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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-3177
DTSTART:20140109T203000Z
DURATION:PT1H0M0S
DTSTAMP:20260419T193659Z
LAST-MODIFIED:20131205T193245Z
LOCATION:4274 Chamberlin Hall
SUMMARY:New Results from VERITAS Long-Term Observations of Hard-Spectr
 um Blazars\, NPAC (Nuclear/Particle/Astro/Cosmo) Forum\, Arun Madhavan
  \, Iowa State
DESCRIPTION:Blazars are a class of extragalactic objects\, which produ
 ce tightly collimated relativistic jets of plasma oriented along our l
 ine of sight.  These jets contain high energy particles which\, on occ
 asion\, give rise to TeV gamma-ray emission. The VERITAS collaboration
  has conducted long-term observations of several blazar sources with e
 specially hard intrinsic gamma-ray spectra.  Gamma-ray observations of
  distant blazar sources have emerged as an effective probe of the Univ
 erse's diffuse Extragalactic Background Light (EBL)\, thanks largely t
 o characteristic spectral signatures imprinted by electron-positron pa
 ir production interactions that occur when TeV gamma-rays encounter so
 ft photons from the EBL.  I will present current results from the long
 -term blazar monitoring program in the context of EBL studies\, as wel
 l as an overview of novel techniques which I have implemented in the V
 ERITAS analysis chain to improve the instrument's reconstruction of ga
 mma-ray spectra.
URL:https://www.physics.wisc.edu/events/?id=3177
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