Preprint Article Version 1 This version not peer reviewed

Broad Band Observations Of Gravitationally Lensed Blazar QSO B0218+357 During A Gamma-Ray Outburst

Version 1 : Received: 12 July 2016 / Approved: 13 July 2016 / Online: 13 July 2016 (05:36:15 CEST)

A peer-reviewed article of this Preprint also exists.

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 during a Gamma-Ray Outburst. Galaxies 2016, 4, 31. 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 during a Gamma-Ray Outburst. Galaxies 2016, 4, 31.

Journal reference: Galaxies 2016, 4, 31
DOI: 10.3390/galaxies4040031

Abstract

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.

Subject Areas

Gamma rays: galaxies; Gravitational lensing: strong; Galaxies: jets; Radiation mechanisms: non-thermal; Galaxies: individual: QSO B0218+357

Readers' Comments and Ratings (0)

Leave a public comment
Send a private comment to the author(s)
Rate this article
Views 0
Downloads 0
Comments 0
Metrics 0
Leave a public comment

×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.