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pro vyhledávání: '"Bharmal, Nazim"'
The direct detection and imaging of exoplanets requires the use of high-contrast adaptive optics (AO). In these systems quasi-static aberrations need to be highly corrected and calibrated. In order to achieve this, the pupil-modulated point-diffracti
Externí odkaz:
http://arxiv.org/abs/2204.04940
Autor:
Hottinger, Philipp, Harris, Robert J., Crass, Jonathan, Dietrich, Philipp-Immanuel, Blaicher, Matthias, Bechter, Andrew, Sands, Brian, Morris, Tim J., Basden, Alastair G., Bharmal, Nazim Ali, Heidt, Jochen, Anagnos, Theodoros, Neureuther, Philip L., Glück, Martin, Power, Jennifer, Pott, Jörg-Uwe, Koos, Christian, Sawodny, Oliver, Quirrenbach, Andreas
We present the first on-sky results of the micro-lens ring tip-tilt (MLR-TT) sensor. This sensor utilizes a 3D printed micro-lens ring feeding six multi-mode fibers to sense misaligned light, allowing centroid reconstruction. A tip-tilt mirror allows
Externí odkaz:
http://arxiv.org/abs/2106.10152
Autor:
Haffert, Sebastiaan Y., Harris, Robert J., Zanutta, Alessio, Pike, Fraser A., Bianco, Andrea, Redaelli, Eduardo, Benoît, Aurélien, MacLachlan, David G., Ross, Calum A., Gris-Sánchez, Itandehui, Trappen, Mareike D., Xu, Yilin, Blaicher, Matthias, Maier, Pascal, Riva, Giulio, Sinquin, Baptiste, Kulcsár, Caroline, Bharmal, Nazim Ali, Gendron, Eric, Staykov, Lazar, Morris, Tim J., Barboza, Santiago, Muench, Norbert, Bardou, Lisa, Prengère, Léonard, Raynaud, Henri-François, Hottinger, Phillip, Anagnos, Theodoros, Osborn, James, Koos, Christian, Thomson, Robert R., Birks, Tim A., Snellen, Ignas A. G., Keller, Christoph U.
Direct imaging instruments have the spatial resolution to resolve exoplanets from their host star. This enables direct characterization of the exoplanets atmosphere, but most direct imaging instruments do not have spectrographs with high enough resol
Externí odkaz:
http://arxiv.org/abs/2009.03529
Autor:
Cantalloube, Faustine, Farley, Ollie, Milli, Julien, Bharmal, Nazim Ali, Brandner, Wolfgang, Correia, Carlos, Dohlen, Kjetil, Henning, Th, Osborn, James, Por, Emiel, Valles, M Suárez, Vigan, Arthur
Publikováno v:
A&A 638, A98 (2020)
Context. The wind driven halo is a feature observed within the images delivered by the latest generation of ground-based instruments equipped with an extreme adaptive optics system and a coronagraphic device, such as SPHERE at the VLT. This signature
Externí odkaz:
http://arxiv.org/abs/2003.05794
Autor:
Hottinger, Philipp, Harris, Robert J., Dietrich, Philipp-Immanuel, Blaicher, Matthias, Bechter, Andrew, Crass, Jonathan, Glück, Martin, Pott, Jörg-Uwe, Bharmal, Nazim A., Basden, Alastair, Morris, Tim J., Koos, Christian, Sawodny, Oliver, Quirrenbach, Andreas
Modern extreme adaptive optics (AO) systems achieving diffraction-limited performance open up new possibilities for instrumentation. Especially important for the fields of spectroscopy and interferometry is that it enables the prospect to couple ligh
Externí odkaz:
http://arxiv.org/abs/1912.09537
Publikováno v:
Monthly Notices of the Royal Astronomical Society, stz1362, 2019
Focus anisoplanatism is a significant measurement error when using one single laser guide star (LGS) in an Adaptive Optics (AO) system, especially for the next generation of extremely large telescopes. An alternative LGS configuration, called Project
Externí odkaz:
http://arxiv.org/abs/1905.09535
Atmospheric profiling is a requirement for controlling wide-field Adaptive Optics (AO) instruments, analyzing the AO performance with respect to the observing conditions and predicting the Point Spread Function (PSF) spatial variations. We present PE
Externí odkaz:
http://arxiv.org/abs/1901.10701
Akademický článek
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Autor:
Basden, Alastair, Bharmal, Nazim, Jenkins, David, Morris, Timothy, Osborn, James, Jia, Peng, Staykov, Lazar
The Durham Adaptive Optics Simulation Platform (DASP) is a Monte-Carlo modelling tool used for the simulation of astronomical and solar adaptive optics systems. In recent years, this tool has been used to predict the expected performance of the forth
Externí odkaz:
http://arxiv.org/abs/1802.08503
Autor:
Egner, Sébastien E., Roberts, Scott, Janssen, Annemieke, El Hadi, Kacem, Bharmal, Nazim Ali, Wildi, François, Pannetier, Cyril, Dalton, Gavin, Ducret, Franck, Garcia Vargas, Marisa, Lynn, Jeff, Pello, Roser, Prieto, Eric, Puech, Mathieu, Rodrigues, Myriam, Sanchez-Janssen, Ruben
Publikováno v:
Proceedings of SPIE; September 2024, Vol. 13099 Issue: 1 p130990P-130990P-9, 1178920p