Results 111 to 120 of about 128,880 (312)

Speckle Observations With PISCO in Calern (France): III. Astrometric Measurements of Visual Double Stars in 2019 and New or Revised Orbits for STT531 AB, STT77 AB, STF1338 AB, COU1746, STT260, A1109 AB, HU1291, and A632 AB

Astronomische Nachrichten, EarlyView.
ABSTRACT We present relative astrometric measurements of visual double stars, made in 2019 with the speckle camera PISCO at the 1‐m Epsilon telescope of the C2PU facility (Observatoire de la Côte d'Azur, Calern site). Our observing list contains orbital couples as well as double stars whose motion is still uncertain.
J.‐L. Prieur, M. Scardia, J.‐P. Rivet, E. Aristidi, J. F. Ling, L. Piccotti, L. Pansecchi, R. W. Argyle, L. Abe, P. Bendjoya, L. Maccarini, D. Vernet   +11 more
wiley   +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

The prototype Schwarzschild Couder Telescope: A Medium-Sized Telescope for the Cherenkov Telescope Array

EPJ Web of Conferences, 2023
The Schwarzschild-Couder Telescope (SCT) is a dual-mirror telescope designed for the Cherenkov Telescope Array Observatory (CTAO) to observe very-high-energy gamma rays (20 GeV to 300 TeV). It features a dualmirror system and a high-resolution camera with an 8° field of view (FoV) for enhanced angular resolution and background rejection.
openaire   +2 more sources

Revisiting Variable Stars Toward the Globular Cluster NGC 6496 With ATLAS and Gaia Photometry

Astronomische Nachrichten, EarlyView.
ABSTRACT We revisit 13 variable stars in the field of the metal‐rich globular cluster NGC 6496, discovered by Abbas et al. (2015; Astronomical Journal 149:40) (hereafter referred to as “MA15”) via time‐series data, spanning 2 years. We improve upon the MA15 characterization of the variables using ATLAS time‐series photometry data, spanning 8 years, in ...
Madison E. Martin, Andrew Layden, Andrew McNeill   +2 more
wiley   +1 more source

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

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

Gamma ray Cerenkov telescope image analysis [PDF]

, 1997
The subject of this thesis is ground based gamma ray astronomy using the imaging atmospheric Cerenkov technique. The first two chapters are introductory, and describe the field of gamma ray astronomy, the generation of extensive air showers in the ...
Holder, J., Holder, Jamie
core  

A Compact High Energy Camera (CHEC) for the Gamma-ray Cherenkov Telescope of the Cherenkov Telescope Array [PDF]

, 2017
The Gamma-ray Cherenkov Telescope (GCT) is one of the Small Size Telescopes (SSTs) proposed for the Cherenkov Telescope Array (CTA) aimed at the 1 TeV to 300 TeV energy range.
White, Richard, Schoorlemmer, Harm, Cherenkov Telescope Array Consortium   +2 more
core   +1 more source

Listening to Hong Kong children's perspectives through pretend play

British Educational Research Journal, EarlyView.
Abstract Quality in early childhood education and care (ECEC) has become an increasing concern in recent years. The issue has been regularly discussed by different stakeholders. However, the rising concern regarding quality in ECEC has not seriously taken into account children's perspectives.
Suzannie K. Y. Leung
wiley   +1 more source

Modular One‐Pot Access to π‐Expanded Tetrakis(Phenothiazinyl)‐Silanes With Broadly Tunable Redox and Emission Properties

Chemistry – A European Journal, EarlyView.
A library of 21 tetrakis(phenothiazinyl)‐substituted silanes with broadly variable substituent decoration, which are fully reversible multistage redox systems with intense tunable emission from deep blue to yellow–green (441–533 nm), was rapidly synthesized by bromine–lithium exchange/borylation–Suzuki coupling of tetrakis(4‐bromophenyl)silane or by ...
Thomas P. M. Merke, Lysander Presser, Leonard Karl, Christian Ganter, Thomas J. J. Müller   +4 more
wiley   +1 more source