Query : 2000A&AS..141..301C

2000A&AS..141..301C - Astron. Astrophys., Suppl. Ser., 141, 301-311 (2000/January-2)

Interferometric imaging tests for the Large Binocular Telescope.


Abstract (from CDS):

We present an experiment of interferometric imaging for the Large Binocular Telescope (LBT), conducted at the 1.5m TIRGO infrared telescope. The raw data were produced by simulating the LBT pupil with a mask on the secondary mirror. Two different conditions of D/r0, where D is the single aperture diameter and r0 the Fried parameter, were simulated by the choice of D ; field rotation was simulated by rotating the mask. The data set collected consists of several sequences of short exposure interferograms of one point-like and one binary star in the J-band, for two different D/r0 conditions. We show preliminary results, in particular concerning the fringe contrast loss with integration time. The ability of a Lucy-Richardson-based deconvolution algorithm to reconstruct an object from a set of LBT-like interferometric real data was demonstrated on the binary star γ Leo. The retrieved binary parameter values are compared to catalog values, and a good astrometric agreement is found. Photometric and resolution limitations are also discussed. In a first part, the reconstruction method and preliminary numerical simulations of LBT image restoration using this method are presented.

Abstract Copyright:

Journal keyword(s): instrumentation: interferometers - methods: data analysis - techniques: image processing - techniques: interferometric - telescopes - stars: imaging

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 V* AD Leo Er* 10 19 36.2808181226 +19 52 12.010446571   10.82 9.52 9.19   dM3 1279 1
2 * gam01 Leo PM* 10 19 58.354462 +19 50 29.35920 4.13 3.13 1.98 1.13 0.51 K1-IIIFe-1 281 1
3 * gam02 Leo PM* 10 19 58.619717 +19 50 26.70347   3.4   2.2   G7IIIbFe-1.5 146 0

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