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Journal Article
1987, 4. überarb. Aufl., Kleine naturwissenschaftliche Bibliothek, ISBN 9783322003249, Volume Bd. 29, 83
Book
1967, A Series of books in astronomy and astrophysics, 235
Book
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, ISSN 0035-8711, 08/2019, Volume 487, Issue 2, pp. 1874 - 1885
Journal Article
2012, Astrophysics and space science library, ISBN 9783642275647, Volume 386
Web Resource
Monthly Notices of the Royal Astronomical Society, ISSN 0035-8711, 9/2012, Volume 425, Issue 1, pp. 556 - 576
Journal Article
Monthly Notices of the Royal Astronomical Society, ISSN 0035-8711, 05/2011, Volume 413, Issue 2, pp. 1099 - 1106
We use archival data of NASA's Chandra X-ray telescope to compile an X-ray light curve of all four images of the quadruply lensed quasar Q2237+0305 (zQ= 1.695)... 
Quasars
Journal Article
Astronomy and Astrophysics, ISSN 0004-6361, 09/2017, Volume 605, p. A105
Journal Article
Journal Article
Journal Article
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, ISSN 0035-8711, 01/2017, Volume 464, Issue 3, pp. 3431 - 3463
Journal Article
Astrophysical Journal Letters, ISSN 2041-8205, 03/2016, Volume 819, Issue 2, pp. L37 - L37
OJ 287 is a quasi-periodic quasar with roughly 12 year optical cycles. It displays prominent outbursts that are predictable in a binary black hole model. The... 
quasars: general | quasars: supermassive black holes | quasars: individual (OJ.,Q287) | Black hole physics | MASSES | black hole physics | TELESCOPE | ASTRONOMY & ASTROPHYSICS | OJ-287 | MODEL | quasars: individual (OJ 287) | OJ287 | Gravitation | Accuracy | Binary stars | Flares | Displays | Black holes (astronomy) | Mathematical models | Outbursts
Journal Article
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