Astrophysics and Space Science

, Volume 342, Issue 1, pp 147–153 | Cite as

Rms-flux relation in the optical fast variability data of BL Lacertae object S5 0716+714

  • Gabriela Raluca MocanuEmail author
  • Bulcsú Sándor
Original Article


The possibility that BL Lac S5 0716+714 exhibits a linear root mean square (rms)-flux relation in its IntraDay Variability (IDV) is analysed. The results may be used as an argument in the existing debate regarding the source of optical IDV in Active Galactic Nuclei. 63 time series in different optical bands were used. A linear rms-flux relation at a confidence level higher than 65 % was recovered for less than 8 % of the cases. We were able to check if the magnitude is log-normally distributed for eight timeseries and found, with a confidence ≥95 %, that this is not the case.


BL Lacertae objects: individual (S5 0716+714) X-Rays: rms-flux relation Optical: IDV 



GM gratefully acknowledges the support of Prof. Tiberiu Harko throughout the completion of this study and Dr. Leung Chun-Sing for providing some of the data. GM thanks the Institute for Theoretical Physics, Vienna University of Technology, Austria, for their hospitality during the time when this work was drafted. The authors are grateful to the anonymous referee for the insightful comments and suggestions that helped to bring major improvements to this work. GM is supported by the project POSDRU/107/1.5/S/76841. The work of S.B. was supported by a Research Excellence bursary of the BBU.


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Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  1. 1.Faculty of PhysicsBabes-Bolyai UniversityCluj-NapocaRomania

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