Skip navigation
  • INAF logo
  • Home
  • Communities
    & Collections
  • Research outputs
  • Researchers
  • Organization units
  • Projects
  • Explore by
    • Research outputs
    • Researchers
    • Organization units
    • Projects
  • Login:
    • My DSpace
    • Receive email
      updates
    • Edit Account details
  • Italian
  • English

  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/20.500.12386/24588
Title: The ZIMPOL high contrast imaging polarimeter for SPHERE: polarimetric high contrast commissioning results
Authors: Roelfsema, Ronald
Bazzon, Andreas
Schmid, Hans Martin
Pragt, Johan
Govaert, Alain
Gisler, Daniel
Dominik, Carsten
BARUFFOLO, Andrea 
Beuzit, Jean-Luc
Costille, Anne
Dohlen, Kjetil
Downing, Mark
Elswijk, Eddy
de Haan, Menno
Hubin, Norbert
Kasper, Markus
Keller, Christoph
Lizon, Jean-Louis
Mouillet, David
Pavlov, Alexey
Puget, Pascal
SALASNICH, Bernardo 
Sauvage, Jean-Francois
Wildi, Francois
Issue Date: 2016
Volume: Adaptive Optics Systems V
Editors: Marchetti, Enrico; Close, Laird M.; Véran, Jean-Pierre
Series: PROCEEDINGS OF SPIE 
Number: 9909
First Page: 990927
Abstract: SPHERE (Spectro-Polarimetric High-contrast Exoplanet Research) is a second generation VLT instrument aimed at the direct detection of exo-planets. It has received its first light in May 2014. ZIMPOL (Zurich Imaging Polarimeter) is the imaging polarimeter subsystem of the SPHERE instrument. It's capable of both high accuracy and high sensitivity polarimetry but can also be used as a classical imager. It is located behind an extreme AO system and a stellar coronagraph. ZIMPOL operates at visible wavelengths which is best suited to detect the very faint reflected and hence polarized visible light from extra solar planets. During the SPHERE fourth commissioning period (October 2014) we have made deep coronagraphic observations of the bright star alpha Gru (mR = 1.75) to assess the high contrast polarimetric performance of SPHERE-ZIMPOL. We have integrated on the target for a total time of about 45 minutes during the meridian transit in the Very Broad Band filter (600 - 900 nm) with a classical Lyot coronagraph with 3 λ/D radius focal mask. We reduce the data by a combination of Polarized Background subtraction, Polarimetric Differential Imaging (PDI) and Angular Differential Imaging (ADI). We reach contrasts of 10-6 and 10-7 at a radial distances of respectively 7 and 14 lambda/D from the PSF core. At these radial distances we are respectively a factor of 10 and 2 above the photon noise limit. We discuss our results by considering the temporal and spatial speckle behavior close to the PSF core in combination with low order polarimetric aberrations. <P />
Conference Name: Adaptive Optics Systems V
Conference Place: Edinburgh, UK
Conference Date: 26 June-1 July, 2016
URI: http://hdl.handle.net/20.500.12386/24588
URL: https://www.spiedigitallibrary.org/conference-proceedings-of-spie/9909/990927/The-ZIMPOL-high-contrast-imaging-polarimeter-for-SPHERE--polarimetric/10.1117/12.2231883.short
ISSN: 0277-786X
ISBN: 9781510601970
DOI: 10.1117/12.2231883
Bibcode ADS: 2016SPIE.9909E..27R
Fulltext: open
Appears in Collections:3.01 Contributi in Atti di convegno

Files in This Item:
File Description SizeFormat 
990927.pdfpdf editoriale992.74 kBAdobe PDFView/Open
Show full item record

Page view(s)

18
checked on Feb 28, 2021

Download(s)

3
checked on Feb 28, 2021

Google ScholarTM

Check

Altmetric


Items in DSpace are published in Open Access, unless otherwise indicated.


Explore by
  • Communities
    & Collections
  • Research outputs
  • Researchers
  • Organization units
  • Projects

Informazioni e guide per autori

https://openaccess-info.inaf.it: tutte le informazioni sull'accesso aperto in INAF

Come si inserisce un prodotto: le guide a OA@INAF

La Policy INAF sull'accesso aperto

Documenti e modelli scaricabili

Feedback
Built with DSpace-CRIS - Extension maintained and optimized by Logo 4SCIENCE