PIONIER (VLTI)

Precision Integrated-Optics Near-infrared Imaging ExpeRiment

Alternative names| PIONIER
Part of| Very Large Telescope Interferometer
First light| November 2010
Telescope style| astronomical instrument

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The Precision Integrated-Optics Near-infrared Imaging ExpeRiment (PIONIER) is a visiting instrument at the ESO's Paranal Observatory,[1] part of the VLTI astronomical observatory. It combines the light from four telescopes simultaneously and provide 0.002 arc seconds of angular resolution, the equivalent angular resolution of a 100 m telescope.

PIONIER has been built at LAOG and has been installed at VLTI in November 2010. After few nights of commissioning, it is now routinely delivering science data.

## See also[edit]

* Lists of telescopes

## References[edit]

1. ^ "All Four VLT Unit Telescopes Working as One". ESO Picture of the Week. Retrieved 15 November 2011.

## External links[edit]

* ipag.osug.fr/twiki/bin/view/Ipag/Projets/Pionier/WebHome IPAG (Grenoble) - PIONIER project home
* http://www.osug.fr OSUG Grenoble – PIONIER instrument
* www.eso.org/sci/facilities/paranal/instruments/pionier.html ESO PIONIER – instrument description
* www.eso.org/sci/facilities/paranal/telescopes/vlti/index.html ESO VLTI – about the interferometer at the VLT

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