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Abstract We describe the variability in nearly continuous optical observations of the bright radio-loud quasar 3C 273 and nine additional active galactic nuclei detected with the Fermi Gamma-ray Space Telescope Large Area Telescope, describing the variability in nearly continuous optical measurements of the vibrant radio-loud quasar 3C 273 and nine additional active galactic nuclei detected with the Fermi Gamma-ray Space Telescope Large Area Telescope' Optical recordings were made during the K2 mission with the Kepler spacecraft from 49 to 83 days during a time period of 49 to 83 days, with a 1 minute or 30 minutes cadences between 2015-2017. Overall, the slopes of most PSDs, as well as those published in a previous paper, were consistent with those produced by turbulence in the relativistic jet, not by "hot spots" in the disk emission, and not in the area of "hot spots" in the disk release. The observed range of PSD slopes can also be obtained by means operating in the jet other than turbulence, such as "mini-jets" or "jet-in-jets. " The 3C 273 optical amplitude during the K2 observations can be attributed to both accretion disk and jet models.
Source link: https://doi.org/10.3847/1538-4357/abbb92
With the Catalina Surveys Data Release 2, we present an optical variability report based on a statistical sample of AGN obtained from the crossmatching of a pre-existing multi-wavelength based catalog. To obtain a fine sample of 400 quasars widespread during a large period of redshift and bolometric luminosity, visual inspection of the light curves and a novel estimate of the photometric error related to the Catalina Sky Surveys have been useful.
Source link: https://doi.org/10.1088/1742-6596/1548/1/012015
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