SHARK-NIR: the coronagraphic camera for LBT in the AIV phase at INAF-Padova

Exo-Planets search and characterization has been the science case driving the SHARK-NIR design, which is one of the two coronagraphic instruments proposed for the Large Binocular Telescope. In fact, together with SHARK-VIS (working in the visible domain), it will offer the possibility to do binocular observations combining direct imaging, coronagraphic imaging and coronagraphic low resolution spectroscopy in a wide wavelength domain, going from 0.5μm to 1.7μm. Additionally, the contemporary usage of LMIRCam, the coronagraphic LBTI NIR camera, working from K to L band, will extend even more the covered wavelength range. The instrument has been designed with two intermediate pupil planes and three focal planes, in order to give the possibility to implement a certain number of coronagraphic techniques, with the purpose to select a few of them matching as much as possible the requirements of the different science cases in terms of contrast at various distances from the star and in term of required field of view. SHARK-NIR has been approved by the LBT board in June 2017, and the procurement phase started just after. We report here about the project status, which is currently at the beginning of the AIV phase at INAF-Padova, and should last about one year. Even if exo-planets is the main science case, the SOUL upgrade of the LBT AO will increase the instrument performance in the faint end regime, allowing to do galactic (jets and disks) and extra-galactic (AGN and QSO) science on a relatively wide sample of targets, normally not reachable in other similar facilities.

[1]  Bruce A. Macintosh,et al.  The Gemini Planet Imager: from science to design to construction , 2008, Astronomical Telescopes + Instrumentation.

[2]  James Roger P. Angel,et al.  The Large Binocular Telescope interferometer , 2003, SPIE Astronomical Telescopes + Instrumentation.

[3]  Olivier Guyon,et al.  SHARK (System for coronagraphy with High order Adaptive optics from R to K band): a proposal for the LBT 2nd generation instrumentation , 2014, Astronomical Telescopes and Instrumentation.

[4]  Laird M. Close,et al.  Into the blue: AO science with MagAO in the visible , 2014, Astronomical Telescopes and Instrumentation.

[5]  F. Pedichini,et al.  The solar system at 10 parsec: exploiting the ExAO of LBT in the visual wavelengths , 2014, Astronomical Telescopes and Instrumentation.

[6]  L. Busoni,et al.  Natural guide star adaptive optics systems at LBT: FLAO commissioning and science operations status , 2012, Other Conferences.

[7]  John M. Hill,et al.  Large Binocular Telescope project , 2000, Astronomical Telescopes + Instrumentation.

[8]  R. Ragazzoni,et al.  Sensitivity of a pyramidic Wave Front sensor in closed loop Adaptive Optics , 1999 .

[9]  Armando Riccardi,et al.  The adaptive secondary mirror for the Large Binocular Telescope: optical acceptance test and preliminary on-sky commissioning results , 2010, Astronomical Telescopes + Instrumentation.

[10]  Frantz Martinache,et al.  Wavefront control with the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) system , 2011, Optical Engineering + Applications.

[11]  S. Esposito,et al.  Pyramid Wavefront Sensor behavior in partial correction Adaptive Optic systems , 2001 .

[12]  R. Ragazzoni Pupil plane wavefront sensing with an oscillating prism , 1996 .

[13]  C. Vérinaud,et al.  Adaptive optics for high‐contrast imaging: pyramid sensor versus spatially filtered Shack–Hartmann sensor , 2005 .

[14]  Roberto Ragazzoni,et al.  The NIR arm of SHARK: System for coronagraphy with High-order Adaptive optics from R to K bands , 2014, International Journal of Astrobiology.

[15]  Roberto Ragazzoni,et al.  On-sky test of the pyramid wavefront sensor , 2003, SPIE Astronomical Telescopes + Instrumentation.

[16]  Roberto Ragazzoni,et al.  Status report of PYRAMIR: a near-infrared pyramid wavefront sensor for ALFA , 2004, SPIE Astronomical Telescopes + Instrumentation.

[17]  T. Fusco,et al.  UCLA Adaptive Optics for Extremely Large Telescopes 4 – Conference Proceedings Title SHARK-NIR Channel : a high contrast imager with coronagraphic capabilities for the Large Binocular Telescope Permalink , 2016 .

[18]  C. Fabron,et al.  Direct detection of giant extrasolar planets with SPHERE on the VLT , 2010 .