Browsing by Subject "Galaxies active"
Now showing items 1-7 of 7
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(Oxford university press, 2017)Recent high angular resolution observations resolved for the first time the mid-infrared (MIR) structure of nearby active galactic nuclei (AGN). Surprisingly, they revealed that a major fraction of their MIR emission comes ...
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(IOP Publishing Ltd, 2017)We report on the second installment of an X-ray monitoring project of seven luminous radio-quiet quasars (RQQs). New Chandra observations of four of these, at 4.10 <= z <= 4.35, yield a total of six X-ray epochs per source, ...
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(IOP Publishing Ltd., 2017)We present our statistical study of near-infrared (NIR) variability of X-ray-selected active galactic nuclei (AGNs) in the COSMOS field, using UltraVISTA data. This is the largest sample of AGN light curves in YJHK(s) ...
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(IOP Publishing Ltd, 2017)During the Space Telescope and Optical Reverberation Mapping Project observations of NGC 5548, the continuum and emission-line variability became decorrelated during the second half of the six-month-long observing campaign. ...
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The hunt for red quasars: luminous obscured black hole growth unveiled in the stripe 82 X-Ray survey (IOP Publishing Ltd, 2017)We present results of a ground-based near-infrared campaign with Palomar TripleSpec, Keck NIRSPEC, and Gemini GNIRS to target two samples of reddened active galactic nucleus (AGN) candidates from the 31 deg(2) Stripe 82 ...
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(IOP Publishing Ltd., 2017)We present a study of the average X-ray spectral properties of the sources detected by the NuSTAR extragalactic survey, comprising observations of the Extended Chandra Deep Field South (E-CDFS), Extended Groth Strip (EGS), ...
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(IOP Publishing Ltd, 2017)We identify sources with extremely hard X-ray spectra (i.e., with photon indices of Gamma less than or similar to 0.6) in the 13 deg(2) NuSTAR serendipitous survey, to search for the most highly obscured active galactic ...