I3T: Intensity Interferometry Imaging Telescope

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  • Pierre Marie Gori
  • Farrokh Vakili
  • Jean Pierre Rivet
  • William Guerin
  • Mathilde Hugbart
  • Andrea Chiavassa
  • Vakili, Adrien
  • Robin Kaiser
  • Guillaume Labeyrie

We propose a new approach, based on the Hanbury Brown and Twiss intensity interferometry, to transform a Cherenkov telescope to its equivalent optical telescope. We show that, based on the use of photonics components borrowed from quantum-optical applications, we can recover spatial details of the observed source down to the diffraction limit of the Cherenkov telescope, set by its diameter at the mean wavelength of observation. For this, we propose to apply aperture synthesis techniques from pairwise and triple correlation of sub-pupil intensities, in order to reconstruct the image of a celestial source from its Fourier moduli and phase information, despite atmospheric turbulence. We examine the sensitivity of the method, i.e. limiting magnitude, and its implementation on existing or future high energy arrays of Cherenkov telescopes. We show that despite its poor optical quality compared to extremely large optical telescopes under construction, a Cherenkov telescope can provide diffraction limited imaging of celestial sources, in particular at the visible, down to violet wavelengths.

Original languageEnglish
JournalMonthly Notices of the Royal Astronomical Society
Issue number2
Pages (from-to)2328-2335
Publication statusPublished - 2021

Bibliographical note

Funding Information:
This work has been supported by the CNRS Institute des Sciences de l?Univers, INSU?s French CTA-section conducted by J?urgen Kn?odlseder from IRAP/Toulouse. We acknowledge funding from the French National Research Agency (Project I2C, ANR20-CE31-0003) and R?egion PACA (project I2C). PMG is indebted to E Taffin de Givenchy and F Th?evenin for their support of the PhD program at UCA, Nice, France.

Publisher Copyright:
© 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.

    Research areas

  • instrumentation: high angular resolution, instrumentation: interferometers, stars: imaging, telescopes

ID: 306682133