Results 1 to 10 of about 200,926 (234)

Dispersion Characteristics of the Multi-mode Fiber-fed VIPA Spectrograph

open access: yesThe Astronomical Journal, 2023
A high-resolution ( ${ \mathcal R }\gt {10}^{5}$ ), multi-mode fiber-fed spectrograph on large telescopes with a reasonable size is desirable in astronomy.
Xiaoming Zhu   +4 more
doaj   +1 more source

A Multilevel Scheduling Framework for Distributed Time-domain Large-area Sky Survey Telescope Array

open access: yesThe Astronomical Journal, 2023
Telescope arrays are receiving increasing attention due to their promise of higher resource utilization, greater sky survey area, and higher frequency of full space-time monitoring than single telescopes.
Yajie Zhang   +7 more
doaj   +1 more source

Solving the Traveling Telescope Problem with Mixed-integer Linear Programming

open access: yesThe Astronomical Journal, 2023
The size and complexity of modern astronomical surveys has grown to the point where, in many cases, traditional human scheduling of observations are tedious at best and impractical at worst.
Luke B. Handley   +2 more
doaj   +1 more source

The Statistical Uncertainties on X-Ray Flux and Spectral Parameters from Chandra ACIS-I Observations of Faint Sources: Application to the Cygnus OB2 Association

open access: yesThe Astrophysical Journal Supplement Series, 2023
We investigate the uncertainties of fitted X-ray model parameters and fluxes for relatively faint Chandra ACIS-I source spectra. Monte Carlo (MC) simulations are employed to construct a large set of 150,000 fake X-ray spectra in the low photon count ...
J. F. Albacete-Colombo   +5 more
doaj   +1 more source

Astroinformatics, data mining and the future of astronomical research [PDF]

open access: yes, 2012
Astronomy, as many other scientific disciplines, is facing a true data deluge which is bound to change both the praxis and the methodology of every day research work.
Giuseppe Longo, Harwit, Massimo Brescia
core   +2 more sources

Monte Carlo Radiative Transfer [PDF]

open access: yes, 2011
I outline methods for calculating the solution of Monte Carlo Radiative Transfer (MCRT) in scattering, absorption and emission processes of dust and gas, including polarization.
Alpert   +32 more
core   +2 more sources

The LAEX and NASA portals for CoRoT public data [PDF]

open access: yes, 2009
* Aims. We describe here the main functionalities of the LAEX (Laboratorio de Astrofisica Estelar y Exoplanetas/Laboratory for Stellar Astrophysics and Exoplanets) and NASA portals for CoRoT Public Data.
A. C. Laity   +39 more
core   +2 more sources

Fast Globally Optimal Catalog Matching using MIQCP

open access: yesThe Astronomical Journal, 2023
We propose a novel exact method to solve the probabilistic catalog matching problem faster than previously possible. Our new approach uses mixed integer programming and introduces quadratic constraints to shrink the problem by multiple orders of ...
Jacob Feitelberg   +2 more
doaj   +1 more source

The Data Big Bang and the Expanding Digital Universe: High-Dimensional, Complex and Massive Data Sets in an Inflationary Epoch [PDF]

open access: yes, 2010
Recent and forthcoming advances in instrumentation, and giant new surveys, are creating astronomical data sets that are not amenable to the methods of analysis familiar to astronomers.
McCollum, Bruce   +2 more
core   +4 more sources

Astronomical observations: a guide for allied researchers

open access: yesThe Open Journal of Astrophysics, 2019
Observational astrophysics uses sophisticated technology to collect and measure electromagnetic and other radiation from beyond the Earth. Modern observatories produce large, complex datasets and extracting the maximum possible information from them ...
Pauline Barmby
doaj   +1 more source

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