Results 41 to 50 of about 29,249,487 (323)
Digitization of sunspot drawings by Sp\"orer made in 1861-1894 [PDF]
, 2014 Most of our knowledge about the Sun's activity cycle arises from sunspot observations over the last centuries since telescopes have been used for astronomy. The German astronomer Gustav Sp\"orer observed almost daily the Sun from 1861 until the beginning
Arlt, Rainer +2 more
core +1 more source
IceCat-1: The IceCube Event Catalog of Alert Tracks
The Astrophysical Journal Supplement Series, 2023 We present a catalog of likely astrophysical neutrino track-like events from the IceCube Neutrino Observatory. IceCube began reporting likely astrophysical neutrinos in 2016, and this system was updated in 2019. The catalog presented here includes events
R. Abbasi +393 more
doaj +1 more source
, 2014 The three-body problem, which describes three masses interacting through Newtonian gravity without any restrictions imposed on the initial positions and velocities of these masses, has attracted the attention of many scientists for more than 300 years ...
Musielak, Z. E., Quarles, B.
core +1 more source
Optimization of graded multilayer designs for astronomical x-ray telescopes [PDF]
, 1999 We developed a systematic method for optimizing the design of depth-graded multilayers for astronomical hard-x-ray and soft-γ-ray telescopes based on the instrument’s bandpass and the field of view.
Christensen, Finn E. +3 more
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Extinction correction and on-sky calibration of SCUBA-2
, 2010 Commissioning of SCUBA-2 included a program of skydips and observations of calibration sources intended to be folded into regular observing as standard methods of source flux calibration and to monitor the atmospheric opacity and stability.
Bintley, Dan +4 more
core +1 more source
Multiscale Astronomical Image Processing Based on Nonlinear Partial Differential Equations [PDF]
, 2007 Astronomical applications of recent advances in the field of nonastronomical image processing are presented. These innovative methods, applied to multiscale astronomical images, increase signal-to-noise ratio, do not smear point sources or extended ...
McCollum, Bruce +2 more
core +2 more sources
ConvoSource: Radio-Astronomical Source-Finding with Convolutional Neural Networks [PDF]
Galaxies, 2019 Finding and classifying astronomical sources is key in the scientific exploitation of radio surveys. Source-finding usually involves identifying the parts of an image belonging to an astronomical source, against some estimated background.
Vojislav Lukic, F. Gasperin, M. Bruggen
semanticscholar +1 more source
Simulations for Planning Next-generation Exoplanet Radial Velocity Surveys
The Astronomical Journal, 2023 Future direct imaging missions similar to the HabEx and LUVOIR mission concepts aim to catalog and characterize Earth-mass analogs around nearby stars.
Patrick D Newman +8 more
doaj +1 more source
Some statistical and computational challenges, and opportunities in astronomy [PDF]
, 2004 The data complexity and volume of astronomical findings have increased in recent decades due to major technological improvements in instrumentation and data collection methods.
Babu, G. Jogesh, Djorgovski, S. George
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The Astrophysical Journal, 2023 The simultaneous observation of gravitational waves (GW) and prompt electromagnetic counterparts from the merger of two neutron stars can help reveal the properties of extreme matter and gravity during and immediately after the final plunge.
Chayan Chatterjee, Linqing Wen
doaj +1 more source