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Long-term optical variability of BL Lac objects

  • III. Optical Continuum
  • Conference paper
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BL Lac Objects

Part of the book series: Lecture Notes in Physics ((LNP,volume 334))

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Abstract

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.

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Author information

Authors and Affiliations

  1. I.S.A.S., Strada Costiera 11, I-34014, Trieste

    Ewa Szuszkiewicz

  2. Astronomical Observatory of Padova, Vicolo dell'Osservatorio, 5, I-35122, Padova

    Cesare Barbieri, Enrico Cappellaro & Massimo Turatto

  3. Department of Astronomy, University of Padova, Vicolo dell'Osservatorio, 5, 1-35122, Padova

    Cesare Barbieri & Giuliano Romano

Authors
  1. Ewa Szuszkiewicz
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  2. Cesare Barbieri
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  3. Enrico Cappellaro
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  4. Giuliano Romano
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  5. Massimo Turatto
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Editor information

L. Maraschi T. Maccacaro M. -H. Ulrich

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© 1989 Springer-Verlag

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Szuszkiewicz, E., Barbieri, C., Cappellaro, E., Romano, G., Turatto, M. (1989). Long-term optical variability of BL Lac objects. In: Maraschi, L., Maccacaro, T., Ulrich, M.H. (eds) BL Lac Objects. Lecture Notes in Physics, vol 334. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0031156

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  • DOI: https://doi.org/10.1007/BFb0031156

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-51389-6

  • Online ISBN: 978-3-540-46203-3

  • eBook Packages: Springer Book Archive

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