We present an overview of how recent and upcoming GRAVITY+ upgrades at the VLTI interconnect instrument and science, enabling high-angular-resolution studies of active galactic nuclei (AGN). Improvements such as wideangle off-axis fringe tracking, enhanced fringe-tracker performance, and state-of-the-art adaptive optic...
S. Pappert, Yi-Xian Cao, R. Davies et al.· Astronomical Telescopes + In...· 1 citation
Laser guide star (LGS) adaptive optics has become widespread in ground-based astronomy. It is also the most promising approach for countering atmospheric distortions in uplink optical satellite communications and laser-based space debris tracking and maneuvering. The best performance is achieved when the LGS is created...
Konstantin B. Holzner, Christopher Renkl, M. Brekenfeld et al.· Astronomical Telescopes + In...· 2 citations
GRAVITY+ is an upgrade of the VLTI infrastructure, providing unprecedented spatial resolution and sensitivity. One of the project's objectives was to replace the low-order NGS SCAO systems with four high-order AO modules incorporated in the Coudé train of each VLT UT: GRAVITY+ Adaptive Optics (GPAO). This paper present...
S. Oberti, J. Kolb, A. Berdeu et al.· Astronomical Telescopes + In...· 1 citation
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