SHARK-NIR: from K-band to a key instrument, a status update

Farinato, Jacopo; Bacciotti, F.; Baffa, C.; Baruffolo, A.; Bergomi, Maria; Bongiorno, A.; Carbonaro, Luca; Carolo, Elena; Carlotti, Alexis; Centrone, Mauro; Close, Laird M.; Pascale, Marco De; Dima, Marco; D’Orazi, V.; Esposito, Simone; Fantinel, D.; Farisato, G.; Gäessler, Wolfgang; Giallongo, E.; Greggio, Davide; Guyon, Olivier; Hinz, Philip M.; Lisi, F.; Magrin, Demetrio; Marafatto, Luca; Mohr, Lars; Montoya, Manny; Pedichini, Fernando; Pinna, Enrico; Puglisi, Alfio; Ragazzoni, Roberto; Salasnich, Bernardo; Stangalini, M.; Vassallo, Daniele; Vérinaud, Christophe; Viotto, Valentina

doi:10.1117/12.2233545

Cited by 8 publications

(5 citation statements)

References 4 publications

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“…18 Major observatories are investing in instruments that can perform these corrections, including but not limited to, Subaru's SCExAO, 19 the MagAO-2k upgrade, 20 and LBT's SHARK-VIS. 21 This trend towards commissioning high-density actuator spacing AO systems is expected to continue in ELTclass (and larger) telescopes. However, creating an AO system with high actuator density becomes increasingly difficult as the primary mirror size of the telescope grows and typical post-focal plane AO systems (or even secondary mirrors) lack enough space to pack actuators.…”

Section: High-density Actuator Spacing Ao Systemsmentioning

confidence: 99%

A Design Study on Adaptive Primaries for 1-2 Meter Class Telescopes

Fowler,

Bowens-Rubin,

Hinz

2021

Preprint

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Adaptive optics (AO) offers an opportunity to stabilize an image and maximize the spatial resolution achievable by ground based telescopes by removing the distortions due to the atmosphere. Typically, the deformable mirror in an AO system is integrated into the optical path between the secondary mirror and science instrument; in some cases, the deformable mirror is integrated into the telescope itself as an adaptive secondary mirror. However including the deformable mirror as the primary mirror of the telescope has been left largely unexplored due to the previous cost and complexity of large-format deformable mirror technology. In recent years this technology has improved, leaving deformable primary mirrors as a viable avenue towards higher actuator density and a simplification in testing and deploying adaptive optics systems. We present a case study to explore the benefits and trade-offs of integrating an adaptive optics system using the primary mirror of the telescope in small-to-mid-sized telescopes.

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Section: High-density Actuator Spacing Ao Systemsmentioning

confidence: 99%

A Design Study on Adaptive Primaries for 1-2 Meter Class Telescopes

Fowler,

Bowens-Rubin,

Hinz

2021

Preprint

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“…The LBT is a unique installation since it has two twin 8.4 m telescopes mounted on the same structure in a binocular setup, which can operate together in interferometric configuration (with a combined baseine of 22.8 m), or separately, even in dual configuration optical/interferometric [1]. The LBT houses advanced Adaptive Optics (AO) systems and, since the last decades, has pioneered the field of extreme-AO with the FLAO system [2], one of the first AO systems to operate with a Pyramid Wavefront Sensor (WFS), recently updated to SOUL [3], that feeds the camera LUCI [4], the Large Binocular Telescope Interferometer (LBTI) [5], and the upcoming extreme-AO SHARK-NIR [6] and SHARK-VIS [7]. The telescope has also an advanced Laser Guide Star facility to support Gound-Layer AO (GLAO) [8].…”

Section: Introductionmentioning

confidence: 99%

Characterization of LBT atmospheric and turbulence conditions in the context of ALTA project

Turchi

Masciadri²,

Veillet³

2022

Ground-Based and Airborne Telescopes IX

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ALTA project has been active since 2016, providing, at LBT observatory site, forecasts of atmospheric parameters, such as temperature, wind speed and direction, relative humidity and precipitable water vapor, and optical turbulence parameters, such as seeing, wavefront coherence time and isoplanatic angle with the final goal to support nightly the science operation of the LBT. Besides to the forecasts, during the years ALTA has been collecting statistics on the atmospheric conditions which can be used to draw a very accurate characterization of the climatology of the telescope site located on top of Mount Graham, Arizona. Such characterization can be used both for the optimization and calibration of the forecast model and as a reference for a model validation. The climatology of these parameters is conceived to be a further output of ALTA that will be upgraded on the website with time and it will be able to put in evidence trends at short as well as long time scales. In this contribution we present a climatological description of all the atmospheric parameters relevant for ground-based astronomy in order to provide to the scientific community a robust reference of the observing conditions at LBT. The study is performed using on-site measurements provided by DIMM and atmospheric sensors over several years and made available in the telescope telemetry data.

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“…SHARK is a coronagraphic camera proposed for Large Binocular Telescope in the framework of the 2014 Call for Proposals for Instrument Upgrades and New Instruments. [1][2][3][4] We are building this tool because first of all we hold an excellent adaptive optic (AO) performance, we are in the northern hemisphere with a strong scientific case and the purpose is going on sky in a very short time. In order to take advantage of these points we proposed a simple camera which will allow direct imaging, coronagraphic imaging and coronagraphic low resolution spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Data processing on simulated data for SHARK-NIR

Carolo¹,

Vassallo²,

Farinato³

et al. 2017

Proceedings of the Adaptive Optics for Extremely Large Telescopes 5

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A robust post processing technique is mandatory to analyse the coronagraphic high contrast imaging data. Angular Differential Imaging (ADI) and Principal Component Analysis (PCA) are the most used approaches to suppress the quasi-static structure in the Point Spread Function (PSF) in order to revealing planets at different separations from the host star. The focus of this work is to apply these two data reduction techniques to obtain the best limit detection for each coronagraphic setting that has been simulated for the SHARK-NIR, a coronagraphic camera that will be implemented at the Large Binocular Telescope (LBT). We investigated different seeing conditions (0.4" − 1") for stellar magnitude ranging from R=6 to R=14, with particular care in finding the best compromise between quasi-static speckle subtraction and planet detection.

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SHARK-NIR: from K-band to a key instrument, a status update

Cited by 8 publications

References 4 publications

A Design Study on Adaptive Primaries for 1-2 Meter Class Telescopes

A Design Study on Adaptive Primaries for 1-2 Meter Class Telescopes

Characterization of LBT atmospheric and turbulence conditions in the context of ALTA project

Data processing on simulated data for SHARK-NIR

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