Results 1 to 10 of about 681,192 (361)

Ritchey-Chretien Telescope [PDF]

, 1973
A Ritchey-Chretien telescope is described which was designed to respond to images located off the optical axis by using two transparent flat plates positioned in the ray path of the image.
Amon, M., Rosin, S.
core   +1 more source

A 3% SOLUTION: DETERMINATION OF THE HUBBLE CONSTANT WITH THE HUBBLE SPACE TELESCOPE AND WIDE FIELD CAMERA 3 [PDF]

, 2011
We use the Wide Field Camera 3 (WFC3) on the Hubble Space Telescope (HST) to determine the Hubble constant from optical and infrared observations of over 600 Cepheid variables in the host galaxies of eight recent Type Ia supernovae (SNe Ia), providing ...
A. Riess, L. Macri, S. Casertano, H. Lampeitl, H. Ferguson, A. Filippenko, S. Jha, Weidong Li, R. Chornock   +8 more
semanticscholar   +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

MeerKAT time and frequency reference optical network: Preliminary design analysis

South African Journal of Science, 2017
The MeerKAT telescope is a precursor to the Square Kilometre Array, which will rely on optical fibres to link the telescope receivers to a central processor point. The main aspects to consider for the fibre transport are astronomical data transmission as
Enoch K. Rotich Kipnoo, Romeo R.G. Gamatham, Andrew W.R. Leitch, Timothy B. Gibbon, Sias Malan, Henno Kriel, Francois Kapp   +6 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

Dust in External Galaxies [PDF]

, 2009
Existing (Spitzer Space Telescope) and upcoming (Herschel Space Telescope) facilities are deepening our understanding of the role of dust in tracing the energy budget and chemical evolution of galaxies.
Calzetti, Daniela
core   +2 more sources

The Effect of Telescope Use on High School Student Understanding and Learning Motivation [PDF]

, 2022
Devi Eka Wardani Meganingtyas, Vina Serevina, Angestu Heriyoso, Muhammad Rijaluddin   +3 more
openalex   +1 more source

Implementation of a spherical double-plasma-mirror telescope for a multi-petawatt laser

High Power Laser Science and Engineering
High-power laser beamlines typically operate with fixed focusing conditions, limiting the focal spot size and peak intensity. To mitigate these restrictions, prior studies used curved plasma mirrors to adjust the F-number to a specific value.
Valeriu Scutelnic, Martin Speicher, Alice Fazzini, Petru Ghenuche, Domenico Doria, Alexandru Ailincutei, Bruno Gonzalez-Izquierdo, Theodor Asavei, Septimiu Balascuta, John Jasper Bekx, Petrisor Gabriel Bleotu, Giordano Bodini, Carafino Braganza, Alexandra Brodersen, Alessandro Cavalli, Olivier Chalus, Gabriel Cojocaru, Jadyn D’mello, Ioan Dancus, Christophe Derycke, Floris Deurvorst, Michael Ehrmanntraut, Dan Gengenbach, Dan Ghita, Lorenzo Giuffrida, Marius Gugiu, Marc Guenther, Oscar Juina, Kyle Kenney, Sumit Kumar, Mariana Martinez-Pacheco, Ignacio Minguez Bacho, Saidbek Norbaev, Nathaniel Poetranto, Hartmut Ruhl, Emanuel Schork, Markus Stein, Sven Steinke, Anda-Maria Talposi, Antonia Toma, Marco Tosca, Ashwini Ubarhande, Lidia Vasescu, Erhard Gaul, Daniel Rivas, Marius Schollmeier, Georg Korn   +46 more
doaj   +1 more source

High Performance Lyot and PIAA Coronagraphy for Arbitrarily shaped Telescope Apertures

, 2013
Two high performance coronagraphic approaches compatible with segmented and obstructed telescope pupils are described. Both concepts use entrance pupil amplitude apodization and a combined phase and amplitude focal plane mask to achieve full ...
Belikov, Ruslan, Cady, Eric, Guyon, Olivier, Hinz, Philip H., Martinache, Frantz   +4 more
core   +2 more sources

Kozmoloji Felsefesi Açısından Teleskopun Önemi

Düzce İlahiyat Dergisi
Gözleme dayalı verilerin genişletilmesine, yeni fenomenlerin gün yüzüne çıkarılmasına ve evrenin doğası ile ilgili anlayışımızı derinleştirmesine yaptığı katkılar nedeniyle, teleskop, insanın evreni anlama ve yorumlama çabasında önemli bir araç olmuştur.
Metin Koçhan
doaj   +1 more source