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Radio outburst of BL Lacertae

ATel #4973; C. S. Buemi, P. Leto, C. Trigilio and G. Umana (INAF, Osservatorio Astrofisico di Catania, Italy), M. Giroletti and M. Orienti (INAF, Istituto di Radioastronomia, Bologna, Italy), C. M. Raiteri and M. Villata (INAF, Osservatorio Astrofisico di Torino, Italy), U. Bach (Max-Planck-Institut fuer Radioastronomie, Bonn, Germany)
on 12 Apr 2013; 15:39 UT
Credential Certification: Claudia M. Raiteri (raiteri@oato.inaf.it)

Subjects: Radio

Referred to by ATel #: 5002

We report on extremely high radio flux of BL Lacertae at 43 and 8 GHz.

Observations at 43 GHz with the 32 m radio telescope in Noto (Italy) revealed a flux density of 10.5 +/- 0.2 Jy on 2013 April 10.65, while observations at 8 GHz with the 32 m radio telescope in Medicina (Italy) detected a flux density of 8.2 +/- 0.7 Jy on April 12.22.

These extremely high radio fluxes show that the radio activity likely correlated to the strong optical, near-infrared, and gamma-ray activity of 2011-2012 (see ATels #4028, #4031, #4155, #4271, #4277, #4349, #4565, #4600), and X-ray activity of late 2012 (ATels #4557, #4627), is far to be exhausted.

Radio monitoring of BL Lacertae at the Noto and Medicina telescopes continues.