Optical Polarimetric and Multiwavelength Flaring Activity of Blazar 3C 279
Por:
Fraija, N., Benitez, E., Hiriart, D., Sorcia, M., Lopez, J. M., Mujica, R., Cabrera, I, J., Galvan-Gamez, A.
Publicada:
1 nov 2019
Resumen:
An exhaustive analysis of 9 yr optical R-band photopolarimetric data of
the flat-spectrum radio quasar 3C 279 from 2008 February 27 to 2017 May
25 is presented, along with multiwavelength observing campaigns
performed during the flaring activity exhibited in 2009 February/March,
2011 June, 2014 March/April, 2015 June, and 2017 February. In the R
band, this source showed the maximum brightness state of 13.68 &
xfffd;& xfffd;0.11 mag (1.36 0.20 mJy) on 2017 March 2 and the lowest
brightness state ever recorded of 18.20 & xfffd;& xfffd;0.87 mag (0.16
0.03 mJy) on 2010 June 17. During the entire period of observations, the
polarization degree varied between 0.48%& xfffd;& xfffd;0.17% and
31.65%& xfffd;& xfffd;0.77%, and the electric vector position angle
(EVPA) exhibited large rotations between 8298 & xfffd;& xfffd;092 and
44632 & xfffd;& xfffd;195. Optical polarization data show that this
source has a stable polarized component that varied from ?6% (before
the 2009 flare) to ?13% after the flare. The overall behavior of our
polarized variability data supports the scenario of jet precessions as
responsible for the observed large rotations of the EVPA. Discrete
correlation function analysis shows that the lags between gamma-rays and
X-rays compared to the optical R-band fluxes are ?t & xfffd;?&
xfffd;31 days and 1 day in 2009. Lags were also found among gamma-rays
compared with X-rays and radio of ?t & xfffd;?& xfffd;30 and 43 days
in 2011, and among radio and optical R band of ?t & xfffd;?& xfffd;10
days in 2014. A very intense flare in 2017 was observed in optical
bands, with a dramatic variation in the polarization degree (from ?6%
to 20%) in 90 days without exhibiting flaring activity in other
wavelengths.
Filiaciones:
Fraija, N.:
Univ Nacl Autonoma Mexico, Inst Astron, A Postal 70-264, Cd De Mexico 04510, Mexico
Benitez, E.:
Univ Nacl Autonoma Mexico, Inst Astron, A Postal 70-264, Cd De Mexico 04510, Mexico
Hiriart, D.:
Univ Nacl Autonoma Mexico, Inst Astron, Ensenada, Baja California, Mexico
Sorcia, M.:
Univ Nacl Autonoma Mexico, Inst Astron, A Postal 70-264, Cd De Mexico 04510, Mexico
Lopez, J. M.:
Univ Autonoma Baja California, Fac Ciencias, Campus El Sauzal, Ensenada, Baja California, Mexico
Mujica, R.:
Inst Nacl Astrofis Opt & Electr, Apdo Postal 51 & 216, Tonantzintla 72000, Puebla, Mexico
Galvan-Gamez, A.:
Univ Nacl Autonoma Mexico, Inst Astron, A Postal 70-264, Cd De Mexico 04510, Mexico
|