Characterization of a candidate dual AGN

@article{Lena2018CharacterizationOA,
  title={Characterization of a candidate dual AGN},
  author={Davide Lena and G. Panizo-Espinar and Peter G. Jonker and Manuel A P Torres and Marianne Heida},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2018},
  volume={478},
  pages={1326-1340}
}
We present Chandra and optical observations of a candidate dual active galactic nucleus (AGN) discovered serendipitously while searching for recoiling black holes via a cross-correlation between the serendipitous XMM source catalogue (2XMMi) and SDSS-DR7 galaxies with a separation no larger than 10 times the sum of their Petrosian radii. The system has a stellar mass ratio M_1/M_2 ≈ 0.7. One of the galaxies (Source 1) shows clear evidence for AGN activity in the form of hard X-ray emission and… 

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