tokens: We thank the anonymous referee for their comments and suggestions that helped to improve the paper. This work was supported by CONACyT (Consejo Nacional de Ciencia y Tecnología) research grant 280789 (México). R.A.A.-A. acknowledges support from the CONACyT program for PhD studies. Data from the Steward Observatory spectropolarimetric monitoring project were used. This program is supported by Fermi Guest Investigator grants NNX08AW56G, NNX09AU10G, NNX12AO93G, and NNX15AU81G http://james.as.arizona.edu/psmith/Fermi/ . The optical and near-infrared photometry are partly based on data collected by the WEBT collaboration and stored in the WEBT archive at the Osservatorio Astrofisico di Torino—INAF ( http://www.oato.inaf.it/blazars/webt/ ); for questions regarding their availability, please contact the WEBT President Massimo Villata ( massimo.villata@inaf.it ). the 1 mm flux density light-curve data from the Submillimeter Array were provided by Mark A. Gurwell. The Submillimeter Array is a joint project between the Smithsonian Astrophysical Observatory and the Academia Sinica Institute of Astronomy and Astrophysics and is funded by the Smithsonian Institution and the Academia Sinica. The authors thank A. Porras, E. Recillas, and G. Escobedo for their help with the observations as part of the Blazar NIR Monitoring Program at OAGH. Software: IRAF (Tody 1986 , 1993 ), FTOOLS (Blackburn 1995 ), XSPEC (Arnaud 1996 ), Fermitools (v 1.0.20).
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