Results 61 to 70 of about 200,926 (234)

CSST Slitless Spectra: Target Detection and Classification with Yolo

The Astronomical Journal
Addressing the spatial uncertainty and spectral blending challenges in China Space Station Telescope slitless spectroscopy, we present a deep learning-driven, end-to-end framework based on the You Only Look Once (YOLO) models.
Yingying Zhou, Chao Liu, Hao Tian, Xin Zhang, Nan Li   +4 more
doaj   +1 more source

Probabilistic Auto-Associative Models and Semi-Linear PCA [PDF]

, 2012
Auto-Associative models cover a large class of methods used in data analysis. In this paper, we describe the generals properties of these models when the projection component is linear and we propose and test an easy to implement Probabilistic Semi ...
Iovleff, Serge
core  

All-Sky brightness monitoring of light pollution with astronomical methods

Journal of Environmental Management, 2010
This paper describes a mobile prototype and a protocol to measure light pollution based on astronomical methods. The prototype takes three all-sky images using BVR filters of the Johnson-Cousins astronomical photometric system. The stars are then identified in the images of the Hipparcos and General Catalogue of Photometric Data II astronomical ...
Rabaza, O., Galadí-Enríquez, David, Espín Estrella, A., Aznar Dols, F.   +3 more
openaire   +4 more sources

A Formalism for Calibrating the Instrumental Polarization of Radio Interferometric Arrays at Meter Wavelengths Using Unpolarized Sky: A Demonstration Using MWA Observations

The Astrophysical Journal Supplement Series
Calibration of instrumental polarization is critical for measuring polarized radio emissions from astrophysical sources to extract the magnetic field information in astrophysical, heliospheric, and terrestrial plasmas.
Devojyoti Kansabanik, Angelos Vourlidas, Soham Dey, Surajit Mondal, Divya Oberoi   +4 more
doaj   +1 more source

AI application to artificial satellite identification in CHEOPS data

Astronomy & Astrophysics
Context. The rapid proliferation of artificial satellites poses a growing challenge to astronomical observations, calling for robust methods to flag and mitigate their impact on scientific data quality.
García-Martín Pablo, Gonçalves Luís, Hellmich Stephan, Billot Nicolas, Merín Bruno   +4 more
doaj   +1 more source

An Efficient Observational Strategy for the Detection of the Oort Cloud

The Astronomical Journal
The Oort cloud is presumably a pristine relic of the solar system formation. Detection of the Oort cloud may provide information regarding the stellar environment in which the Sun was born and on the planetesimal population during the outer planets ...
Eran O. Ofek, Sarah A. Spitzer, Guy Nir
doaj   +1 more source

Submillimeter wave detection with superconducting tunnel diodes [PDF]

Superconductor-Insulator-Superconductor (SIS) diodes are the detector elements in the most sensitive heterodyne receivers available from 100 to 500 GHz. SIS mixers are the front end of radio astronomical systems around the world.
Wengler, Michael J.
core   +1 more source

Data analysis methods in astronomic objects classification (Sloan Digital Sky Survey DR14)

, 2021
V. A. Golov, D. A. Petrusevich
openalex   +2 more sources

A foldable 4.27 meter (14 foot) spacecraft antenna [PDF]

, 1972
The problems and solutions associated with the design, fabrication, and testing of a large, lightweight, radial-rib, folding, spacecraft antenna reflector are discussed.
Starkey, D. J.
core   +1 more source

On the Application of Interference Methods to Astronomical Measurements [PDF]

The Astrophysical Journal, 1890
(1890). I. On the application of interference methods to astronomical measurements. The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science: Vol. 30, No. 182, pp. 1-21.
openaire   +4 more sources