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The TMS optical system is based on a decentered dual-reflector system in a Gregorian configuration to observe with an angular resolution of less than $2^\circ$. The primary goal of the present study is to evaluate the final design and…

Instrumentation and Methods for Astrophysics · Physics 2023-09-15 P. Alonso-Arias , P. A. Fuerte-Rodriguez , R. J. Hoyland , J. A. Rubino-Martin

The Haystack Telescope is an antenna with a diameter of 37~m and an elevation-dependent surface accuracy of $\le{}100~\mu{}\rm{}m$ that is capable of millimeter-wave observations. The radome-enclosed instrument serves as a radar sensor for…

Instrumentation and Methods for Astrophysics · Physics 2023-01-10 Jens Kauffmann , Ganesh Rajagopalan , Kazunori Akiyama , Vincent Fish , Colin Lonsdale , Lynn D. Matthews , Thushara G. S. Pillai

We present the spatial part of the point source signal extraction strategy for the upcoming CHORD galaxy survey. CHORD, the Canadian Hydrogen Observatory and Radio-transient Detector, is an under-construction drift-scanning compact…

Instrumentation and Methods for Astrophysics · Physics 2026-03-06 Hans S. Hopkins , Dustin Lang , Kendrick Smith , Kristine Spekkens , Simon Foreman , Akanksha Bij

Opening up a new window of millimeter-wave observations that span frequency bands in the range of 30 to 500 GHz, survey half the sky, and are both an order of magnitude deeper (about 0.5 uK-arcmin) and of higher-resolution (about 10…

Stellar intensity interferometers will achieve stellar imaging with a tenth of a milli- arcsecond resolution in the optical band by taking advantage of the large light collect- ing area and broad range of inter-telescope distances offered…

Instrumentation and Methods for Astrophysics · Physics 2013-03-19 Janvida Rou , Paul D. Nuñez , David Kieda , Stephan LeBohec

Ultra-faint dwarf galaxies, which can be detected as resolved satellite systems of the Milky Way, are critical to understanding galaxy formation, evolution, and the nature of dark matter, as they are the oldest, smallest, most metal-poor,…

Balloon-borne telescopes present unique thermal design challenges which are a combination of those present for both space and ground telescopes. At altitudes of 35-40 km, convection effects are minimal and difficult to characterize.…

Submillimeter cameras now have up to $10^4$ pixels (SCUBA 2). The proposed CCAT 25-meter submillimeter telescope will feature a 1 degree field-of-view. Populating the focal plane at 350 microns would require more than $10^6$ photon-noise…

Assessing marine ecosystems is important for understanding the impacts of climate change and human activity, as well as for maintaining healthy oceans and ecosystems. In marine science, it is common for biologists and geologists to identify…

Methodology · Statistics 2025-11-12 Yuichi Goto , Hiroko Kato Solvang , Masanobu Taniguchi , Tone Falkenhaug

Characterisation of atmospheric optical turbulence is crucial for the design and operation of modern ground-based optical telescopes. In particular, the effective application of adaptive optics correction on large and extremely large…

Instrumentation and Methods for Astrophysics · Physics 2023-03-02 Saavidra Perera , Richard W. Wilson , Tim Butterley , James Osborn , Ollie J. D. Farley , Douglas J. Laidlaw

The very nature of the solar chromosphere, its structuring and dynamics, remains far from being properly understood, in spite of intensive research. Here we point out the potential of chromospheric observations at millimeter wavelengths to…

Astrophysics · Physics 2009-06-23 M. A. Loukitcheva , S. K. Solanki , S. White

This paper presents a non-classic approach to narrow field astrometry that offers a significant improvement over conventional techniques due to enhanced reduction of atmospheric image motion. The method is based on two key elements:…

Astrophysics · Physics 2009-11-13 Petro F. Lazorenko , Galina A. Lazorenko

Context: The mechanism behind the heating of the solar chromosphere remains unclear. Friction between neutrals and charges is expected to contribute to plasma heating in a partially ionised plasma (PIP). Aims: We aim to study the efficiency…

Solar and Stellar Astrophysics · Physics 2025-09-17 M. M. Gómez Míguez , D. Martínez-Gómez , E. Khomenko , B. Popescu Braileanu , M. Collados , P. S. Cally

We introduce a method for detecting astrophysical transients evolving on timescales of milliseconds to minutes using cosmic microwave background (CMB) survey telescopes. While previous transient searches in CMB data operate in map space,…

LISA is a space-based mHz gravitational-wave observatory, with a planned launch in 2034. It is expected to be the first detector of its kind, and will present unique challenges in instrumentation and data analysis. An accurate preflight…

General Relativity and Quantum Cosmology · Physics 2023-04-18 Jean-Baptiste Bayle , Olaf Hartwig

Secondary anisotropies in the cosmic microwave background (CMB) contain information that can be used to test both cosmological models and models of galaxy formation. Starting from lightcone-based HEALPix maps and catalogues, we present a…

Cosmology and Nongalactic Astrophysics · Physics 2026-04-22 Tianyi Yang , Ian G. McCarthy , Fiona McCarthy , Boris Bolliet , Jens Chluba , William Coulton , John C. Helly , Matthieu Schaller , Joop Schaye

In the era of the Internet of Things (IoT), objects connect through a dynamic network, empowered by technologies like 5G, enabling real-time data sharing. However, smart objects, notably autonomous vehicles, face challenges in critical…

Computer Vision and Pattern Recognition · Computer Science 2025-02-18 Benoît Gérin , Anaïs Halin , Anthony Cioppa , Maxim Henry , Bernard Ghanem , Benoît Macq , Christophe De Vleeschouwer , Marc Van Droogenbroeck

The interaction of plasma with magnetic field in the partially ionised solar atmosphere is frequently modelled via a single-fluid approximation, which is valid for the case of a strongly coupled collisional media, such as solar photosphere…

Solar and Stellar Astrophysics · Physics 2018-07-18 P. A. González-Morales , E. Khomenko , T. P. Downes , A. de Vicente

High resolution (~1 arcminute) astronomical imaging at low frequency (below 150 MHz) has only recently become practical with the development of new calibration algorithms for removing ionospheric distortions. In addition to opening a new…

Instrumentation and Methods for Astrophysics · Physics 2015-05-13 A. S. Cohen , H. J. A. Röttgering

The High-Altitude Water Cherenkov (HAWC) Experiment is a second-generation highsensitivity gamma-ray and cosmic-ray detector that builds on the experience and technology of the Milagro observatory. Like Milagro, HAWC utilizes the water…

Instrumentation and Methods for Astrophysics · Physics 2009-09-16 Petra Huentemeyer , John A. J. Matthews , Brenda Dingus
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