Results 11 to 20 of about 8,852 (164)

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

open access: yesThe 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   +6 more sources

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

Methods of Astronomical Navigation [PDF]

open access: yesJournal of Navigation, 1955
I think the Institute is doing a grand job in this matter of getting to the bottom of what actually happens at sea. I give a personal ‘shabash’ to D. H. Sadler & Co. for the new Abridged Nautical Almanac, and to S. M. Burton for the first-ever really practical manual and tables, but I am now completely ‘sold’ on H.D.
openaire   +1 more source

A method for finding anomalous astronomical light curves and their analogues [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2021
ABSTRACT Our understanding of the Universe has profited from deliberate targeted studies of known phenomena, as well as from serendipitous unexpected discoveries, such as the discovery of a complex variability pattern in the direction of KIC 8462852 (Boyajian’s star). Upcoming surveys such as the Vera C.
J Rafael Martínez-Galarza   +6 more
openaire   +3 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

On the Application of Interference Methods to Astronomical Measurements

open access: yesProceedings of the National Academy of Sciences of the United States of America, 1920
exaly   +3 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

Method of Distributing Astronomical Predictions [PDF]

open access: yesNature, 1876
I BEG leave to observe that the very useful method of distributing astronomical predictions over a given geographical area alluded to in NATURE, vol. xiii., page 71, and ascribed there to Mr. W. S. B. Woolhouse, was already proposed by my father, J. J.
openaire   +1 more source

On a Method of reproducing Astronomical Photographs [PDF]

open access: yesNature, 1897
PROF. MAX WOLF, in his excellent article on the “Reflector and Portrait Lens in Celestial Photography,” published in your issue of April 22 last, mentions a method of “reproducing nebulous masses” from original negatives, and refers to my reproduction of a photograph of the nebula M. 8, done in collaboration with Mr. Lunt.
openaire   +1 more source

What’s the Difference? The Potential for Convolutional Neural Networks for Transient Detection without Template Subtraction

open access: yesThe Astronomical Journal, 2023
We present a study of the potential for convolutional neural networks (CNNs) to enable separation of astrophysical transients from image artifacts, a task known as “real–bogus” classification, without requiring a template-subtracted (or difference) image,
Tatiana Acero-Cuellar   +5 more
doaj   +1 more source

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