Results 41 to 50 of about 8,852 (164)

Comparative Methods for Teaching an Astronomical Topic [PDF]

open access: yesInternational Astronomical Union Colloquium, 1990
Astronomy has greatly progressed in this decade. The number of people who are interested in astronomical phenomena is certainly increasing as the number of IAU members increases. These people are divided into several categories, depending on their degrees of interests.
openaire   +1 more source

Astrometric Calibration of MagAO-X with Updated Solutions for HD 165054 Field Stars

open access: yesThe Astronomical Journal
MagAO-X is a recently commissioned extreme adaptive optics instrument for the Magellan Clay 6.5 m telescope at Las Campanas Observatory in Chile. MagAO-X had first light in 2019 and subsequent commissioning observations in 2022 and 2023.
Joseph D. Long   +15 more
doaj   +1 more source

METHOD FOR EVENING ASTRONOMIC OBSERVATIONS

open access: yesGalaxy International Interdisciplinary Research Journal, 2022
This article describes the method of organizing astronomy laboratories and observations in general secondary schools. At the same time, we discussed how practical observations can be made in astronomy, and their types.
openaire   +1 more source

Forced Measurement of Astronomical Sources at Low Signal-to-noise

open access: yesThe Astronomical Journal
We propose a modified moment matching algorithm to avoid catastrophic failures for sources with a low signal to noise ratio. The proposed modifications include a method to eliminate nonphysical negative pixel values and a forced single iteration with an ...
A. Dutta, J. R. Peterson, G. Sembroski
doaj   +1 more source

CSST Slitless Spectra: Target Detection and Classification with Yolo

open access: yesThe 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   +4 more
doaj   +1 more source

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

open access: yesThe 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   +4 more
doaj   +1 more source

AI application to artificial satellite identification in CHEOPS data

open access: yesAstronomy & 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   +4 more
doaj   +1 more source

An Efficient Observational Strategy for the Detection of the Oort Cloud

open access: yesThe 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

Forecasting Constraints from Surface Brightness Fluctuations in Galaxy Clusters

open access: yesThe Astrophysical Journal
Studies of surface brightness (SB) fluctuations in the intracluster medium present an indirect estimate of turbulent pressure support and associated Mach numbers.
Charles E. Romero
doaj   +1 more source

All-Sky brightness monitoring of light pollution with astronomical methods

open access: yesJournal 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.   +3 more
openaire   +4 more sources

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