Results 1 to 10 of about 81,210 (254)
A model for suppressing stray light in astronomical images based on deep learning [PDF]
Scientific ReportsWide-Field Small Aperture Telescopes (WFSAT) are widely used for surveilling space objects. Due to their wide-field of view (FOV) characteristics, these telescopes can cover a large areas of the sky at once, improving observation efficiency.
Mo Chen +9 more
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Astrometric Calibration and Performance of the Dark Energy Spectroscopic Instrument Focal Plane
The Astronomical Journal, 2023 The Dark Energy Spectroscopic Instrument, consisting of 5020 robotic fiber positioners and associated systems on the Mayall telescope at Kitt Peak, Arizona, is carrying out a survey to measure the spectra of 40 million galaxies and quasars and produce ...
S. Kent +48 more
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Towards a BRICS Optical Transient Network (BRICS-OTN) [PDF]
Anais 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
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Predicting the Yields of z > 6.5 Quasar Surveys in the Era of Roman and Rubin
The Astrophysical Journal, 2023 About 70 luminous quasars discovered at z > 6.5 are strongly biased toward the bright end, thus not providing a comprehensive view of quasar abundance beyond the cosmic dawn. We present the predicted results of the Roman/Rubin high-redshift quasar survey,
Wei Leong Tee +5 more
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A 20 m wide-field diffraction-limited telescope [PDF]
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2020 A 20 m space telescope is described with an unvignetted 1° field of view—a hundred times larger in area than fields of existing space telescopes. Its diffraction-limited images are a hundred times sharper than from wide-field ground-based telescopes and extend over much if not all the field, 40 arcmin diameter at 500 nm wavelength, for example.
Ryker W. Eads, J. Roger P. Angel
openaire +2 more sources
PhotoniX, 2023 Astrophysics and cosmology in the coming decades urgently need a large field-of-view (FOV), highly multiplexed spectroscopic survey telescope satisfying challenging image quality and stability requirements.
Yifan Zhang +11 more
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Target Detection Framework for Lobster Eye X-Ray Telescopes with Machine-learning Algorithms
The Astrophysical Journal Supplement Series, 2023 Lobster eye telescopes are ideal monitors to detect X-ray transients because they could observe celestial objects over a wide field of view in the X-ray band.
Peng Jia, Wenbo Liu, Yuan Liu, Haiwu Pan
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Freeform Wide Field-of-View Spaceborne Imaging Telescope: From Design to Demonstrator
Sensors, 2022 Wide field-of-view imaging optics offer a huge potential for space-based Earth observation enabling the capture of global data. Reflective imaging telescopes are often favored, as they do not show chromatic aberrations and are less susceptible to ...
Luca Schifano +7 more
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Generic Misalignment Aberration Patterns in Wide-Field Telescopes [PDF]
, 2011 Axially symmetric telescopes produce well known "Seidel" off-axis third-order aberration patterns: coma, astigmatism, curvature of field and distortion. When axial symmetry is broken by the small misalignments of optical elements, additional third-order ...
Levinson, Rebecca Sobel +1 more
core +3 more sources
Third-Generation Calibrations for MeerKAT Observation
Galaxies, 2021 Superclusters and galaxy clusters offer a wide range of astrophysical science topics with regards to studying the evolution and distribution of galaxies, intra-cluster magnetization mediums, cosmic ray accelerations and large scale diffuse radio sources ...
Viral Parekh +4 more
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