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The VLTI continues to develop along the lines of its 2017 roadmap. A new 200m AT baseline is now available, pushing the VLTI angular resolution and imaging capability. The second generation instruments GRAVITY and MATISSE continue delivering outstanding results. The continued developments of the VLTI, especially with the UTs, are now happening under the umbrella of the GRAVITY+ project. Fringe tracking has significantly improved following an upgrade of the GRAVITY fringe tracker and the completion of GRAVITY for MATISSE. The wide off-axis capability of the interferometer, in science operation with GRAVITY wide, is now delivering key science results. The imminent installation of the new UT adaptive optics GPAO will soon improve the high-contrast and short wavelength performance on bright objects. The addition of laser guide stars in 2025 will do the same for much fainter targets.
J. Woillez (Wed,) studied this question.
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