NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
Department of Physics and Department of Astronomy, University of Maryland, College Park, MD 20742, USA
Astrophysics Science Division, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
University of Maryland Baltimore County/CRESST, Baltimore, MD 21250, USA
Croatian MAGIC Consortium, Rudjer Boskovic Institute, University of Rijeka, 51000, Rijeka, Croatia
University of Zagreb, Croatia
University of Split, Croatia
Inst. de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain
Universidad de La Laguna, Dpto. Astrofísica, E-38206 La Laguna, Tenerife, Spain
ICRR, The University of Tokyo, Japan
Max-Planck-Institut für Physik, D-80805 München, Germany
Tuorla Observatory, University of Turku and Astronomy Division, Finland
Universidad Complutense, E-28040 Madrid, Spain
INAF National Institute for Astrophysics, I-00136 Rome, Italy
: Received: 12 July 2016 / Approved: 13 July 2016 / Online: 13 July 2016 (05:36:15 CEST)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
How to cite:
Sitarek, J.; Becerra González, J.; Buson, S.; Dominis Prester, D.; Manganaro, M.; Mazin, D.; Nilsson, K.; Nievas, M.; Stamerra, A.; Tavecchio, F.; Vovk, I. Broad Band Observations Of Gravitationally Lensed Blazar QSO B0218+357 During A Gamma-Ray Outburst. Preprints2016, 2016070025 (doi: 10.20944/preprints201607.0025.v1).
Sitarek, J.; Becerra González, J.; Buson, S.; Dominis Prester, D.; Manganaro, M.; Mazin, D.; Nilsson, K.; Nievas, M.; Stamerra, A.; Tavecchio, F.; Vovk, I. Broad Band Observations Of Gravitationally Lensed Blazar QSO B0218+357 During A Gamma-Ray Outburst. Preprints 2016, 2016070025 (doi: 10.20944/preprints201607.0025.v1).
QSO B0218+357 is a blazar located at a cosmological redshift of 0.944. The source is gravitationally lensed by a spiral galaxy located at the redshift of 0.68. Strong gravitational lensing splits the signals emitted by the source into two components separated by 10-12 days, as observed in radio and gamma-ray bands. In July 2014 a GeV flare was observed by Fermi-LAT, triggering follow-up observations with the MAGIC telescopes at energies above 100 GeV. The expected time delay between the components allowed us to plan broad band MWL observations before, during and after the trailing component of the emission. The MAGIC observations at the expected time of arrival of the trailing component resulted in the first detection of QSO B0218+357 in Very-High-Energy (VHE, >100 GeV) gamma rays. It is both the farthest known VHE object and one of only a few Flat Spectrum Radio Quasars detected in this energy range. We report here the observed multiwavelength spectral and temporal properties of the emission during the 2014 flare.