27 July 2016 SHARK-NIR: from K-band to a key instrument, a status update
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Abstract
SHARK-NIR channel is one of the two coronagraphic instruments proposed for the Large Binocular Telescope, in the framework of the call for second generation instruments, issued in 2014. Together with the SHARK-VIS channel, it will offer a few observing modes (direct imaging, coronagraphic imaging and coronagraphic low resolution spectroscopy) covering a wide wavelength domain, going from 0.5μm to 1.7μm.

Initially proposed as an instrument covering also the K-band, the current design foresees a camera working from Y to H bands, exploiting in this way the synergy with other LBT instruments such as LBTI, which is actually covering wavelengths greater than L' band, and it will be soon upgraded to work also in K band. SHARK-NIR has been undergoing the conceptual design review at the end of 2015 and it has been approved to proceed to the final design phase, receiving the green light for successive construction and installation at LBT.

The current design is significantly more flexible than the previous one, having an additional intermediate pupil plane that will allow the usage of coronagraphic techniques very efficient in term of contrast and vicinity to the star, increasing the instrument coronagraphic performance. The latter is necessary to properly exploit the search of giant exo-planets, which is the main science case and the driver for the technical choices of SHARK-NIR. We also emphasize that the LBT AO SOUL upgrade will further improve the AO performance, making possible to extend the exo-planet search to target fainter than normally achieved by other 8-m class telescopes, and opening in this way to other very interesting scientific scenarios, such as the characterization of AGN and Quasars (normally too faint to be observed) and increasing considerably the sample of disks and jets to be studied.

Finally, we emphasize that SHARK-NIR will offer XAO direct imaging capability on a FoV of about 15"x15", and a simple coronagraphic spectroscopic mode offering spectral resolution ranging from few hundreds to few thousands. This article presents the current instrument design, together with the milestones for its installation at LBT.
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Jacopo Farinato, Jacopo Farinato, Francesca Bacciotti, Francesca Bacciotti, Carlo Baffa, Carlo Baffa, Andrea Baruffolo, Andrea Baruffolo, Maria Bergomi, Maria Bergomi, Angela Bongiorno, Angela Bongiorno, Luca Carbonaro, Luca Carbonaro, Elena Carolo, Elena Carolo, Alexis Carlotti, Alexis Carlotti, Mauro Centrone, Mauro Centrone, Laird Close, Laird Close, Marco De Pascale, Marco De Pascale, Marco Dima, Marco Dima, Valentina D'Orazi, Valentina D'Orazi, Simone Esposito, Simone Esposito, Daniela Fantinel, Daniela Fantinel, Giancarlo Farisato, Giancarlo Farisato, Wolfgang Gaessler, Wolfgang Gaessler, Emanuele Giallongo, Emanuele Giallongo, Davide Greggio, Davide Greggio, Olivier Guyon, Olivier Guyon, Philip Hinz, Philip Hinz, Franco Lisi, Franco Lisi, Demetrio Magrin, Demetrio Magrin, Luca Marafatto, Luca Marafatto, Lars Mohr, Lars Mohr, Manny Montoya, Manny Montoya, Fernando Pedichini, Fernando Pedichini, Enrico Pinna, Enrico Pinna, Alfio Puglisi, Alfio Puglisi, Roberto Ragazzoni, Roberto Ragazzoni, Bernardo Salasnich, Bernardo Salasnich, Marco Stangalini, Marco Stangalini, Daniele Vassallo, Daniele Vassallo, Christophe Verinaud, Christophe Verinaud, Valentina Viotto, Valentina Viotto, } "SHARK-NIR: from K-band to a key instrument, a status update", Proc. SPIE 9909, Adaptive Optics Systems V, 990931 (27 July 2016); doi: 10.1117/12.2233545; https://doi.org/10.1117/12.2233545
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