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NIR observations of FSRQ 3C454.3 outburst

ATel #6237; V. M. Larionov (Astron. Inst. of St. Petersburg Univ. and Pulkovo Obs.), A. A. Arkharov (Pulkovo Obs. Russia), A. Di Paola (INAF-Osservatorio Astronomico di Roma, Mote Porzio, Italy)
on 16 Jun 2014; 10:00 UT
Credential Certification: V. Larionov (vlar@astro.spbu.ru)

Subjects: AGN, Blazar, Quasar

Referred to by ATel #: 6246, 6266

We perform near-infrared monitoring of selected gamma-bright blazars using 1.1-m AZT-24 telescope (Campo Imperatore, Italy), as a part of WEBT/GASP project. Our recent observations, motivated by recent multiwavelength data (see ATels#6182, #6213, #6217, #6232, #6234, #6236), confirm that FSRQ 3C454.3 substantially brightened in NIR bands during last nights, reaching J=12.88 at JD2456820.609 and J=12.17 at 2456821.570 (2014 June 12 and 13), while the quiescence level is J>15. When compared to the results of Carrasco et al., ATel#6213 (J=12.326 at JD 2456816.9487) we notice that this current outburst seem to show multiple flare structure, similar to the activity pattern observed in 2009-2010 (Jorstad et al, 2013, ApJ, 773, 147).