Results 71 to 80 of about 414,153 (280)

In-orbit focal adjustment of the AKARI telescope with IRC images

, 2007
AKARI currently in space carries onboard a cryogenically-cooled lightweight telescope with silicon carbide mirrors. The wavefront error of the AKARI telescope obtained in laboratory measurements at 9 K showed that expected in-orbit imaging performance ...
Ita, Y., Kaneda, H., Kim, W., Onaka, T., Sakon, I., Takagi, T., Wada, T.   +6 more
core   +1 more source

The THESEUS Space Mission and the Infrared Telescope Calibration Unit

Astronomische Nachrichten, EarlyView.
ABSTRACT The Transient High‐Energy Sky and Early Universe Surveyor (THESEUS) is an ESA M7 mission concept currently in Phase A, designed to exploit gamma‐ray bursts to probe the early Universe while advancing multi‐messenger and time‐domain astrophysics. To achieve its ambitious goals, THESEUS will combine wide‐band x‐ray and gamma‐ray monitors with an
András Péter Joó, Rebeka Gyöngyi Kiss, Lorenzo Amati, Bendegúz Koncz, Örs Detre, Gyula Zilizi, Zsolt Bagoly, István I. Rácz, Sándor Pintér, L. Viktor Tóth   +9 more
wiley   +1 more source

Positioning system of the ANTARES Neutrino Telescope

, 2009
Completed in May 2008, the ANTARES neutrino telescope is located 40 km off the coast of Toulon, at a depth of about 2500 m. The telescope consists of 12 detect or lines housing a total of 884 optical modules.
Brown, Anthony M.
core   +2 more sources

Feasibility Study for Application of Digitized Henize Mt. Wilson Michigan Southern Sky Hα$$ \boldsymbol{\alpha} $$ Survey Low‐Dispersive Spectral Plates for Searches for Anomalous and Highly Redshifted Objects

Astronomische Nachrichten, EarlyView.
ABSTRACT The goal of this study is to confirm the feasibility of the use of digitized low dispersive MtWilson Michigan Southern Sky Hα$$ \alpha $$ survey astronomical photographic plates for modern astrophysical research. The detection of highly redshifted objects, such as early galaxies and quasars, is fundamental to understanding the universe's ...
Tauseef Ahmad Zafar, René Hudec, Marta Mara Merono Vidagany, Fehmi Mejri   +3 more
wiley   +1 more source

Statistics of the Optical Turbulence from the Micrometeorological Measurements at the Baykal Astrophysical Observatory Site

Atmosphere, 2019
The paper focuses on the investigations of the optical turbulence structure. The distributions of the repeatability of the structure characteristic of the air refractive index are obtained. A scenario of decreasing the intensity of the optical turbulence
Artem Shikhovtsev, Pavel Kovadlo, Vladimir Lukin, Victor Nosov, Alexander Kiselev, Dmitry Kolobov, Evgeny Kopylov, Maxim Shikhovtsev, Fedor Avdeev   +8 more
doaj   +1 more source

A Study of the LXeGRIT Detection Efficiency for MeV Gamma-Rays during the 2000 Balloon Flight Campaign

, 2007
LXeGRIT - Liquid Xenon Gamma-Ray Imaging Telescope - is the first prototype of a Compton telescope for \MeV \g-ray astrophysics based on a LXe time projection chamber.
A. Curioni, Aprile, Aprile, Aprile, Aprile, Curioni, Doke, E. Aprile, K.L. Giboni, Knoll, M. Kobayashi, Oberlack, Schönfelder, T. Doke, Takahashi, U.G. Oberlack   +15 more
core   +1 more source

Hidden No More: Spotlight on Tidal Disruption Events in Active Galactic Nuclei

Astronomische Nachrichten, EarlyView.
ABSTRACT Tidal disruption events (TDEs) are typically discovered in previously quiescent galaxies. However, earlier studies have revealed a handful of TDEs occurring in pre‐existing active galactic nuclei (AGN). We discuss AT2019aalc, a promising TDE candidate in an AGN, and compare it to similar sources.
Patrik Milán Veres
wiley   +1 more source

