activity
20072018
most citedVery-High-Energy Gamma Rays from a Distant Quasar: How Transparent Is the Universe?

446 citations · 2.2k across the 27 of their papers we have counts for

collaborators

27 papers

astro-ph.CO2018★ 21 cited

Impact of the 3D source geometry on time-delay measurements of lensed type-Ia Supernovae

V. Bonvin, O. Tihhonova, M. Millon +4

It has recently been proposed that gravitationally lensed type-Ia supernovae can provide microlensing-free time-delay measurements provided that the measurement is taken during the…

astro-ph.IM2015★ 3 cited

GRAVITY: the VLTI 4-beam combiner for narrow-angle astrometry and interferometric imaging

N. Blind, F. Eisenhauer, S. Gillessen +23

GRAVITY is the second generation Very Large Telescope Interferometer instrument for precision narrow-angle astrometry and interferometric imaging in the Near Infra-Red (NIR). It sh…

astro-ph.IM2015★ 5 cited

The GRAVITY metrology system: narrow-angle astrometry via phase-shifting interferometry

M. Lippa, N. Blind, S. Gillessen +26

The VLTI instrument GRAVITY will provide very powerful astrometry by combining the light from four telescopes for two objects simultaneously. It will measure the angular separation…

astro-ph.IM2014★ 21 cited

The fiber coupler and beam stabilization system of the GRAVITY interferometer

O. Pfuhl, M. Haug, F. Eisenhauer +20

We present the installed and fully operational beam stabilization and fiber injection subsystem feeding the 2nd generation VLTI instrument GRAVITY. The interferometer GRAVITY requi…

astro-ph.IM2014★ 1 cited

The GRAVITY metrology system: modeling a metrology in optical fibers

N. Blind, H. Huber, F. Eisenhauer +20

GRAVITY is the second generation VLT Interferometer (VLTI) instrument for high-precision narrow-angle astrometry and phase-referenced interferometric imaging. The laser metrology s…

astro-ph.IM2014★ 13 cited

GRAVITY: the Calibration Unit

N. Blind, F. Eisenhauer, M. Haug +19

We present in this paper the design and characterisation of a new sub-system of the VLTI 2nd generation instrument GRAVITY: the Calibration Unit. The Calibration Unit provides all…