Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003spie.4838.1115d&link_type=abstract
Interferometry for Optical Astronomy II. Edited by Wesley A. Traub . Proceedings of the SPIE, Volume 4838, pp. 1115-1126 (2003
Astronomy and Astrophysics
Astronomy
1
Scientific paper
In March 2001, the commissioning instrument of the VLTI, VINCI, succeeded in obtaining its first fringes by linking two 40 cm aperture siderostats on a 16 m baseline. During the first year of operation, thousands of interferometric observations on different baselines were carried out, with the technical goal of characterizing this complex system. We report in this paper these first measurements and estimate the main parameters of the atmospheric and internal turbulence along the complete light path. We first illustrate the degradation of the visibility accuracy caused by the differential piston and evaluate the contribution of the internal optical path fluctuations with respect to the atmospheric ones. The stability of the VLTI complex is demonstrated, which enabled us to record easily fringes with Unit Telescopes (UTs) on baselines as long as 102.5 m (November 2001). In the last part, infrared measurements of the atmospheric differential piston are reported. They were obtained with the siderostats on two different baselines ranging from 16m to 66m. Estimations of the coherence time at Cerro Paranal are derived from these commissioning data and compared to the values predicted by the Astronomic Site Monitor (ASM). Finally, constraints on the outer scale length are discussed.
Coudé du Foresto Vincent
di Folco Emmanuel
Kervella Pierre
Koehler Bertrand
Sarazin Marc S.
No associations
LandOfFree
Atmospheric and internal turbulence measured on the Very Large Telescope Interferometer with VINCI does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Atmospheric and internal turbulence measured on the Very Large Telescope Interferometer with VINCI, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Atmospheric and internal turbulence measured on the Very Large Telescope Interferometer with VINCI will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-915378