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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20151201T123000
DTEND;TZID=Atlantic/Canary:20151201T133000
UID:iactalks-851
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/851
CREATED:2015-12-01T12:30:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Gamma rays from the Universe’s middle age: pushing Very High Ener
 gy Astrophysics boundaries with MAGIC 
DESCRIPTION:Gamma rays from the Universe’s middle age: pushing Very High 
 Energy Astrophysics boundaries with MAGIC \nDr. Marina Manganaro\n\nThe se
 arch for detection of gamma-rays in the very-high-energy range (VHE, >1
 00GeV) from distant AGNs by Imaging Atmospheric Cherenkov Telescopes (IACT
 s) gets very complicated at high redshifts, not only because of the lower 
 flux due to the distance of the source, but also due to the consequent abs
 orption of gamma-rays by the extragalactic background light (EBL), affecti
 ng VHE sources at z~0.1 and beyond. The farthest source ever detected in t
 he VHE domain was the blazar PKS1424+240, at redshift z>0.6. In the las
 t months MAGIC, a system of two 17 m of diameter IACTs located in the Cana
 ry island of La Palma, has been able to go beyond that limit and to push t
 he boundaries for VHE detection to redshifts z~1. The two sources detected
  and analyzed, blazar S30218+35 (Atel discovery #6349) and FSRQ PKS1441+25
  (Atel discovery #7416) are located at redshift z=0.944 and z=0.939 respec
 tively. S30218+35 is also the first gravitational lensed blazar ever detec
 ted in VHE. The multiwavelength dataset collected allowed us to test for t
 he first time the present generation of EBL models at such distances. I wi
 ll show results on MAGIC analysis on S30218+35 and PKS1441-25, including s
 pectral energy distributions and EBL absorption studies, in a multi-wavele
 ngth context.
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