D2 Article in a professional compilation book

OJ 287 in a deep X-ray-UV-optical low-state, following the April-June 2020 "super-outburst"

Authors: Komossa S., Grupe D., Kraus A., Gomez J. L., Gopakumar A., Valtonen M., Dey L., Parker M. L.

Editors: R. E. Rutledge

Publisher: R. E. Rutledge

Publication year: 2020

Book title : The Astronomer's Telegram

Series title: The Astronomer's Telegram

Number in series: 14052

Web address : http://www.astronomerstelegram.org/?read=14052