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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 3 CONTRIBUTI IN ATTI DI CONVEGNO (Proceedings)
  4. 3.01 Contributi in Atti di convegno
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/28532
Title: SHARK-NIR coronagraphic simulations: performance dependence on the Strehl ratio
Authors: CAROLO, ELENA 
Vassallo, Daniele 
JACOPO, FARINATO 
UMBRIACO, GABRIELE
RAGAZZONI, Roberto 
PORTALURI, ELISA 
DIMA, MARCO 
CHINELLATO, SIMONETTA 
BIONDI, FEDERICO 
VIOTTO, VALENTINA 
STANGALINI, MARCO 
PUGLISI, Alfio Timothy 
PINNA, Enrico 
MESA, DINO 
MARAFATTO, Luca 
MAGRIN, DEMETRIO 
GREGGIO, DAVIDE 
D'ORAZI, VALENTINA 
DE PASCALE, Marco 
Carolotti, Alexis
BERGOMI, Maria 
AGAPITO, GUIDO 
Issue Date: 2018
Volume: Optical and Infrared Interferometry and Imaging VI
Editors: Malbet, Fabien; Creech-Eakman, Michelle J.; Tuthill, Peter G.
Series: PROCEEDINGS OF SPIE 
Abstract: SHARK-NIR is a coronagraphic camera that will be implemented at the Large Binocular Telescope. SHARK-NIR will offer extreme AO direct imaging capability on a field of view of about 18" x 18", and a simple coronagraphic spectroscopic mode offering spectral resolution ranging from 100 to 700. In order to meet the SHARK-NIR main scientific driver, i.e., searching for giant planets on wide orbits, a high contrast is necessary. A set of corona-graphic masks were tested, we selected the best performing configurations for the instrument: the Gaussian-Lyot coronagraph, a Shaped Pupil (SP) with 360° of discovery space and two SP masks with asymmetric detection area but with a small inner working angle and the Four Quadrant phase mask. Many simulations were performed to obtain the performance in different atmospheric conditions, including seeing variations, by using magnitude guide star from R = 8 to R = 14 and testing also the jitter value. These changes in simulation parameters reflected a variation in the corona-graphic performance. We analysed the simulation images by searching the best post processing to obtain the best performance for the coronagraph, moreover, we have taken account the fact that using, in the ADI technique, small subsets to generate the reference PSF can help attenuating the speckle noise, but it also results in a growing risk of planet removal if not enough field rotation occurs in the subset itself. We analysed the results after this effect is included, so the performances were shown as function of the Strehl Ratio condition to obtain mass and age limits for the detection of the planets.
Conference Name: Optical and Infrared Interferometry and Imaging VI
Conference Place: Austin, Texas, United States
Conference Date: 10-15 June, 2018
URI: http://hdl.handle.net/20.500.12386/28532
URL: https://www.spiedigitallibrary.org/conference-proceedings-of-spie/10701/2312553/SHARK-NIR-coronagraphic-simulations--performance-dependence-on-the-Strehl/10.1117/12.2312553.short
ISSN: 0277-786X
ISBN: 9781510619555
9781510619562
DOI: 10.1117/12.2312553
Bibcode ADS: 2018SPIE10701E..2BC
Fulltext: open
Appears in Collections:3.01 Contributi in Atti di convegno

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