRAAL (HAWK-I) is a GLAO system which imaged at J, H, K band with 7.5arcmin FOV [49,50]. GALACSI can be operated at both GLAO and LTAO (laser tomography AO) mode [51].…”

Section: Lgs Aomentioning

confidence: 99%

Astronomical adaptive optics: a review

Rao,

Zhong,

Guo

et al. 2024

PhotoniX

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Since the concept of adaptive optics(AO) was proposed in 1953, AO has become an indispensable technology for large aperture ground-based optical telescopes aimed at high resolution observations. This paper provides a comprehensive review of AO progress for large aperture astronomical optical telescopes including both night-time and day-time solar optical telescopes. The recent AO technological advances, such as Laser Guide Star, Deformable Secondary Mirror, Extreme AO, and Multi-Conjugate AO are focused.

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Section: Lgs Aomentioning

confidence: 99%

Astronomical adaptive optics: a review

Rao,

Zhong,

Guo

et al. 2024

PhotoniX

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“…The system engineered by TOPTICA includes several servo systems enabling a power stability better than 2% over several hours and a fully maintenance-free operation (Arsenault et al 2012). Four units of the laser sources are currently forming the laser guide star asterism of the LGS facility at the UT4 VLT (Calia et al 2004), which feeds the GRAAL/HAWK-I (Paufique et al 2012) and the GALACSI/MUSE (Ströbele et al 2012;Laurent et al 2010) instruments.…”

Section: Metrology and Calibrationmentioning

confidence: 99%

Astrophotonics: astronomy and modern optics

Minardi¹,

Harris

Labadie

2021

Astron Astrophys Rev

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Much of the progress in astronomy has been driven by instrumental developments, from the first telescopes to fiber fed spectrographs. In this review, we describe the field of astrophotonics, a combination of photonics and astronomical instrumentation that is gaining importance in the development of current and future instrumentation. We begin with the science cases that have been identified as possibly benefiting from astrophotonic devices. We then discuss devices, methods and developments in the field along with the advantages they provide. We conclude by describing possible future perspectives in the field and their influence on astronomy.

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“…A paper giving a detailed status of the development of the GRAAL adaptive optics module can be found in [5].…”

Section: Graal Main Assembly Deliverymentioning

confidence: 99%

ESO adaptive optics facility progress report

et al. 2012

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The ESO Adaptive Optics Facility (AOF) consists in an evolution of one of the ESO VLT unit telescopes to a laser driven adaptive telescope with a deformable mirror in its optical train.The project has completed the procurement phase and several large structures have been delivered to Garching (Germany) and are being integrated (the AO modules GRAAL and GALACSI and the ASSIST test bench). The 4LGSF Laser (TOPTICA) has undergone final design review and a pre-production unit has been built and successfully tested. The Deformable Secondary Mirror is fully integrated and system tests have started with the first science grade thin shell mirror delivered by SAGEM. The integrated modules will be tested in stand-alone mode in 2012 and upon delivery of the DSM in late 2012, the system test phase will start. A commissioning strategy has been developed and will be updated before delivery to Paranal. A substantial effort has been spent in 2011-2012 to prepare the unit telescope to receive the AOF by preparing the mechanical interfaces and upgrading the cooling and electrical network. This preparation will also simplify the final installation of the facility on the telescope.A lot of attention is given to the system calibration, how to record and correct any misalignment and control the whole facility. A plan is being developed to efficiently operate the AOF after commissioning. This includes monitoring a relevant set of atmospheric parameters for scheduling and a Laser Traffic control system to assist the operator during the night and help/support the observing block preparation.

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Status of the GRAAL system development: very wide-field correction with 4 laser guide-stars

Cited by 8 publications

References 10 publications

Astronomical adaptive optics: a review

Astronomical adaptive optics: a review

Astrophotonics: astronomy and modern optics

ESO adaptive optics facility progress report

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