Description
We aim at investigating the time-behaviour of a sample of gamma-ray blazars. We present the results from a 13 month-long optical photometry monitoring campaign of the blazars PKS0048-097, PKS0754+100, [HB89] 0827+243, PKS0851+202, PKS1253-055, PKS1510-089, PKS1749+096, PKS2230+114 and PKS2251+158. We analyse the variability of each object, focusing on different time-scales (long term, short term, and microvariability), in an attempt to achieve a statistical comparison of the results. After applying a geometric model to explain the variability results, we found that it is possible that a slight change in the direction of the jet generates the variations detected in some objects during this campaign.
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