Kollatschny, W.; Grupe, D.; Parker, M.L.; Ochmann, M.W.; Schartel, N.; Herwig, E.; Komossa, S.; Romero-Colmenero, E.; Santos-Lleo, M.: Optical and X-ray discovery of the changing-look AGN IRAS 23226-3843 showing extremely broad and double-peaked Balmer profiles. åp 638, A91, S. A91 (2020)

Komossa, S.; Grupe, D.: Multiple flares during the April-June 2020 outburst of the blazar OJ 287. The Astronomer's Telegram 13785, S. 1 (2020)

Komossa, S.; Grupe, D.; Gallo, L.C.; Poulos, P.; Blue, D.; Kara, E.; Kriss, G.; Longinotti, A.L.; Parker, M.L.; Wilkins, D.: Lifting the curtain: The Seyfert galaxy Mrk 335 emerges from deep low-state in a sequence of rapid flare events. åp 643, L7, S. L7 (2020)

Komossa, S.; Grupe, D.; Gomez, J.L.: Detection of a bright UV - X-ray flare of the blazar OJ 287 with Swift. The Astronomer's Telegram 13658, S. 1 (2020)

Komossa, S.; Grupe, D.; Kraus, A.; Gomez, J.L.; Gopakumar, A.; Valtonen, M.; Dey, L.; Parker, M.L.: OJ 287 in a deep X-ray-UV-optical low-state, following the April-June 2020 "super-outburst''. The Astronomer's Telegram 14052, S. 1 (2020)

Komossa, S.; Grupe, D.; Parker, M.L.; Valtonen, M.J.; Gómez, J.L.; Gopakumar, A.; Dey, L.: The 2020 April-June super-outburst of OJ 287 and its long-term multiwavelength light curve with Swift: binary supermassive black hole and jet activity. \mnras 498 (1), S. L35 - L39 (2020)

Komossa, S.; Kraus, A.; Grupe, D.; Dey, L.; Gomez, J.L.; Gopakumar, A.; Parker, M.; Valtonen, M.: Effelsberg and Swift observations of the blazar OJ 287 in outburst: detection of a radio flare. The Astronomer's Telegram 13702, S. 1 (2020)

Koribalski, B. S.; Staveley-Smith, L.; Westmeier, T.; Serra, P.; Spekkens, K.; Wong, O.I.; Lee-Waddell, K.; Lagos, C.D.P.; Obreschkow, D.; Ryan-Weber, E.V. et al.; Zwaan, M.; Kilborn, V.; Bekiaris, G.; Bekki, K.; Bigiel, F.; Boselli, A.; Bosma, A.; Catinella, B.; Chauhan, G.; Cluver, M.E.; Colless, M.; Courtois, H.M.; Crain, R.A.; de Blok, W.J.G.; Dénes, H.; Duffy, A.R.; Elagali, A.; Fluke, C.J.; For, B.-Q.; Heald, G.; Henning, P.A.; Hess, K.M.; Holwerda, B.W.; Howlett, C.; Jarrett, T.; Jones, D.H.; Jones, M.G.; Józsa, G.I.G.; Jurek, R.; Jütte, E.; Kamphuis, P.; Karachentsev, I.; Kerp, J.; Kleiner, D.; Kraan-Korteweg, R.C.; López-Sánchez, Á.R.; Madrid, J.; Meyer, M.; Mould, J.; Murugeshan, C.; Norris, R.P.; Oh, S.-H.; Oosterloo, T.A.; Popping, A.; Putman, M.; Reynolds, T.; Rhee, J.; Robotham, A.S.G.; Ryder, S.; Schröder, A.C.; Shao, L.; Stevens, A.R.H.; Taylor, E.N.; van der Hulst, J.M.; Verdes-Montenegro, L.; Wakker, B.P.; Wang, J.; Whiting, M.; Winkel, B.; Wolf, C.: WALLABY - an SKA Pathfinder HI survey. \apss 365 (7), 118, S. 118 (2020)

Kothes, R.; Reich, W.; Safi-Harb, S.; Guest, B.; Reich, P.; Fürst, E.: A radio continuum and polarization study of the pulsar wind nebula CTB 87 (G74.9+1.2). \mnras 496 (1), S. 723 - 738 (2020)

Kovalev, Y. A.; Kardashev, N.S.; Kovalev, Y.Y.; Sokolovsky, K.V.; Voitsik, P.A.; Edwards, P.G.; Popkov, A.V.; Zhekanis, G.V.; Sotnikova, Y. V.; Nizhelsky, N.A. et al.; Tsybulev, P.G.; Erkenov, A.K.; Bursov, N.N.: RATAN-600 and RadioAstron reveal the neutrino-associated blazar TXS 0506+056 as a typical variable AGN. Advances in Space Research 65 (2), S. 745 - 755 (2020)

