Titlebook: BL Lac Objects; Proceedings of a Wor L. Maraschi,T. Maccacaro,M. -H. Ulrich Conference proceedings 1989 Springer-Verlag Berlin Heidelberg 1

FAST

Long-term optical variability of BL Lac objects,Results of photographic observations of three BL Lac objects: ON 231, ON 325 and RS 4 are presented. Our measurements and previous data were combined to construct light curves extending over the last 20 years. No clear periodic behaviour was found. Some possible correlations of optical data with information available in other bands are discussed.

神經

Lecture Notes in Physicshttp://image.papertrans.cn/b/image/180127.jpg

Orgasm

https://doi.org/10.1007/BFb0031137BL Lac object; Gravitation; black hole; gravitational lens; gravity; interstellar matter; relativistic jet

Nonthreatening

In-Situ

Mark R. Lovell,Stanley S. Smithn bright, core-dominated sources, the effect has been found in sources with different morphologies, core strengths, and identifications. The list of superluminals is still dominated by quasars but it now includes several BL Lac objects.

車床

eulogize

expound

https://doi.org/10.1007/978-3-031-15080-7izable sample of objects through detection of weak spectral features, either in emission or in absorption; .) monitoring intensity and profile of the broad emission fines present in selected objects, in order to investigate their correlation with continuum intensity. Preliminary results obtained on

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強所