L'-band AGPM vector vortex coronagraph's first light on LBTI/LMIRCam

D. Defrère; O. Absil; P. Hinz; J. Kuhn; D. Mawet; B. Mennesson; A. Skemer; K. Wallace; V. Bailey; E. Downey; C. Delacroix; O. Durney; P. Forsberg; C. Gomez; S. Habraken; W. F. Hoffmann; M. Karlsson; M. Kenworthy; J. Leisenring; M. Montoya; L. Pueyo; M. Skrutskie; J, Surdej

doi:10.1117/12.2057205

21 July 2014 L'-band AGPM vector vortex coronagraph's first light on LBTI/LMIRCam

D. Defrère, O. Absil, P. Hinz, J. Kuhn, D. Mawet, B. Mennesson, A. Skemer, K. Wallace, V. Bailey, E. Downey, C. Delacroix, O. Durney, P. Forsberg, C. Gomez, S. Habraken, W. F. Hoffmann, M. Karlsson, M. Kenworthy, J. Leisenring, M. Montoya, L. Pueyo, M. Skrutskie, J, Surdej

Author Affiliations +

Proceedings Volume 9148, Adaptive Optics Systems IV; 91483X (2014) https://doi.org/10.1117/12.2057205
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

We present the first observations obtained with the L'-band AGPM vortex coronagraph recently installed on LBTI/LMIRCam. The AGPM (Annular Groove Phase Mask) is a vector vortex coronagraph made from diamond subwavelength gratings. It is designed to improve the sensitivity and dynamic range of high-resolution imaging at very small inner working angles, down to 0.09 arcseconds in the case of LBTI/LMIRCam in the L' band. During the first hours on sky, we observed the young A5V star HR8799 with the goal to demonstrate the AGPM performance and assess its relevance for the ongoing LBTI planet survey (LEECH). Preliminary analyses of the data reveal the four known planets clearly at high SNR and provide unprecedented sensitivity limits in the inner planetary system (down to the diffraction limit of 0.09 arcseconds).

Citation Download Citation

D. Defrère, O. Absil, P. Hinz, J. Kuhn, D. Mawet, B. Mennesson, A. Skemer, K. Wallace, V. Bailey, E. Downey, C. Delacroix, O. Durney, P. Forsberg, C. Gomez, S. Habraken, W. F. Hoffmann, M. Karlsson, M. Kenworthy, J. Leisenring, M. Montoya, L. Pueyo, M. Skrutskie, and J, Surdej "L'-band AGPM vector vortex coronagraph's first light on LBTI/LMIRCam", Proc. SPIE 9148, Adaptive Optics Systems IV, 91483X (21 July 2014); https://doi.org/10.1117/12.2057205

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available