Speaker
Josefa Becerra Gonzalez
(NASA GSFC)
Description
The high-frequency-peaked BL Lac object Markarian 501 is a very high energy (VHE, E>100 GeV) emitter located in our extragalactic neighborhood (z=0.034). The source can be detected in the VHE band during low state, what makes this target an ideal source for long-term multi-wavelength studies covering the entire electromagnetic spectrum. During a multi-wavelength campaign in 2014, the source showed the highest X-ray activity observed by Swift-XRT during the last decade. The source displayed very hard spectra at X-rays and gamma-ray energies with variability on day timescales. The distortion of the broadband SED strongly suggests the existence of, at the very least, an extra component with ultra-energetic and relatively narrow electron energy distribution, which had never been seen before for Mrk501. In the conference I will report about this unprecedented flaring event and its physical implications.
| Collaboration | on behalf of the MAGIC and Fermi-LAT collaboration |
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Author
Josefa Becerra Gonzalez
(NASA GSFC)
Co-authors
David Paneque Camarero
(Instituto de Fisica de Altas Energias (IFAE))
Fabrizio Tavecchio
(INAF)
Kazuma Ishio
(MPI)
Koji Noda
(Max-Planck-Institute for Physics)
Matteo Perri
(ASI Science Data Center)
