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

Defrère, D. and Absil, O. and Hinz, P. and Kühn, J. and Mawet, D. and Mennesson, B. and Skemer, A. and Wallace, K. and Bailey, V. and Downey, E. and Delacroix, C. and Durney, O. and Forsberg, P. and Gomez, C. and Habraken, S. and Hoffmann, W. F. and Karlsson, M. and Kenworthy, M. and Leisenring, J. and Montoya, M. and Pueyo, L. and Skrutskie, M. and Surdej, J. (2014) L'-band AGPM vector vortex coronagraph's first light on LBTI/LMIRCam. In: Adaptive Optics Systems IV. Proceedings of SPIE. No.9148. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 91483X. ISBN 9780819496164.

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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).

Item Type:Book Section
Related URLs:
URLURL TypeDescription Paper
Defrère, D.0000-0003-3499-2506
Absil, O.0000-0002-4006-6237
Hinz, P.0000-0002-1954-4564
Kühn, J.0000-0002-6344-4835
Mawet, D.0000-0002-8895-4735
Mennesson, B.0000-0003-4205-4800
Skemer, A.0000-0001-6098-3924
Bailey, V.0000-0002-5407-2806
Karlsson, M.0000-0002-2011-0851
Kenworthy, M.0000-0002-7064-8270
Leisenring, J.0000-0002-0834-6140
Pueyo, L.0000-0003-3818-408X
Surdej, J.0000-0002-7005-1976
Additional Information:2014 Society of Photo-Optical Instrumentation Engineers (SPIE). Date Published: 21 July 2014. LBTI is funded by a NASA grant in support of the Exoplanet Exploration Program (NSF 0705296). The LBT is an international collaboration among institutions in the United States, Italy and Germany. LBT Corporation partners are: The University of Arizona on behalf of the Arizona university system; Istituto Nazionale di Astro Fisica, Italy; LBT Beteiligungsgesellschaft, Germany, representing the Max-Planck Society, the Astrophysical Institute Potsdam, and Heidelberg University; The Ohio State University, and The Research Corporation, on behalf of The University of Notre Dame, University of Minnesota and University of Virginia. The research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement n.337569) and from the French Community of Belgium through an ARC grant for Concerted Research Actions. O.A. is a Research Associate of the F.R.S.-FNRS (Belgium).
Funding AgencyGrant Number
NASANSF 0705296
European Research Council (ERC)337569
Communauté française de Belgique – Actions de recherche concertéesUNSPECIFIED
Fonds de la Recherche Scientifique (FNRS)UNSPECIFIED
Subject Keywords:LBT, Adaptive Optics, coronagraphy, vortex phase mask, HR8799
Series Name:Proceedings of SPIE
Issue or Number:9148
Record Number:CaltechAUTHORS:20150521-105503591
Persistent URL:
Official Citation:D. Defrère ; O. Absil ; P. Hinz ; J. Kuhn ; D. Mawet, et al. " L'-band AGPM vector vortex coronagraph's first light on LBTI/LMIRCam ", Proc. SPIE 9148, Adaptive Optics Systems IV, 91483X (July 21, 2014); doi:10.1117/12.2057205;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:57738
Deposited On:21 May 2015 19:59
Last Modified:10 Nov 2021 21:54

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