Results 31 to 40 of about 1,482 (185)
Ultraviolet and X-ray variability of active galactic nuclei withSwift [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 14 pages, 8 figures, 4 tables in main text, plus 15 pages of figures in appendices.
D. J. K. Buisson +3 more
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The infrared--X-ray continuum correlation in active galactic nuclei [PDF]
Monthly Notices of the Royal Astronomical Society, 2003 The correlation between the soft X-ray and near infrared emission from AGN is analysed using composite models by the code SUMA. We find new evidences for differences in ranges of parameters which characterize the NLR of Seyfert galaxies and LINERs. Results obtained by modelling the Einstein and the ROSAT samples of galaxies are in full agreement.
P. E. Campos +2 more
openaire +3 more sources
X-RAY VARIABILITY AND THE INNER REGION IN ACTIVE GALACTIC NUCLEI [PDF]
The Astrophysical Journal, 2014 32 pages, 11 figures (9 sub-figures); 4 Tables; 1 appendix; published in the Astrophysical ...
P. Mohan, A. Mangalam
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X-ray Reverberation Observational Modelling in Active Galactic Nuclei [PDF]
Proceedings of Accretion Processes in Cosmic Sources – II — PoS(APCS2018), 2019 X-ray reverberation in Active Galactic Nuclei, believed to be the result of the reprocessing of coronal photons by the underlying accretion disc, has allowed us to probe the properties of the inner-most regions of the accretion flow and the central black hole. Our current model (KYNREFREV) computes the time-dependent reflection spectra of the disc as a
V. Karasa +4 more
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X-ray variability of 104 active galactic nuclei [PDF]
Proceedings of the International Astronomical Union, 2012 AbstractWe have performed a uniform analysis of the power spectrum densities (PSDs) of 104 nearby (z<0.4) active galactic nuclei (AGN) using 209 XMM-Newton/pn observations, including several AGN classes. These PSDs span ≃ 3 decades in temporal frequencies, ranging from minutes to days.
O. González-Martín, Simon Vaughan
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The X-Ray Coronae in NuSTAR Bright Active Galactic Nuclei
The Astrophysical Journal, 2022 Abstract We present a systematic and uniform analysis of NuSTAR data of a sample of 60 SWIFT BAT-selected AGNs with 10–78 keV signal-to-noise ratio (S/N) > 50, 10 of which are radio loud. We measure their high-energy cutoff E cut or coronal temperature T e using three different spectral models to ...
Jia-Lai Kang, Jun-Xian Wang
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X-ray absorption in Active Galactic Nuclei
, 2007 10 pages, 4 figures, Conference proceedings to appear in "The Central Engine of Active Galactic Nuclei", ed. L. C. Ho and J.-M. Wang (San Francisco: ASP)
Maiolino, R., Risaliti, G.
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X-ray Observations of Active Galactic Nuclei in the Cosmological Context
Astrophysics and Space Science, 1998 Partial financial support for this work was provided by the DGESID under project PB95-0122. ACF thanks the Royal Society for support.
Barcons, Xavier +6 more
openaire +3 more sources
Extreme X-Ray Iron Lines in Active Galactic Nuclei
The Astrophysical Journal, 2002 We analyze X-ray spectra of heavily obscured (N_H > 10^{24} cm^{-2}) active galaxies obtained with Chandra, concentrating on the iron K alpha fluorescence line. We measure very large equivalent widths in most cases, up to 5 keV in the most extreme example.
Julian H. Krolik +8 more
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From cells to pixels: A decision tree for designing bioimage analysis pipelines
Journal of Microscopy, EarlyView.Abstract Bioimaging has transformed our understanding of biological processes, yet extracting meaningful information from complex datasets remains a challenge, particularly for biologists without computational expertise. This paper proposes a simple general approach, to help identify which image analysis methods could be relevant for a given image ...
Elnaz Fazeli +4 more
wiley +1 more source