EPJ Web of Conferences
Volume 61, 2013The Innermost Regions of Relativistic Jets and Their Magnetic Fields
|Number of page(s)||4|
|Section||Magnetic fields and jet physics I|
|Published online||09 December 2013|
4-year optical-infrared photometric and polarimetric behaviors of a gamma-ray blazar 3C 454.3
1 Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku Kyoto Japan 606-8502,
2 Astrophysical Science Center, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima, Hiroshima Japan
3 Department of Physical Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima, Hiroshima Japan
a e-mail: firstname.lastname@example.org
Published online: 9 December 2013
We have performed a multi-color photo-polarimetric monitoring of 45 optical-bright blazars since 2007.3C 454.3, which is one of the brightest blazars in the gamma-ray sky, is one of targets of its project. We have made photo-polarimetric monitorings since July 2007. The object showed violent variation in its flux and polarization. In particular, four large-amplitude outbursts in 2007, 2008, 2009 and 2010 are remarkable. In each outburst, we observed a significant rise in the polarization degree. We calculated structure functions of the total flux and polarization from the 4-year monitoring data. In this time, we estimate the systematic and statistical errors of its structure functions. We adopt these errors when we estimate the break time-scales. The break time-scale of the total flux in 3C 454.3 is longer than that of the polarization. We also calculate the structure functions from total flux and polarization of the 15 blazars which are high-frequency monitored, and estimate the break time-scales. Most of estimated break time-scales of the total fluxes are longer than that of the polarization. From these results, it is indicated that the break time-scale of the total flux is reflected to the larger-amplitude and longer variation, like the outburst. However, the break time-scale of the polarization is related to the time-scale of the day-scale flares.
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.