activity
19982022
most citedA geometric distance measurement to the Galactic Center black hole with 0.3% uncertainty

826 citations · 3.4k across the 42 of their papers we have counts for

collaborators

42 papers

astro-ph.IM2022

GRAVITY+ Wide: Towards hundreds of z 2 AGN

A. Drescher, M. Fabricius, T. Shimizu +34

As part of the GRAVITY project, the near-infrared beam combiner GRAVITY and the VLTI are currently undergoing a series of significant upgrades to further improve the performa…

gr-qc2022★ 60 cited

Observational signatures of hot spots orbiting horizonless objects

João Luís Rosa, Paulo Garcia, Frédéric H. Vincent +1

Pushed by a number of advances, electromagnetic observatories have now reached the horizon scale of supermassive black holes. The existence and properties of horizons in our univer…

astro-ph.IM2021★ 34 cited

Faint objects in motion: the new frontier of high precision astrometry

Fabien Malbet, Céline Boehm, Alberto Krone-Martins +83

Sky survey telescopes and powerful targeted telescopes play complementary roles in astronomy. In order to investigate the nature and characteristics of the motions of very faint ob…

astro-ph.GA2021★ 83 cited

The central parsec of NGC 3783: a rotating broad emission line region, asymmetric hot dust structure, and compact coronal line region

GRAVITY Collaboration, A. Amorim, M. Bauböck +47

Using VLTI/GRAVITY and SINFONI data, we investigate the sub-pc gas and dust structure around the nearby type 1 AGN hosted by NGC 3783. The K-band coverage of GRAVITY uniquely allow…

astro-ph.EP2021★ 9 cited

The ExoGRAVITY project: using single mode interferometry to characterize exoplanets

S. Lacour, J. J. Wang, M. Nowak +89

Combining adaptive optics and interferometric observations results in a considerable contrast gain compared to single-telescope, extreme AO systems. Taking advantage of this, the E…

astro-ph.IM2020★ 3 cited

GRAVITY acquisition camera: characterization results

Narsireddy Anugu, Paulo Garcia, Antonio Amorim +10

GRAVITY acquisition camera implements four optical functions to track multiple beams of Very Large Telescope Interferometer (VLTI): a) pupil tracker: a lenslet images…