Kovalev, Y.Y.; Kardashev, N.S.; Sokolovsky, K.V.; Voitsik, P.A.; An, T.; Anderson, J.M.; Andrianov, A.S.; Avdeev, V.Y.; Bartel, N.; Bignall, H.E. et al.; Burgin, M.S.; Edwards, P.G.; Ellingsen, S.P.; Frey, S.; García-Miró, C.; Gawroński, M.P.; Ghigo, F.D.; Ghosh, T.; Giovannini, G.; Girin, I.A.; Giroletti, M.; Gurvits, L.I.; Jauncey, D.L.; Horiuchi, S.; Ivanov, D.V.; Kharinov, M.A.; Koay, J.Y.; Kostenko, V.I.; Kovalenko, A.V.; Kovalev, Y.A.; Kravchenko, E.V.; Kunert-Bajraszewska, M.; Kutkin, A.M.; Likhachev, S.F.; Lisakov, M.M.; Litovchenko, I.D.; McCallum, J.N.; Melis, A.; Melnikov, A.E.; Migoni, C.; Nair, D.G.; Pashchenko, I.N.; Phillips, C.J.; Polatidis, A.; Pushkarev, A.B.; Quick, J.F.H.; Rakhimov, I.A.; Reynolds, C.; Rizzo, J.R.; Rudnitskiy, A.G.; Savolainen, T.; Shakhvorostova, N.N.; Shatskaya, M.V.; Shen, Z.-Q.; Shchurov, M.A.; Vermeulen, R.C.; de Vicente, P.; Wolak, P.; Zensus, J.A.; Zuga, V.A.: Detection statistics of the RadioAstron AGN survey. Advances in Space Research 65 (2), S. 705 - 711 (2020)

Kovalev, Y.Y.; Pushkarev, A.B.; Nokhrina, E.E.; Plavin, A.V.; Beskin, V.S.; Chernoglazov, A.V.; Lister, M.L.; Savolainen, T.: A transition from parabolic to conical shape as a common effect in nearby AGN jets. \mnras 495 (4), S. 3576 - 3591 (2020)

Kovalev, Y.A.; Sotnikova, Y.V.; Erkenov, A.K.; Kovalev, Y.Y.; Plavin, A.V.; Troitsky, S.V.: The RATAN-600 2-22 GHz continuum spectrum of the neutrino association quasar TXS 1100+122 is slightly rising. The Astronomer's Telegram 13405, S. 1 (2020)

Kovalev, Y.Y.; Troitsky, S.V.; Kovalev, Y.A.; Plavin, A.V.: Flat spectrum radio quasar TXS 1100+122 has a bright VLBI-compact core - as expected for neutrino candidate sources. The Astronomer's Telegram 13397, S. 1 (2020)

Kovalev, Y.Y.; Zobnina, D.I.; Plavin, A.V.; Blinov, D.: Optical polarization properties of AGNs with significant VLBI-Gaia offsets. \mnras 493 (1), S. L54 - L58 (2020)

Kramer, C.; Nikola, T.; Anderl, S.; Bertoldi, F.; Boquien, M.; Braine, J.; Buchbender, C.; Combes, F.; Henkel, C.; Hermelo, I. et al.; Israel, F.; Relaño, M.; Röllig, M.; Schuster, K.; Tabatabaei, F.; van der Tak, F.; Verley, S.; van der Werf, P.; Wiedner, M.; Xilouris, E. M.: Gas and dust cooling along the major axis of M 33 (HerM33es). Herschel/PACS [C II] and [O I] observations. åp 639, A61, S. A61 (2020)

Krause, M.: Gigantische Magnetfeldschleifen. Sterne und Weltraum 8, S. 22 - 24 (2020)

Krause, M.; Irwin, J.; Schmidt, P.; Stein, Y.; Miskolczi, A.; Mora-Partiarroyo, S. C.; Wiegert, T.; Beck, R.; Stil, J. M.; Heald, G. et al.; Li, J.-T.; Damas-Segovia, A.; Vargas, C. J.; Rand, R. J.; West, J.; Walterbos, R. A.M.; Dettmar, R.-J.; English, J.; Woodfinden, A.: CHANG-ES. XXII. Coherent magnetic fields in the halos of spiral galaxies. åp 639, A112, S. A112 (2020)

Kravchenko, E.V.; Gómez, J.L.; Kovalev, Y.Y.; Lobanov, A.P.; Savolainen, T.; Bruni, G.; Fuentes, A.; Anderson, J.M.; Jorstad, S.G.; Marscher, A.P. et al.; Tornikoski, M.; Lähteenmäki, A.; Lisakov, M.M.: Probing the Innermost Regions of AGN Jets and Their Magnetic Fields with RadioAstron. III. Blazar S5 0716+71 at Microarcsecond Resolution. \apj 893 (1), 68, S. 68 (2020)

Kravchenko, E. V.; Gómez, J. L.; Kovalev, Y. Y.; Voitsik, P. A.: The jet of S5 0716 + 71 at μ as scales with RadioAstron. Advances in Space Research 65 (2), S. 720 - 724 (2020)