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216 papers · 1 filter
DanceCam: atmospheric turbulence mitigation in wide-field astronomical images with short-exposure video streams
Spencer Bialek, Emmanuel Bertin, Sébastien Fabbro +4
We introduce a novel technique to mitigate the adverse effects of atmospheric turbulence on astronomical imaging. Utilizing a video-to-image neural network trained on simulated dat…
On-ground calibration of the X-ray, gamma-ray, and relativistic electron detector onboard TARANIS
Yuuki Wada, Philippe Laurent, Damien Pailot +9
We developed the X-ray, Gamma-ray and Relativistic Electron detector (XGRE) onboard the TARANIS satellite, to investigate high-energy phenomena associated with lightning discharges…
Life Cycle Assessment of the Athena X-ray Integral Field Unit
Didier Barret, Vincent Albouys, Jürgen Knödlseder +15
The X-ray Integral Field Unit (X-IFU) is the high-resolution X-ray spectrometer to fly on board the Athena Space Observatory of the European Space Agency (ESA). It is being develop…
Representation of a Noisy Transmission Line
Martin Bucher, Daniel Molnar
We analyse a lossy transmission line and the Johnson-Nyquist noise generated therein. A representation as a noisy two-port with a voltage and a current noise sources on one end of…
Representations of Noisy -Ports
Martin Bucher, Daniel Molnar
Much has been written about the representation of noisy linear 2-ports. Here we present a theory of noisy -ports. We show how in the general case there are equiva…
Single-mode waveguides for GRAVITY II. Single-mode fibers and Fiber Control Unit
G. Perrin, L. Jocou, K. Perraut +22
The 2nd generation VLTI instrument GRAVITY is a two-field infrared interferometer operating in the K band between 1.97 and 2.43 m with either the four 8 m or the four 1.8 m tele…