Laha, Sibasish and Meyer, Eileen T. and Sadaula, Dev R. and Ghosh, Ritesh and Sengupta, Dhrubojyoti and Masterson, Megan and Shuvo, Onic I. and Guainazzi, Matteo and Ricci, Claudio and Begelman, Mitchell C. and Philippov, Alexander and Mbarek, Rostom and Hankla, Amelia M. and Kara, Erin and Panessa, Francesca and Behar, Ehud and Zhang, Haocheng and Pacucci, Fabio and Pal, Main and Ricci, Federica and Villani, Ilaria and Bisogni, Susanna and La Franca, Fabio and Bianchi, Stefano and Bruni, Gabriele and Oates, Samantha and Hahn, Cameron and Nicholl, Matt and Cenko, S. Bradley and Chattopadhyay, Sabyasachi and Becerra González, Josefa and Acosta–Pulido, J. A. and Rakshit, Suvendu and Svoboda, Jiří and Gallo, Luigi and Ingram, Adam and Kakkad, Darshan (2025) Multiwavelength Observations of a Jet Launch in Real Time from the Post-changing-look Active Galaxy 1ES 1927+654. The Astrophysical Journal, 981 (2): 125. ISSN 0004-637X
Full text not available from this repository.Abstract
We present results from a high-cadence multiwavelength observational campaign of the enigmatic changing-look active galactic nucleus 1ES 1927+654 from 2022 May to 2024 April, coincident with an unprecedented radio flare (an increase in flux by a factor of ∼60 over a few months) and the emergence of a spatially resolved jet at 0.1–0.3 pc scales. Companion work has also detected a recurrent quasi-periodic oscillation (QPO) in the 2–10 keV band with an increasing frequency (1–2 mHz) over the same period. During this time, the soft X-rays (0.3–2 keV) monotonically increased by a factor of ∼8, while the UV emission remained nearly steady with