Since its launch in 2008, the Fermi gamma-ray satellite has greatly contributed to the discovery of misaligned AGN (MAGN) as a new class of GeV sources. In a few years, much has been learned about these objects from an observational point of view. However, one of the main problems still to be solved is the localization of the high-energy photons dissipation region. Multiwavelength studies play a key role in addressing this issue. Indeed, in some cases they have shown that gamma-ray and optical flares occur before the emission of a radio blob from the core suggesting that GeV photons are likely produced in compact regions along the jet. In this context, we started on 2012 February a simultaneous multiwavelength campaign called TANGO (Timing Analysis of Non-Blazar Gamma-ray Objects).
Our sample of MAGN has been selected from the 3CRR (northern sky) and 2 Jy (southern sky) catalogs; some sources have already a gamma-ray counterpart while other are potential gamma-ray candidates. We are collecting data from radio to gamma-rays by using facilities such as the Cassini optical telescope (Loiano), the optical/infrared REM telescope (La Silla), the Medicina radio telescope, the Swift X-ray and the Fermi gamma-ray satellites. Some objects are part of the MOJAVE experiment, and others are also TANAMI sources. When available, we also combine our results with millimetrical data from different ground-based observatories.
Preliminary results from this simultaneous multiwavelength campaign will be presented. In an effort to localize the gamma-ray emitting region(s) we will compare light curves in different wavebands seeking for simultaneous photon outbursts, a clear indication of the co-spatiality of the events. Once the outburst is revealed, we will also follow the spatial evolution of the radio structure in the high-resolution VLBI images (when available).