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First four telescopes large-separation off-axis fringe-tracking interferometry with GRAVITY at the VLTI
- Source :
- Optical and Infrared Interferometry and Imaging VII.
- Publication Year :
- 2020
- Publisher :
- SPIE, 2020.
-
Abstract
- We present the successful demonstration of world's first large-separation ~30" off-axis fringe tracking with four telescopes in October 2019. With this technique we increase the sky-coverage for optical interferometry by orders of magnitude compared to current technology. Following the early work at the Palomar Testbed Interferometer, the first demonstration of off-axis fringe tracking at the Keck Interferometer and with PRIMA at the ESO Very Large Telescope Interferometer, and the breakthrough with the GRAVITY Galactic Center observations, we enhanced the VLTI infrastructure for GRAVITY to take advantage of the PRIMA Star separators and Differential Delay Lines for off-axis fringe tracking. In our presentation we give an introduction to the subject, present the enhancements of the VLTI, and present our results from the first on-sky operation in October 2019, with observations of the Orion Trapezium Cluster, a field brown dwarf, and a high redshift quasar.
- Subjects :
- Physics
Very Large Telescope
Galactic Center
Astrophysics::Instrumentation and Methods for Astrophysics
Astronomy
Quasar
Astrophysics::Cosmology and Extragalactic Astrophysics
Tracking (particle physics)
Redshift
Interferometry
Palomar Testbed Interferometer
Astronomical interferometer
Astrophysics::Solar and Stellar Astrophysics
Astrophysics::Earth and Planetary Astrophysics
Astrophysics::Galaxy Astrophysics
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Optical and Infrared Interferometry and Imaging VII
- Accession number :
- edsair.doi...........e062cecd4a007ad7ec7621ad1f040bcd