Resumen de Tev gamma-ray observations on nearby active galactic nuclei with the magic telescope: exploring the high energy region of the multiwavelength picture
The first three chapters of this thesis provide an introduction to the relevant physics topics discussed, starting from the basic notions and open questions about the Cosmic Rays (chapter 1), going through the achievements of the young branch of Astrophysics known as gamma-ray Astronomy (chapter 2), and focusing finally on the astrophysical objects which are the subject of this thesis: the Active Galactic Nuclei (chapter 3).
We propose then three chapters that discuss the experimental approach to the subject.
The gamma-ray detection techniques and the type of detectors are first discussed (chapter 4), paying special attention to the explanation of the IACT technique.
The MAGIC telescope(-s) (chapter 5) and its data analysis procedure (chapter 6) are then discussed in detail, since the astrophysical measurements shown on this thesis are obtained in this framework.
The next two chapters report on the physics results obtained in the course of my research.
The measurement of the VHE gamma-ray flux of three famous extragalactic sources, namely Markarian 421 and Markarian 501, in the context of the up to date most complete multiwavelength campaigns ever organized on this type of objects (chapter 7), and Messier 87 during an important flaring activity (chapter 8).
Finally, two appendices describe the most relevant technical developments to which I was committed during my PhD.
The first is the development of a novel method for the analysis of the MAGIC telescope data which makes use of the time information in the Cherenkov images (appendix A).
The second is the development of the data acquisition software for MAGIC-II (appendix B), the second telescope of the 'MAGIC Florian Goebel Telescopes' array.
