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SUMMARY:Measurement of extragalactic magnetic fields by TeV gamma ray tele
 scopes
DTSTART;VALUE=DATE-TIME:20070613T090000Z
DTEND;VALUE=DATE-TIME:20070613T100000Z
DTSTAMP;VALUE=DATE-TIME:20130521T175314Z
UID:indico-event-17405@cern.ch
DESCRIPTION:1. Measurement of extragalactic magnetic fields by TeV gamma r
 ay telescopes ( 40 min + discussion) \nAfter a short discussion of differe
 nt ways of measurement of magnetic fields in the Universe\, I will explain
  \na method of measurement of extragalactic magnetic fields in observation
 s of TeV gamma-rays from distant\n blazars. Multi-TeV gamma-rays interact 
 with the infrared photon background producing secondary \nelectrons and po
 sitrons\, which can be just slightly deflected by extragalactic magnetic f
 ields before they \nemit secondary gamma-rays via inverse Compton scatteri
 ng of cosmic microwave background photons. \nSecondary gamma-rays emitted 
 toward an observer on the Earth can be detected as extended emission \naro
 und initially point source. Energy dependent angular size of extended emis
 sion is related to the value of \nextragalactic magnetic field along the l
 ine of sight. Small magnetic fields B \n\nhttp://indico.cern.ch/conference
 Display.py?confId=17405
LOCATION:CERN 1-1-025
URL:http://indico.cern.ch/conferenceDisplay.py?confId=17405
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