Speaker
Julian Sitarek
(University of Łódź)
Description
S3 0218+35 is a blazar located at a cosmological redshift of z=0.944.
It is gravitationally lensed by a spiral galaxy at a redshift of z=0.68.
The blazar and its lens are well studied in the radio through X-ray bands,
and several blazar outbursts were detected by Fermi-LAT at energies above
100 MeV.
Strong gravitational lensing was invoked to explain the two components
apparent in the radio and GeV light curves, separated by 10-12 days.
In July 2014 another outburst was observed by Fermi-LAT, triggering
follow-up observations with the MAGIC telescopes at energies above 100 GeV.
The observations were scheduled at the expected time of arrival of the
component delayed by the strong gravitational field of the lens, resulting
in a firm detection of S3 0218+35.
Using the combined Fermi-LAT and MAGIC data sets, we report on the spectrum
and variability of this unique blazar, the most distant among all currently
known VHE sources.
| Registration number following "ICRC2015-I/" | 500 |
|---|---|
| Collaboration | -- not specified -- |
Primary author
Julian Sitarek
(University of Łódź)
Co-authors
Antonio Stamerra
(INAF)
Daniel Mazin
(IFAE)
Dijana Dominis Prester
(University of Rijeka)
Elina Lindfors
(University of Turku)
Ievgen Vovk
(urn:Google)
Josefa Becerra Gonzalez
(IAC)
Marina Manganaro
Miguel Nievas Rosillo
(CIEMAT)
Sara Buson
(INFN)
