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SUMMARY:Unveiling the periodic variability patterns of the multiwavelength
  light emission from the blazar PG 1553+113
DTSTART;VALUE=DATE-TIME:20230630T103000Z
DTEND;VALUE=DATE-TIME:20230630T104500Z
DTSTAMP;VALUE=DATE-TIME:20261006T095509Z
UID:indico-contribution-844@cern.ch
DESCRIPTION:Speakers: Tommaso Aniello (INAF OAR)\nThe characteristic varia
 bility of blazars is being since long time explained by relating it to a w
 ide range of possible physical processes\, occurring in the accretion disk
  and/or the jet. The various scenarios include emission spots in the accre
 tion disk revolving around the supermassive black hole\, magnetohydrodynam
 ic instabilities in the disk or the jet\, shocks traveling along turbulent
  jets\, and relativistic effects due to the jet orientation. In the X-ray 
 band\, the background emission generated by the accretion disk seems to ou
 tshine any possible additional source of variability\, such as the periodi
 city induced by the presence of a binary black hole in the central engine.
  The purpose of our work is the search of periodicity in the X-ray\, UV an
 d optical light curves of the blazar PG 1553+113 with Swift-XRT data spann
 ing ten years from 2012 to 2022. This source is already known to exhibit p
 eriodic variability in the optical and the gamma-rays with a period of 2.2
  yr only\, we have performed a robust statistical analysis of the light cu
 rve. Our results confirm that the PG 1553+113 X-ray emission displays a pe
 riodicity shorter by a factor of ~40% than the gamma-ray one. We also inve
 stigated the cross-correlations between the light curves of this source in
  several bands\, in search of possible time delays that could help to disc
 riminate the spatial distribution of the various emitting region.\n\nhttps
 ://indico.unina.it/event/61/contributions/844/
LOCATION:Centro Congressi Federico II Aula Magna
URL:https://indico.unina.it/event/61/contributions/844/
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