Dynamic distortion calibration using a diffracting pupil: High precision astrometry laboratory demonstration for exoplanet detection

Eduardo A. Bendek, S. Mark Ammons, Harish Shankar, Olivier Guyon

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Detection of earth-size exoplanets using the astrometric signal of the host star requires sub microarcsecond measurement precision. One major challenge in achieving this precision using a medium-size (<2-m) space telescope is the calibration of dynamic distortions. The researchers propose a diffractive pupil technique that uses an array of approximately 50um dots on the primary mirror that generate polychromatic diffraction spikes in the focal plane. The diffraction spikes encode optical distortions in the optical system and may be used to calibrate astrometric measurements. This concept can be used simultaneously with coronagraphy for exhaustive characterization of exoplanets (mass, spectra, orbit). At the University of Arizona, a high precision astrometry laboratory is being developed to demonstrate the capabilities of this diffractive pupil concept. The researchers aim to achieve 10 μas single-axis precision in the laboratory, simulating 0.14 μas precision on a 1.4 m space telescope. This paper describes this laboratory and presents the data and results obtained so far.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume8151
DOIs
StatePublished - 2011
EventTechniques and Instrumentation for Detection of Exoplanets V - San Diego, CA, United States
Duration: Aug 23 2011Aug 24 2011

Other

OtherTechniques and Instrumentation for Detection of Exoplanets V
CountryUnited States
CitySan Diego, CA
Period8/23/118/24/11

Fingerprint

Astrometry
planet detection
Exoplanets
astrometry
pupils
Space telescopes
Calibration
Demonstrations
Diffraction
Space Telescope
extrasolar planets
Spike
spikes
Optical systems
Stars
Coronagraphy
telescopes
Mirrors
Orbits
Earth (planet)

Keywords

  • Diffractive pupil
  • Distortion
  • exoplanet detection
  • high precision astrometry

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Bendek, E. A., Ammons, S. M., Shankar, H., & Guyon, O. (2011). Dynamic distortion calibration using a diffracting pupil: High precision astrometry laboratory demonstration for exoplanet detection. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 8151). [81510U] https://doi.org/10.1117/12.893130

Dynamic distortion calibration using a diffracting pupil : High precision astrometry laboratory demonstration for exoplanet detection. / Bendek, Eduardo A.; Ammons, S. Mark; Shankar, Harish; Guyon, Olivier.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8151 2011. 81510U.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Bendek, EA, Ammons, SM, Shankar, H & Guyon, O 2011, Dynamic distortion calibration using a diffracting pupil: High precision astrometry laboratory demonstration for exoplanet detection. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 8151, 81510U, Techniques and Instrumentation for Detection of Exoplanets V, San Diego, CA, United States, 8/23/11. https://doi.org/10.1117/12.893130
Bendek EA, Ammons SM, Shankar H, Guyon O. Dynamic distortion calibration using a diffracting pupil: High precision astrometry laboratory demonstration for exoplanet detection. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8151. 2011. 81510U https://doi.org/10.1117/12.893130
Bendek, Eduardo A. ; Ammons, S. Mark ; Shankar, Harish ; Guyon, Olivier. / Dynamic distortion calibration using a diffracting pupil : High precision astrometry laboratory demonstration for exoplanet detection. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8151 2011.
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