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astro-ph.HE2024★ 1 cited
The calm before the (next) storm: no third outburst in 2019--2020, and ongoing monitoring of the transient AGN IC 3599
Dirk Grupe, S. Komossa, Salem Wolsing
We report on follow-up observations of the Seyfert 1.9 galaxy IC 3599 with the NASA Neil Gehrels Swift mission. The detection of a second X-ray outburst in 2010 by Swift after the…
astro-ph.HE2021
Promise of persistent multi-messenger astronomy with the blazar OJ 287
Mauri J. Valtonen, Lankeswar Dey, A. Gopakumar +7
Successful observations of the seven predicted bremsstrahlung flares from the unique bright blazar OJ 287 firmly point to the presence of a nanohertz gravitational wave (GW) emitti…