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Galaxies 2017, 5(1), 13;

Study of the Time-Series of Microvariability in Kepler Blazar W2R 1926+42

Institute for Astrophysical Research, Boston University, Boston, MA 02215, USA
Department of Astronomy, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
Department of Physics, Tokyo Metropolitan University, Tokyo 192-0397, Japan
Department of Physics, Nihon University, Tokyo 101-8308, Japan
Author to whom correspondence should be addressed.
Received: 31 August 2016 / Revised: 20 January 2017 / Accepted: 31 January 2017 / Published: 8 February 2017
(This article belongs to the Special Issue Blazars through Sharp Multi-wavelength Eyes)
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One of the remarkable features of blazars is violent variability over a wide wavelength range. The variation mechanism causing the observed complex behavior is still under debate. The variability timescales range from less than a day to decades. Variation on timescales less than a day is known as “microvariability.” Such short-term variations can provide insights regarding the origin of the variability after they are distinguished from longer-term variational components. We select about 195 microvariability events from the continuous light curve of blazar W2R 1926+42 with 1-min time resolution obtained by the Kepler spacecraft, and estimate the timescale and amplitude of each event. The rise and decay timescales of the events reveal random variations over short timescales less than a day, but they indicate systematic variations on timescales longer than several days. This result implies that the events are not independent, but rather mutually correlated. View Full-Text
Keywords: galaxies; W2R 1926+42; Kepler; photometry; variability galaxies; W2R 1926+42; Kepler; photometry; variability

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Sasada, M.; Mineshige, S.; Yamada, S.; Negoro, H. Study of the Time-Series of Microvariability in Kepler Blazar W2R 1926+42. Galaxies 2017, 5, 13.

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