Results 71 to 80 of about 1,832,653 (172)

Conceptual design of the Coronagraphic High Angular Resolution Imaging Spectrograph (CHARIS) for the Subaru telescope

, 2012
Recent developments in high-contrast imaging techniques now make possible both imaging and spectroscopy of planets around nearby stars. We present the conceptual design of the Coronagraphic High Angular Resolution Imaging Spectrograph (CHARIS), a lenslet-
Kasdin, N Jeremy, Gunn, James E, Qian Gong, Janson, Markus, Takato, Naruhisa, Hayashi, Masahiko, Carlotti, Alexis, Tyler Groff, Michael A. Carr, Martinache, Frantz, N. Jeremy Kasdin, Naruhisa Takato, Peters, Mary Anne, McElwain, Michael W, Michael W. McElwain, James E. Gunn, Gillian Knapp, Knapp, Gillian R, Masahiko Hayashi, Frantz Martinache, Olivier Guyon, Lupton, Robert, Robert Lupton, Carr, Michael A, Groff, Tyler, Galvin, Michael, Brandt, Timothy, Mary A. Peters, Timothy Brandt, Gong, Qian, Michael Galvin, Markus Janson, Alexis Carlotti, Guyon, Olivier   +33 more
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Calibrating Coronagraphic Spectroscopy on the HST Space Telescope Imaging Spectrograph

Coronagraphic imaging allows us to study faint features around bright objects, and can be combined with long-slit spectroscopy by adding an occulting bar in the slit.
Zhang, Jingyi
core   +1 more source

Worlds Next Door: A Candidate Giant Planet Imaged in the Habitable Zone of α Centauri A. II. Binary Star Modeling, Planet and Exozodi Search, and Sensitivity Analysis

The Astrophysical Journal Letters
The James Webb Space Telescope (JWST) observed our closest solar twin, α Centauri A ( α Cen A), with the Mid-Infrared Instrument in the F1550C (15.5 μ m) coronagraphic imaging mode at three distinct epochs between 2024 August and 2025 April.
Aniket Sanghi, Charles Beichman, Dimitri Mawet, William O. Balmer, Nicolas Godoy, Laurent Pueyo, Anthony Boccaletti, Max Sommer, Alexis Bidot, Elodie Choquet, Pierre Kervella, Pierre-Olivier Lagage, Jarron Leisenring, Jorge Llop-Sayson, Michael Ressler, Kevin Wagner, Mark Wyatt   +16 more
doaj   +1 more source

Sky Brightness Evaluation at Concordia Station, Dome C, Antarctica, for Ground-Based Observations of the Solar Corona. [PDF]

Sol Phys, 2022
Liberatore A, Capobianco G, Fineschi S, Massone G, Zangrilli L, Susino R, Nicolini G.   +6 more
europepmc   +1 more source

Faster imaging simulation through complex systems: a coronagraphic example

, 2020
End-to-end simulation of the influence of the optical train on the observed scene is important across optics and is particularly important for predicting the science yield of astronomical telescopes.
Douglas, Ewan S., Milani, Kian
core   +1 more source

High contrast imaging wavefront sensor referencing from coronagraphic images

, 2021
SPIE PROCEEDING. arXiv admin note: substantial text overlap with arXiv:2110.14997A key challenge of high contrast imaging (HCI) is to differentiate a speckle from an exoplanet signal. The sources of speckles are a combination of atmospheric residuals and
Vievard, Sebastien, Lozi, Julien, Ferreira, Florian, Deo, Vincent, Sevin, Arnaud, Vidal, Fabrice, Norris, Barnaby, Ahn, Kyohoon, Boccaletti, Anthony, Skaf, Nour, Currie, Thayne, Gendron, Eric, Guyon, Olivier, Bertrou-Cantou, Arielle   +13 more
core   +1 more source

Resolution and calibration effects in high contrast polarimetric imaging of circumstellar scattering regions

Astronomy & Astrophysics
Context. Many circumstellar dust scattering regions have been detected and investigated with polarimetric imaging. However, the quantitative determination of the intrinsic polarization and of dust properties is difficult because of complex observational ...
Schmid H. M., Ma J.
doaj   +1 more source

NICMOS Two Gyro Mode Coronagraphic Performance

, 2005
In preparation for the Hubble Space Telescope (HST) entry into Two Gyro Mode (TGM) operations, the NICMOS coronagraphic performance was assessed during the February 21, 2005 TGM on orbit test (ID: 10448) in two filter bands (F110W and F160W).
G. Schneider, A. B. Schultz, I. Dashevsky, S. Malhotra   +3 more
core  

SHARK-NIR: The coronagraphic camera for LBT in the AIV phase at INAF-Padova

, 2018
Exo-Planets search and characterization has been the science case driving the SHARK-NIR design, which is one of the two coronagraphic instruments proposed for the Large Binocular Telescope. In fact, together with SHARK-VIS (working in the visible domain),
Gaessler, Wolfgang, Giallongo, Emanuele, Ragazzoni, R., Pinna, Enrico, Carolo, Elena, D'Orazi, Valentina, Puglisi, Alfio, Baffa, C., Vérinaud, Christophe, Pedichini, F., Vassallo, Daniele, Magrin, D., Montoya, Manny, Bongiorno, A., Hinz, Philip, Baruffolo, A., Bianco, Andrea, Carbonaro, Luca, Bianco, A., Farisato, Giancarlo, Greggio, D., Pinna, E., Close, Laird, Viotto, V., Baruffolo, Andrea, Carlotti, A., Bongiorno, Angela, Lessio, Luigi, Marafatto, Luca, Close, L., Salasnich, B., Vassallo, D., Gaessler, W., Hinz, P., Bacciotti, Francesca, Esposito, Simone, Fantinel, D., Guyon, O., Chinellato, Simonetta, Mohr, L., Bacciotti, F., Magrin, Demetrio, Ragazzoni, Roberto, Carolo, E., Dima, M., Farinato, Jacopo, Lessio, L., Carlotti, Alexis, Farisato, G., Mesa, Dino, De Pascale, M., Marafatto, L., Bergomi, M., Giallongo, E., Fantinel, Daniela, Mesa, D., Vérinaud, C., Salasnich, Bernardo, Puglisi, A., Stangalini, M., Bergomi, Maria, Pedichini, Fernando, Zanutta, Alessio, Zanutta, A., Mohr, Lars, Agapito, G., D'Orazi, V., Greggio, Davide, Stangalini, Marco, Chinellato, S., Esposito, S., Montoya, M., De Pascale, Marco, Dima, Marco, Agapito, Guido, Carbonaro, L., Baffa, Carlo, Farinato, J., Viotto, Valentina, Guyon, Olivier, Hinz, Esposito, Farinato, Beuzit, Stangalini, Ragazzoni, Close, Hill, Macintosh, Guyon, Ghedina, Costa, Riccardi   +92 more
core   +1 more source

SuNeRF-CME: Physics-informed Neural Radiance Fields for Tomographic Reconstruction of Coronal Mass Ejections

The Astrophysical Journal
Coronagraphic observations enable direct monitoring of coronal mass ejections (CMEs) through scattered light from free electrons, but determining the 3D plasma distribution from 2D imaging data is challenging due to the optically thin plasma and the ...
Robert Jarolim, Martin Sanner, Chia-Man Hung, Emma Stevenson, Hala Lamdouar, Josh Veitch-Michaelis, Ioanna Bouri, Anna Malanushenko, Elena Provornikova, Vít Růžička, Carlos Urbina-Ortega   +10 more
doaj   +1 more source