Results 1 to 10 of about 93,140 (307)

More Efficient and Reliable: Identifying RRab Stars with Blazhko Effect by Deep Convolutional Neural Network

open access: yesUniverse
The physical origin of the Blazhko effect (BL), a phenomenon of a single or multiple periodic modulation(s) of the light curve, is under debate. Efficiently identifying and characterizing the BL is essential in understanding its origins and accounting ...
Nan Jiang   +6 more
doaj   +1 more source

Atmospheric Extinction Corrections for WET Observations

open access: yesOpen Astronomy, 2003
Account of the extinction in the Earth’s atmosphere is an important part of the WET light curve reduction procedures. Usually, WET observations are not corrected for the second order extinction effects: the dependence of the extinction coefficient on ...
Pakštienė E., Solheim J. E.
doaj   +1 more source

On a New Technique for Discovering Variable Stars

open access: yesOpen Astronomy, 2003
A technique for discovering variable stars based on the calculation of the correlation coefficients is proposed. Applications of the technique are shown on the results of numerical experiments and on the Hipparcos photometric data.
Mironov A. V.   +2 more
doaj   +1 more source

Photoelectric Vilnius Photometry of Stars in the Mega Proper Motion Field KA 10

open access: yesOpen Astronomy, 2003
Photoelectric seven-color photometry in the Vilnius medium-band, system is obtained for 87 stars down to V≃13.0 in the Kiev proper motion field KA10 [l = 137°, b = -59°]. The size of the field is 1.4 square degrees.
Bartašiutė S.
doaj   +1 more source

METHOD FOR EVALUATING THE ASTROMETRIC AND PHOTOMETRIC CHARACTERISTICS OF COMMERCIAL SCANNERS IN THEIR APPLICATION FOR THE SCIENTIFIC PURPOSE

open access: yesOdessa Astronomical Publications, 2014
Method  for estimating the accuracy of astrometric  (rectangular coordinates) and photometric (diameters and magnitudes) characteristics of commercial scanners is proposed and applied.
Yu. I. Protsyuk   +10 more
doaj   +1 more source

PHOTOMETRIC DETERMINATION OF IRON. [PDF]

open access: yesJournal of the American Chemical Society, 1902
n ...
Hinds, J. I. D., Cullum, Myrtis Louise
openaire   +2 more sources

Correction of UBV Photometry for Emission Lines

open access: yesOpen Astronomy, 2003
We investigate the effect on U,B,V magnitudes of the removal of emission lines from the spectra of some symbiotic stars and novae during their nebular phases.
Skopal A.
doaj   +1 more source

Modeling Long-Term Photometric Data of Trans-Neptunian Objects and Centaurs

open access: yesFrontiers in Astronomy and Space Sciences, 2022
Trans-Neptunian objects and Centaurs are small Solar System bodies that reside in the outer parts of the Solar System. These objects present photometric behaviors that are influenced due to a change in their aspect angle.
Estela Fernández-Valenzuela
doaj   +1 more source

Photometric Ambient Occlusion [PDF]

open access: yes2013 IEEE Conference on Computer Vision and Pattern Recognition, 2013
We present a method for computing ambient occlusion (AO) for a stack of images of a scene from a fixed viewpoint. Ambient occlusion, a concept common in computer graphics, characterizes the local visibility at a point: it approximates how much light can reach that point from different directions without getting blocked by other geometry.
Daniel Cabrini Hauagge   +3 more
openaire   +2 more sources

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