Active Optics in Astronomy: Freeform Mirror for the MESSIER Telescope Proposal

Mathematical and Computational Applications, 2018
Active optics techniques in astronomy provide high imaging quality. This paper is dedicated to highly deformable active optics that can generate non-axisymmetric aspheric surfaces—or freeform surfaces—by use of a minimum number of actuators ...
Gerard Rene Lemaitre, Pascal Vola, Eduard Muslimov   +2 more
doaj   +1 more source

The Cherenkov Telescope Array Large Size Telescope

, 2013
The two arrays of the Very High Energy gamma-ray observatory Cherenkov Telescope Array (CTA) will include four Large Size Telescopes (LSTs) each with a 23 m diameter dish and 28 m focal distance.
Ambrosi, G., Awane, Y., Baba, H., Bamba, A., Barceló, M., Barrio, J. A., Bigas, O. Blanch, Boix, J., Brunetti, L., Carmona, E., Chabanne, E., Chikawa, M., Colin, P., Conteras, J. L., Cortina, J., Dazzi, F., de Almeida, U. Barres, Deangelis, A., Deleglise, G., Delgado, C., Dubois, F., Díaz, C., Fiasson, A., Fink, D., Flour, T. Le, Fouque, N., Freixas, L., Fruck, C., Gadola, A., García, R., Gascon, D., Geffroy, N., Giglietto, N., Giordano, F., Grañena, F., Gunji, S., Hagiwara, R., Hamer, N., Hanabata, Y., Hassan, T., Hatanaka, K., Haubold, T., Hayashida, M., Hermel, R., Herranz, D., Hirotani, K., Inoue, S., Inoue, Y., Ioka, K., Jablonski, C., Kagaya, M., Katagiri, H., Kishimoto, T., Kodani, K., Kohri, K., Konno, Y., Koyama, S., Kubo, H., Kushida, J., Lamanna, G., Lorenz, E., López, R., López-Moya, M., Majumdar, P., Manalaysay, A., Mariotti, M., Martínez, G., Martínez, M., Mazin, D., Miranda, J. M., Mirzoyan, R., Monteiro, I., Moralejo, A., Murase, K., Nagataki, S., Nakajima, D., Nakamori, T., Nishijima, K., Noda, K., Nozato, A., Ohira, Y., Ohishi, M., Ohoka, H., Okumura, A., Orito, R., Panazol, J. L., Paneque, D., Paoletti, R., Paredes, J. M., Pauletta, G., Podkladkin, S., Prast, J., Rando, R., Reimann, O., Ribó, M., Rosier-Lees, S., Saito, K., Saito, T., Saito, Y., Sakaki, N., Sakonaka, R., Sanuy, A., Sasaki, H., Sawada, M., Scalzotto, V., Schultz, S., Schweizer, T., Shibata, T., Shu, S., Sieiro, J., Stamatescu, V., Steiner, S., Straumann, U., Sugawara, R., Tajima, H., Takami, H., Tanaka, M., Tanaka, S., Tejedor, L. A., Terada, Y., Teshima, M., Totani, T., Ueno, H., Umehara, K., Vollhardt, A., Wagner, R., Wetteskind, H., Yamamoto, T., Yamazaki, R., Yoshida, A., Yoshida, T., Yoshikoshi, T.   +131 more
core   +1 more source

Telescope Bibliographies: an Essential Component of Archival Data Management and Operations

, 2012
Assessing the impact of astronomical facilities rests upon an evaluation of the scientific discoveries which their data have enabled. Telescope bibliographies, which link data products with the literature, provide a way to use bibliometrics as an impact ...
Accomazzi, Alberto, Erdmann, Christopher, Henneken, Edwin, Rots, Arnold   +3 more
core   +1 more source