Event-sequence time series analysis for very-high energy light curves

Ulisses Barres De Almeida, Paula M. Chadwick, Michael Daniel, Hugh Dickinson, Sam J. Nolan, Lowry McComb

Research output: Chapter in Book/Report/Conference proceedingConference contribution


A detailed analysis of the light-curves of AGNs and of some other classes of astronomical sources is essential for understanding their behaviour, since variability carries important signatures of the physical processes at work in them. In the particular case of blazars, the VHE end of the spectrum is the region where the most extreme temporal activity is observed, and its detailed characterization can be of great value if one can bypass the difficulties introduced by the low-photon statistics and extract the most information available from the data. In this paper we discuss the application of dynamic algorithms to the problem of detecting change-points in a unbinned one-dimensional event series, and discuss some of the benefits this approach can bring to the study of time variability at highenergies and ground-based gamma-ray telescopes.

Original languageEnglish (US)
Title of host publication31st International Cosmic Ray Conference, ICRC 2009
PublisherUniversity of Lodz
StatePublished - Jan 1 2009
Event31st International Cosmic Ray Conference, ICRC 2009 - Lodz, Poland
Duration: Jul 7 2009Jul 15 2009


Other31st International Cosmic Ray Conference, ICRC 2009


  • Event-sequence
  • Ground-based gamma-ray astronomy
  • Time-series analysis


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