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Optical brightening of blazar B3 0650+453

ATel #3608; D. Blinov, V. Larionov (St. Petersburg Univ.), A. Arkharov (Pulkovo Observatory)
on 30 Aug 2011; 15:40 UT
Credential Certification: V. Larionov (vlar@astro.spbu.ru)

Subjects: Infra-Red, Optical, AGN, Black Hole, Blazar, Quasar

Referred to by ATel #: 3609

Following alerts in ATels#3580, #3596 we perform optical and near-infrared photometry and R-band polarimetry of FSRQ B3 0650+453 using 70-cm AZT-8 (CrAO, Ukraine) and 1.1-m AZT-24 (Campo Imperatore, Italy) telescopes. The object was found in a flaring state in optical-NIR bands. Preliminary estimates based on calibrated field stars and 2MASS magnitudes yield for Aug.27.0 UT R=16.65, I=15.98; Aug.28.0 UT V=17.33, R=16.80; Aug.29.0 UT V=17.38, R=16.85, I=16.13, J=15.20, H=14.17, K=13.24; Aug.30.0 UT V=17.44, R=16.91, I=16.21. These values are substantially brighter than R=19.8 (Healey, S. E. et al., 2008), V=21 (Veron-Cetty, M. P. and Veron, P., 2010) and J=16.68 H=15.83 K=14.73 (2MASS). Optical polarization is also high and rising along with the brightness fading: P=7%, 10%, 15% and 17% on August 27, 28, 29 and 30, respectively.