Results 41 to 50 of about 57,270 (311)

Event types in H.E.S.S.: A combined analysis for different telescope types and energy ranges

Astronomy & Astrophysics
Imaging atmospheric Cherenkov telescopes (IACTs) are the main technique for detecting gamma rays with energies between tens of GeV and hundreds of TeV.
Guedes Lang Rodrigo, Unbehaun Tim, Mohrmann Lars, Steinmassl Simon, Hinton Jim, Funk Stefan   +5 more
doaj   +1 more source

Laser guide stars and turbulence profiling for extremely large telescopes [PDF]

, 2006
The next generation of ground based telescopes, the so-called extremely large telescopes, will offer a significant leap in sensitivity and resolution compared to current telescopes. They also present a range of technical challenges.
Butterley, Timothy
core  

Gravitational deformation of ring-focus antennas for VGOS: first investigations at the Onsala twin telescopes project [PDF]

, 2019
The receiving properties of radio telescopes used in geodetic and astrometric very long baseline interferometry (VLBI) depend on the surface quality and stability of the main reflector.
Lösler, Michael,, Eschelbach, Cornelia,, Greiwe, Ansgar,, Haas, R\ufcdiger, L\uf6sler, Michael, Haas, Rüdiger,, Eschelbach, Cornelia, Greiwe, Ansgar   +7 more
core   +1 more source

Pointlike Material Accumulation and Displacement in Azopolymer Thin Films Driven by Spatial Light Modulation

Advanced Optical Materials, EarlyView.
A maskless, SLM‐driven approach enables the deterministic inscription of arbitrary topographical features in azopolymer films by mapping complex vectorial light fields onto local viscoplastic stress. This platform allows for the rapid generation and dynamic erasure of high‐aspect‐ratio micro‐spikes, offering a versatile tool for reconfigurable flat ...
Jonas Strobelt, Nikolai Liubimtsev, Marina Saphiannikova, Svetlana Santer   +3 more
wiley   +1 more source

CLEAN and multiscale CLEAN for STIX in Solar Orbiter

Astronomy & Astrophysics
CLEAN is a well-established deconvolution approach to Fourier imaging at radio wavelengths and hard X-ray energies. One of the main limitations of CLEAN for hard X-ray imaging is that it requires a final convolution step by means of a convolution kernel ...
Catalano Miriana, Volpara Anna, Massa Paolo, Piana Michele, Massone Anna Maria   +4 more
doaj   +1 more source

Solar surveillance with CLIMSO: instrumentation, database and on-going developments

Journal of Space Weather and Space Climate, 2020
CLIMSO is a suite of solar telescopes installed at Pic du Midi observatory in the southwest of France. It consists of two refractors that image the full solar disk in Hα and CaII K, and two coronagraphs that capture the prominences and ejections of ...
Pitout Frédéric, Koechlin Laurent, López Ariste Arturo, Dettwiller Luc, Glorian Jean-Michel   +4 more
doaj   +1 more source

New techniques in astronomical spectroscopy for 8-m telescopes [PDF]

, 1998
The purpose of this thesis is to investigate new instrument technology to enhance the capabilities of 8-m telescopes. This thesis first describes the theory, design, construction, and testing of an immersed grating.
Lee, David, Lee, D.
core  

From Rigid to Soft Robotic Approaches for Neuroendoscopy

Advanced Robotics Research, EarlyView.
Robotic assistance has had minimal impact on deep intraventricular surgeries, where small‐scale, precision, and reduced invasiveness can contribute to improved patient outcomes. Emerging technologies in rigid, soft, and hybrid robotics are reviewed to identify the most promising mechanisms for deep brain navigation in addition to an attempt to identify
Kieran Gilday, Irena Zubak, Andreas Raabe, Josie Hughes   +3 more
wiley   +1 more source

Jitter sensing and reconstruction from temporal series of solar images: Applications to TuMag

Astronomy & Astrophysics
Context. Images recorded with the Tunable Magnetograph (TuMag) instrument on board the SUNRISE III balloon observatory are affected by temporal contrast fluctuations. These variations are related to high-frequency vibrations (jitter) of the platform that
Bailén F. J., Orozco Suárez D., Siu-Tapia A. L., Strecker H., Blanco Rodríguez J., Arroyo D., Santamarina Guerrero P., del Toro Iniesta J. C., Bellot Rubio L. R., Morrell C., Gafeira R., Trelles Arjona J. C., Korpi-Lagg A., Gandorfer A., Solanki S. K., Katsukawa Y., Bernasconi P., Berkefeld T., Feller A., Riethmüller T. L., Raouafi N., Vourladis A., Álvarez-Herrero A., Kubo M., Martínez Pillet V., Smitha H. N., Grauf B., Iglesias F. A., Bell A., Kawabata Y., Oba T., Matsumoto T., Ishikawa R. T., Hölken J., Vukadinović D., Castellanos Durán J. S., Harnes E., Balaguer Jiménez M., Sanchis Kilders E., Torralbo I., Kuckein C., Álvarez García D., Aparicio del Moral B., Bailón Martínez E., Campos-Jara A., Cebollero M., Fernández-Medina A. B., García Parejo P., Garranzo-García D., Gasent Blesa J. L., López Jiménez A. C., Morales-Fernández J. M., Moreno Mantas A. J., Moreno Vacas A., Núñez Peral A., Pérez-Grande I., Piqueras Carreño J., Ramos Más J. L., Sánchez Barranquero J., Sánchez Gómez A., Silva-López M., Tobaruela A.   +61 more
doaj   +1 more source

VLBI2010 - The TWIN radio telescope project at Wettzell, Germany [PDF]

, 2010
The Twin Telescope Wettzell (TTW) Project is funded to be exec uted during the period of 2008-2011. The design of the TTW was based on the VLBI2010 vision of the corresponding IVS Working Group.
Hase, H, Kronschnabl, G, Klügel, T, Göldi, W, Neidhardt, A, Pausch, K   +5 more
core