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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20111004T000000
DTEND;TZID=Atlantic/Canary:20111004T010000
UID:iactalks-307
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/307
CREATED:2011-10-04T00:00:00+01:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Discerning the location of the gamma-ray emission region in AGN bla
 zars from multi-messenger and multi-spectral-range observations 
DESCRIPTION:Discerning the location of the gamma-ray emission region in AGN
  blazars from multi-messenger and multi-spectral-range observations \nDr. 
 Ivan Agudo\n\nRelativistic jets in AGN in general, and in blazars in parti
 cular, are  the most energetic and among the most powerful astrophysical o
 bjects  known so far. Their relativistic nature provides them the ability 
 to  emit profusely in all spectral ranges from radio wavelengths to  gamma
 -rays, as well as abrupt variability in all time scales (from hours  to ye
 ars). Since the birth of gamma-ray astronomy, locating the origin  of gamm
 a-ray emission has been a fundamental problem for the knowledge  of the em
 ission processes involved. Deep and densely time sampled  monitoring progr
 ams with the Fermi Gamma-ray Space Telescope and several  other facilities
  at most of the available spectral ranges (including  polarization measure
 ments where possible) are starting to shed light for  the case of blazars.
  After a short review of the status of the problem,  some of the latest re
 sults locating the GeV emission in the jets of  some blazars, at >10 pa
 rsec from the central AGN engine, will be  presented together with their i
 mplications about the gamma-ray emission  mechanisms involved
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