Results 51 to 60 of about 200,926 (234)
Efficient data structures for masks on 2D grids
, 2015 This article discusses various methods of representing and manipulating arbitrary coverage information in two dimensions, with a focus on space- and time-efficiency when processing such coverages, storing them on disk, and transmitting them between ...
Hivon, Eric, Reinecke, Martin
core +2 more sources
, 2011 The Next Generation Virgo Cluster Survey is a 104 square degree survey of the Virgo Cluster, carried out using the MegaPrime camera of the Canada-France-Hawaii telescope, from semesters 2009A-2012A.
Binggeli B, Sandage A, Tammann GA (1985) Studies of the Virgo cluster. II. A catalog of +6 more
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Relativistic Astronomy. III. Test of Special Relativity via Doppler Effect
, 2019 The Breakthrough Starshot program is planning to send transrelativistic probes to travel to nearby stellar systems within decades. Because the probe velocity is designed to be a good fraction of the light speed, Zhang & Li recently proposed that these ...
Yang, Yuan-Pei +2 more
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Multiscale Decomposition of Astronomical Maps: A Constrained Diffusion Method
The Astrophysical Journal Supplement Series, 2022 Abstract We propose a new, efficient multiscale method to decompose a map (or signal in general) into component maps that contain structures of different sizes. In the widely used wave transform, artifacts containing negative values arise around regions with sharp transitions due to the application of band-limited filters.
openaire +2 more sources
Survival analysis, or what to do with upper limits in astronomical surveys [PDF]
A field of applied statistics called survival analysis has been developed over several decades to deal with censored data, which occur in astronomical surveys when objects are too faint to be detected.
Feigelson, Eric D., Isobe, Takashi
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Infrared spectroscopy of HCOOH in interstellar ice analogues
, 2007 Context: HCOOH is one of the more common species in interstellar ices with abundances of 1-5% with respect to solid H2O. Aims: This study aims at characterizing the HCOOH spectral features in astrophysically relevant ice mixtures in order to interpret ...
A. C. A. Boogert +41 more
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An Intelligent Detection Method of Astronomical Transients Based on Lightweight CNN Model [PDF]
, 2023 Xiaobin Li +3 more
openalex +1 more source
Astrometric Calibration of MagAO-X with Updated Solutions for HD 165054 Field Stars
The Astronomical JournalMagAO-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
Montage: a grid portal and software toolkit for science-grade astronomical image mosaicking
, 2009 Montage is a portable software toolkit for constructing custom, science-grade mosaics by composing multiple astronomical images. The mosaics constructed by Montage preserve the astrometry (position) and photometry (intensity) of the sources in the input ...
Berriman, G. Bruce +10 more
core +1 more source
Forced Measurement of Astronomical Sources at Low Signal-to-noise
The Astronomical JournalWe 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