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14 papers · 1 filter
The mystery of spectral breaks: Lyman continuum absorption by photon-photon pair production in the Fermi GeV spectra of bright blazars
Boris E. Stern, Juri Poutanen
We reanalyze Fermi/LAT gamma-ray spectra of bright blazars with a higher photon statistics than in previous works and with new Pass 7 data representation. In the spectra of the bri…
MAGIC search for VHE -ray emission from AE Aquarii in a multiwavelength context
J. Aleksić, S. Ansoldi, L. A. Antonelli +152
It has been claimed that the nova-like cataclysmic variable (CV) AE Aquarii (AE Aqr) is a very-high-energy (VHE, 100 GeV) source both on observational and theoretical grounds.…
Hard X-ray emission lines from the decay of Ti-44 in the remnant of supernova 1987A
S. A. Grebenev, A. A. Lutovinov, S. S. Tsygankov +1
It is assumed that the radioactive decay of Ti-44 powers the infrared, optical and UV emission of supernova remnants after the complete decay of Co-56 and Co-57 (the isotopes that…
Black hole binary OJ287 as a testing platform for general relativity
M. J. Valtonen, A. Gopakumar, S. Mikkola +2
The blazar OJ287 is the most promising (and the only) case for an extragalactic binary black hole system inspiralling under the action of gravitational radiation reaction. At prese…
Multi-wavelength observations of blazar AO 0235+164 in the 2008-2009 flaring state
M. Ackermann, M. Ajello, J. Ballet +208
The blazar AO 0235+164 (z = 0.94) has been one of the most active objects observed by Fermi Large Area Telescope (LAT) since its launch in Summer 2008. In addition to the continuou…
MAGIC observations of the giant radio galaxy M87 in a low-emission state between 2005 and 2007
MAGIC Collaboration, J. Aleksić, E. A. Alvarez +155
We present the results of a long M87 monitoring campaign in very high energy -rays with the MAGIC-I Cherenkov telescope. We aim to model the persistent non-thermal jet emission…