Results 1 to 10 of about 2,474,049 (303)

Towards a BRICS Optical Transient Network (BRICS-OTN) [PDF]

open access: yesAnais da Academia Brasileira de Ciências, 2021
This paper is based on a proposal submitted for a BRICS astronomy flagship program, which was presented at the 2019 meeting of the BRICS Astronomy Working Group, held in Rio de Janeiro from 29 September to 2 October 2019.
DAVID A.H. BUCKLEY   +10 more
doaj   +1 more source

Twin High-Resolution, High-Speed Imagers for the Gemini Telescopes: Instrument Description and Science Verification Results

open access: yesFrontiers in Astronomy and Space Sciences, 2021
Two new imaging instruments, ‘Alopeke and Zorro, were designed, built, and commissioned at the Gemini-North and Gemini-South telescopes in 2018 and 2019, respectively. Here we describe them and present the results from over a year of operation.
Nicholas J. Scott   +11 more
doaj   +1 more source

Precipitable Water Vapor Conditions for Infrared Observations at Korean Astronomical Observatories [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2007
KASINICS (Korea Astronomy and Space Science Institute Near Infrared Camera System) is equipped with a InSb array which can observe 1--5~μm bands in near-infrared.
Sungho Lee   +10 more
doaj   +1 more source

Near-Infrared Observing Conditions at the BOAO and the SOAO [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2004
Korea Astronomy Observatory(KAO) has been developing the KAONICS, KAO Near-Infrared Camera System, which will be used for near-infrared observations in the ground-based telescopes of Korea.
Bongkon Moon   +6 more
doaj   +1 more source

Spectroscopic evidence for a large spot on the dimming Betelgeuse

open access: yesNature Communications, 2021
The reason of the dimming of Betelgeuse is debated. Here, the authors show effective temperature decrease that can be explained by a large spot.
Sofya Alexeeva   +6 more
doaj   +1 more source

Optical Polarimetry in Undergraduate Education [PDF]

open access: yesEPJ Web of Conferences, 2019
Polarimetry plays an important part in observational astronomy, but it is all too often given limited attention in astronomy textbooks. Coupled with a sometimes confusing mathematical introduction, students may feel that polarization is a difficult ...
Topasna Gregory
doaj   +1 more source

Frequency-insensitive spatiotemporal shaping of single photon in multiuser quantum network

open access: yesnpj Quantum Information, 2023
Exploiting the fundamental features of quantum mechanics, an entanglement-based quantum network offers a promising platform for many dramatic applications such as multi-user cryptography.
Yiwen Huang   +9 more
doaj   +1 more source

Optical Property and Alighment of KAO Wide Field Telescope (NEOPAT-3) [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2004
We have investigated the optical property of the KAO(Korea Astronomy Observatory) wide field telescope (named NEOPAT-3; Near Earth Object and Satellite Patrol-3) and aligned optical system.
In-Soo Yuk   +9 more
doaj   +1 more source

Optical Orbit Determination of a Geosynchronous Earth Orbit Satellite Effected by Baseline Distances between Various Ground-based Tracking Stations Ⅱ: COMS Case with Analysis of Actual Observation Data [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2015
We estimated the orbit of the Communication, Ocean and Meteorological Satellite (COMS), a Geostationary Earth Orbit (GEO) satellite, through data from actual optical observations using telescopes at the Sobaeksan Optical Astronomy Observatory (SOAO) of
Ju Young Son   +11 more
doaj   +1 more source

Coordinated Micro-Variability CIRCE Polarimetry and SARA JKT Multi-Frequency Photometry Observations of the Blazar S5 0716+71

open access: yesGalaxies, 2017
A critical observation for testing the KRM jet model, in development at FIU, is to observe high time resolution, high accuracy photometry and polarimetry over a wide range of frequencies in the optically thin portion of the synchrotron spectrum.
James R. Webb   +4 more
doaj   +1 more source

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