Aug 2026· Astronomical Telescopes + Instrumentation· Vol 14148, pp. 141480G - 141480G-20· 0 citations· 51 references
Engineering
Abstract
The Center for High Angular Resolution Astronomy (CHARA) Array is a six-element interferometer at Mount Wilson Observatory with baselines ranging from 34 to 331m. The Array hosts a number of new or upgraded, six-telescope beam combiners that span the spectrum from the visible R-band to the near-infrared K-band with a range in available spectral resolution. The most recent is the Silmaril combiner that is a three-telescope instrument for H and K-bands that is designed for very high sensitivity on fainter targets. A seventh, mobile telescope is now on-site for use with fiber optics for H-band beam transport. The mobile telescope will extend the baseline range from 20m to 579m, creating new opportunities for measurements of stars with large and small angular diameters. Observing time is available to the community through a program funded by NSF. The observing programs are solicited and peer-reviewed by NSF’s NOIRLab. This paper summarizes the astronomical work and technical advances made over the last two years.
The Cherenkov Telescope Array Observatory (CTAO) is establishing two sites: in La Palma, Canary Islands, and Paranal, Chile, to observe gamma-ray sky from 0.03 to 300 TeV with high sensitivity and resolution. It involves 70 air Cherenkov telescopes of various sizes. Four 23-meter parabolic Large-Sized Telescopes (LSTs)...
G. Sironi, L. Proserpio, G. Pareschi et al.· Astronomical Telescopes + In...· 0 citations
The Multi-Aperture Spectroscopic Telescope (MAST) is an array of twenty 61 cm prime-focus telescopes designed to address the growing mismatch between the discovery rate of wide-field photometric surveys and the availability of efficient spectroscopic follow-up facilities. All telescopes are fiber-fed to two shared spec...
S. Ben-Ami, E. Ofek, O. Yaron et al.· Astronomical Telescopes + In...· 0 citations
The Global Open Transient Telescope Array (GOTTA), also referred to as SiTian, is an ambitious project to build a distributed network of wide-field 1m class telescopes. Its goal is to survey the entire accessible optical sky with a cadence of 30 minutes and three colors to a 5σ depth of ∼21.5 mag. This capability will...
Hu Zou, Zheng-Yang Li, Min He et al.· Astronomical Telescopes + In...· 0 citations
Stellar intensity interferometry (SII) promises significant gains in angular resolution that is well beyond what is currently available. Hanbury Brown in the 1960s measured the diameters of 32 stars, mainly on the main sequence, at his Narrabri SII setup at resolutions of 500μas, heralding the age of quantum optics [1]...
C. Carlile· Astronomical Telescopes + In...· 0 citations
We developed a near-IR, échelle-like, fiber-fed spectrograph demonstrator using a VIPA instead of an échelle grating, achieving a high spectral resolution (R=80,000) over a 220 nm range with 38% efficiency (from fiber exit to H2RG detector). Designed to characterize exoplanets at high spectral resolution with an XAO in...
A. Carlotti, S. Martos, D. Mouillet et al.· Astronomical Telescopes + In...· 0 citations
We present the rationale, design, methodology, and observational facilities of a high-angular-resolution imaging survey of stars within 18~pc of the Sun. Our comprehensive sample consists of 2047 stars compiled from Gaia eDR3 and complementary catalogs. The main goal is to observe as many stars from this sample as poss...
F. C. Rojas Galindo, V. Orlov, R. A. Méndez et al.· 0 citations
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