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SUMMARY:Long and short term\, X-ray/optical/UV time-lags in AGN
DTSTART;VALUE=DATE-TIME:20230626T100000Z
DTEND;VALUE=DATE-TIME:20230626T101500Z
DTSTAMP;VALUE=DATE-TIME:20260410T202042Z
UID:indico-contribution-876@cern.ch
DESCRIPTION:Speakers: Iossif Papadakis ()\nRecent multi-wavelength surveys
  of a few AGN have given us the opportunity to constrain well the cross-co
 rrelation between the X-rays and the UV/optical variations in these object
 s. The variations in the UV lead the variations detected at longer wavelen
 gths in almost all cases where good quality light curves\, in many waveban
 ds\, exist. However\, there have been indications that the optical variati
 ons lead the UV variations on the longest sampled time scales in a few obj
 ects. This could indicate the presence of accretion rate variations which 
 propagate inwards. We use well sampled\, long light curves of a few Seyfer
 t galaxies to compute the time lags on both long and short time scales. We
  will present the results regarding the dependence of the observed time-la
 gs on the probed time-scale\, and we will discuss possible constraints on 
 various models for the observed optical/UV variations in AGN.\n\nhttps://i
 ndico.unina.it/event/61/contributions/876/
LOCATION:Centro Congressi Federico II Aula Magna
URL:https://indico.unina.it/event/61/contributions/876/
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