A comparison between different coronagraphic data reduction techniques

E. Carolo*, D. Vassallo, J. Farinato, M. Bergomi, M. Bonavita, A. Carlotti, V. D'Orazi, D. Greggio, D. Magrin, D. Mesa, E. Pinna, A. Puglisi, M. Stangalini, C. Verinaud, V. Viotto

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

4 Citations (Scopus)


A robust post processing technique is mandatory for analysing the coronagraphic high contrast imaging data. Angular Differential Imaging (ADI) and Principal Component Analysis (PCA) are the most used approaches to suppress the quasi-static structure presents in the Point Spread Function (PSF) for revealing planets at different separations from the host star. In this work, we present the comparison between ADI and PCA applied to System of coronagraphy with High order Adaptive optics from R to K band (SHARK-NIR), which will be implemented at Large Binocular Telescope (LBT). The comparison has been carried out by using as starting point the simulated wavefront residuals of the LBT Adaptive Optics (AO) system, in different observing conditions. Accurate tests for tuning the post processing parameters to obtain the best performance from each technique were performed in various seeing conditions (0:4-1) for star magnitude ranging from 8 to 12, with particular care in finding the best compromise between quasi static speckle subtraction and planets detection.

Original languageEnglish
Title of host publicationAdaptive Optics Systems V
EditorsEnrico Marchetti, Laird M. Close, Jean-Pierre Véran
Place of PublicationBellingham, WA
Number of pages13
ISBN (Electronic)9781510601987
ISBN (Print)9781510601970
Publication statusPublished - 2016
Externally publishedYes
EventAdaptive Optics Systems V - Edinburgh, United Kingdom
Duration: 26 Jun 20161 Jul 2016

Publication series

NameProceedings of SPIE
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherAdaptive Optics Systems V
Country/TerritoryUnited Kingdom


  • ADI
  • coronagraphy
  • exoplanets
  • PCA


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