Results 181 to 190 of about 6,380 (236)

Optical evidence for the unification of active galactic nuclei and quasi-stellar objects. [PDF]

Proc Natl Acad Sci U S A, 1995
Miller JS.
europepmc   +1 more source

Narrow-line Seyfert 1 galaxies at hard X-rays★ [PDF]

, 2011
F. Panessa, Alessandra De Rosa, L. Bassani, A. Bazzano, A. J. Bird, R. Landi, A. Malizia, G. Miniutti, M. Molina, P. Ubertini   +9 more
openalex   +1 more source

Revelations in our own backyard: Chandra's unique Galactic Center discoveries. [PDF]

Proc Natl Acad Sci U S A, 2010
Markoff S.
europepmc   +1 more source

X-Rays from the Location of the Double-humped Transient ASASSN-15lh. [PDF]

Astrophys J, 2017
Margutti R, Metzger BD, Chornock R, Milisavljevic D, Berger E, Blanchard PK, Guidorzi C, Migliori G, Kamble A, Lunnan R, Nicholl M, Coppejans DL, Dall'Osso S, Drout MR, Perna R, Sbarufatti B.   +15 more
europepmc   +1 more source

Structure of photodissociation fronts in star-forming regions revealed by observations of high-J CO emission lines with Herschel. [PDF]

Astron Astrophys, 2018
Joblin C, Bron E, Pinto C, Pilleri P, Le Petit F, Gerin M, Le Bourlot J, Fuente A, Berne O, Goicoechea JR, Habart E, Köhler M, Teyssier D, Nagy Z, Montillaud J, Vastel C, Cernicharo J, Röllig M, Ossenkopf-Okada V, Bergin EA.   +19 more
europepmc   +1 more source

Astrophysical symmetries. [PDF]

Proc Natl Acad Sci U S A, 1996
Trimble V.
europepmc   +1 more source

The case for unification. [PDF]

Proc Natl Acad Sci U S A, 1995
Gopal-Krishna.
europepmc   +1 more source

Observational model of the ionized gas in Seyfert and radio-galaxy nuclei. [PDF]

Proc Natl Acad Sci U S A, 1978
Osterbrock DE.
europepmc   +1 more source

A case for a binary black hole system revealed via quasi-periodic outflows. [PDF]

Sci Adv
Pasham DR, Tombesi F, Suková P, Zajaček M, Rakshit S, Coughlin E, Kosec P, Karas V, Masterson M, Mummery A, Holoien TW, Guolo M, Hinkle J, Ripperda B, Witzany V, Shappee B, Kara E, Horesh A, van Velzen S, Sfaradi I, Kaplan D, Burger N, Murphy T, Remillard R, Steiner JF, Wevers T, Arcodia R, Buchner J, Merloni A, Malyali A, Fabian A, Fausnaugh M, Daylan T, Altamirano D, Payne A, Ferraraa EC.   +35 more
europepmc   +1 more source

Difficulties with unification. [PDF]

Proc Natl Acad Sci U S A, 1995
Singal AK.
europepmc   +1 more source