Results 181 to 190 of about 3,877 (212)

Ultraviolet and Visible-light Coronagraphic Imager (UVCI)

SPIE Proceedings, 2003
The HERSCHEL (HElium Resonance Scattering in the Corona and HELiosphere) Sun-Earth Sub-Orbital Program is a proposed sounding-rocket payload designed to investigate helium coronal abundance and solar wind acceleration from a range of solar source structures by obtaining simultaneous observations of the electron, proton and helium solar coronae ...
S. Fineschi, E. Antonucci, ROMOLI, MARCO, D. Gardiol, G. Naletto, S. Giordano, M. Malvezzi, V. . Deppo, L. Zangrilli, G. Noci   +9 more
openaire   +3 more sources

Automatic Coronagraph Image Classification with Machine Learning Methods

Chinese Astronomy and Astrophysics, 2020
Abstract The detection of Coronal Mass Ejections (CMEs) is an important prerequisite for establishing a CME event database and realizing the prediction of CME interplanetary propagation. The Lyman-alpha Solar Telescope (LST) aboard the ASO-S (Advanced Space-based Solar Observatory) satellite will be equipped with a white-light coronagraph. The images
SHAN Jia-hui, FENG Li, YUAN Han-qing, ZHANG Yan, ZHONG Xian, GAN Wei-qun, LI Hui, HUANG Yu   +7 more
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JWST: A mid-IR coronagraph for imaging extrasolar planets

International Conference on Space Optics — ICSO 2004, 2018
MIRI, the mid-IR instrument of JWST (JamesWebb Space Telescope), will include a coronagraphic device for which the ultimate goal is the detection and caracterization of extrasolar planets around nearby stars. In this paper, we describe the optical concept of MIRI and the instrumental choices that were made in phase A and B regarding the coronagraphic ...
Boccaletti, Anthony, Riaud, Pierre, Baudoz, Pierre, Baudrand, Jacques, Reess, Jean-Michel, Rouan, Daniel   +5 more
openaire   +2 more sources

Coronagraphic imaging on the VLTI with VIDA

EAS Publications Series, 2004
In a few years, the VLTI will be able to combine light from 4 to 8 telescopes equipped with adaptive optics. In order to exploit the full VLTI infrastructure, a second generation instrument, based on the densified pupil concept (VIDA), has been proposed for very high resolution direct imaging and coronagraphy.
openaire   +1 more source

The solar high-resolution imager - coronagraph LYOT mission

SPIE Proceedings, 2003
The LYOT (LYman Orbiting Telescope) solar mission is proposed to be implemented on a micro-satellite of CNES (France) under phase A study. It includes two main instruments, which image the solar disk and the low corona up to 2.5 Ro in the H I Lyman-α line at 121.6 nm. The spatial resolution is about 1” for the disk and 2.5” for corona.
Jean-Claude Vial, Xueyan Song, Philippe Lemaire, Alan H. Gabriel, Jean-Pierre Delaboudiniere, Karine Bocchialini, Serge L. Koutchmy, Philippe L. Lamy, Raymond Mercier, Marie Francoise Ravet, Frederic Auchere   +10 more
openaire   +1 more source

Post-coronagraph wavefront sensor for Gemini Planet Imager

SPIE Proceedings, 2008
The calibration wavefront system for the Gemini Planet Imager (GPI) will measure the complex wavefront at the apodized pupil and provide slow phase errors to the AO system to mitigate against image plane speckles that would cause a loss in contrast. This talk describes both the low-order and high-order sensors in the calibration wavefront sensor and ...
J. Kent Wallace, John Angione, Randall Bartos, Paul Best, Rick Burruss, Felipe Fregoso, B. Martin Levine, Bijan Nemati, Michael Shao, Chris Shelton   +9 more
openaire   +1 more source

Imaging exoplanets with the coronagraph of JWST/MIRI

Advances in Space Research, 2005
Abstract The James Webb Space Telescope (former NGST) main objectives are the understanding of the Universe and the birth and formation of stars. To achieve this program JWST will include four instruments one of which is a mid IR camera and spectrometer named MIRI dedicated to the study of faint red-shifted galaxies.
Boccaletti, Anthony, Baudoz, Pierre, Baudrand, Jacques, Reess, Jean-Michel, Rouan, Daniel   +4 more
openaire   +3 more sources

Subaru Near-Infrared Coronagraphic Images of LkHα 234

AIP Conference Proceedings, 2009
We present high‐resolution (0″.2) near‐infrared images of the Herbig Ae/Be star LkHα 234 taken with the stellar coronagraphic camera CIAO (Coronagraphic Imager with Adaptive Optics) on the Subaru Telescope. We have observed LkHα 234, located in the NGC 7129 star formation region at 1.25 kpc, using the adaptive optics and the coronagraph. Near‐infrared (
Eri Kato, Misato Fukagawa, Hiroshi Shibai, Yusuke Ito, Takafumi Ootsubo, Tomonori Usuda, Motohide Tamura, Miki Ishii   +7 more
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Scalar Vortex Coronagraphs for Imaging Habitable Exoplanets

Of the over 5,600 exoplanets detected to date, less than 2% have ever been directly imaged. Direct imaging is crucial for the study of habitable exoplanets around Sun-like stars because it offers the potential to characterize their atmospheres and detect biosignatures. However, the extreme contrast between star and planet light poses immense challenges
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Extrasolar Planetary Imaging Coronagraph (EPIC)

SPIE Proceedings, 2006
Mark Clampin, Gary Melnick, Richard Lyon, Scott Kenyon, Dimitar Sasselov, Volker Tolls, Holland Ford, David Golimowski, Larry Petro, George Hartig, William Sparks, Garth Illingworth, Doug Lin, Sara Seager, Alycia Weinberger, Martin Harwit, Mark Marley, Jean Schneider, Michael Shao, Marty Levine, Jian Ge, Robert Woodruff   +21 more
openaire   +1 more source