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VERSION:2.0
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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20091016T000000
DTEND;TZID=Atlantic/Canary:20091016T010000
UID:iactalks-124
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/124
CREATED:2009-10-16T00:00:00+01:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Ground-based, very high energy gamma-ray astronomy, a tool for expl
 oring the ultrarelativistic Universe
DESCRIPTION:Ground-based, very high energy gamma-ray astronomy, a tool for 
 exploring the ultrarelativistic Universe\nDr. Eckart Lorenz\n\nThe window 
 of very high energy (VHE) gamma-ray astronomy was only opened 20 years ago
  by the first observation of TeV gamma-rays from the CRAB nebula. Since th
 en the field is rapidly expanding and we are approaching the first 100 VHE
  sources. In contrast to the many orders of magnitude larger flux of charg
 ed VHE Cosmic Rays, gamma-rays can be extrapolated back to their sources, 
 the high energy particle processes mostly in stellar environments and thus
  allows us to retrieve basic information about the ultra-relativistic univ
 erse. In my talk I will shortly describe the gamma-ray production mechanis
 ms related to these ultra relativistic processes, losses during the transp
 ort of gamma-rays through the universe and the detection methods. This is 
 followed by a review of classes of gamma ray emitters and the relation to 
 multi-wavelength respectively multi-messenger observations. Because of the
  very rich findings of the past years some restriction to highlight observ
 ations have to be made. The talk concludes with an outlook for the next ye
 ars including possible prospects to build the so-called North-CTA (Cherenk
 ov Telescope Array) on the Canary Islands.
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