Results 11 to 20 of about 293 (94)
QUANTIFYING QUASAR VARIABILITY AS PART OF A GENERAL APPROACH TO CLASSIFYING CONTINUOUSLY VARYING SOURCES [PDF]
The Astrophysical Journal, 2009 Robust fast methods to classify variable light curves in large sky surveys are becoming increasingly important. While it is relatively straightforward to identify common periodic stars and particular transient events (supernovae, novae, microlensing), there is no equivalent for non-periodic continuously varying sources (quasars, aperiodic stellar ...
Michał K. Szymański +13 more
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Detecting quasars at very high redshift with next generation X-ray telescopes [PDF]
Monthly Notices of the Royal Astronomical Society, 2008 18 pages, 11 Figures. Version accepted to MNRAS; extra data plotted, XEUS and Con-X sensitivities corrected and predictions amended ...
Kirsty J. Rhook, Martin G. Haehnelt
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THE NEXT GENERATION ATLAS OF QUASAR SPECTRAL ENERGY DISTRIBUTIONS FROM RADIO TO X-RAYS [PDF]
The Astrophysical Journal Supplement Series, 2011 We have produced the next generation of quasar spectral energy distributions (SEDs), essentially updating the work of Elvis et al. (1994) by using high-quality data obtained with several space and ground-based telescopes, including NASA's Great Observatories.
Daniel A. Dale +20 more
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Monthly Notices of the Royal Astronomical Society, 2023 ABSTRACT Photometric reverberation mapping can detect the radial extent of the accretion disc (AD) in Active Galactic Nuclei by measuring the time delays between light curves observed in different continuum bands. Quantifying the constraints on the efficiency and accuracy of the delay measurements is important for recovering the AD size ...
F Pozo Nuñez +7 more
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psfgan: a generative adversarial network system for separating quasar point sources and host galaxy light [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 ISSN:0035 ...
Kevin Schawinski +10 more
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QUASAR-370 hybrid phototube as a prototype of a photodetector for the next generation of deep underwater neutrino telescopes [PDF]
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2009 To be published in ...
B. K. Lubsandorzhiev +1 more
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Modern Physics Letters A, 2023 Dark energy is the largest fraction of the energy density of our universe — yet it remains one of the enduring enigmas of our times. Here we show that dark energy can be used to solve 2 tantalizing mysteries of the observable universe. We build on existing models of dark energy linked to neutrino masses.
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The general relativistic theory of quasars
, 2000 The paper was a preliminary and rejected by the author attempt to describe compact relativistic objects.
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Spin and mass of the nearest supermassive black hole [PDF]
Journal of Astrophysics & Aerospace Technology, 2014 Quasi-Periodic Oscillations (QPOs) of the hot plasma spots or clumps orbiting an accreting black hole contain information on the black hole mass and spin. The promising observational signatures for the measurement of black hole mass and spin are the latitudinal oscillation frequency of the bright spots in the accretion flow and the frequency of black ...
Alex, re Humberto Andrei
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