Gupta, Alok C.; Tripathi, Ashutosh; Wiita, Paul J.
(Monthly Notices of the Royal Astronomical Society, 2019-02)
We detected a possible quasi-periodic oscillation (QPO) of ∼71 d in the 0.1–300 GeV γ-ray Fermi-Large Area Telescope light curve of the high-redshift flat spectrum radio quasar B2 1520+31. We identify and confirm that ...