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NIR brightening of the quasar B2 2308+34

ATel #5517; L. Carrasco, E. Recillas, A. Porras, A. Carraminana (INAOE, Mexico)
on 26 Oct 2013; 04:35 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)

Subjects: Radio, Infra-Red, Optical, Gamma Ray, AGN, Quasar, Transient

Referred to by ATel #: 5564

Following the report of the renew Gamma Ray activity (Atel#5477) of the flat spectrum radio source B2 2308+34 cross identified with the high redshift QSO HB892308+341 (z=1.82) and the Fermi LAT source 2FGLJ2311.0+3425, we carried out NIR photometry of this source. Our results show a significant increase in flux in the JD2456581.865868 (Oct 16th,2013) when the flux in the H band corresponds to H =13.70 +/- 0.03 that is one magnitude brighter that the flux determined for JD2455527.736979 (H=14.705+/-0.08). Our observations were carried out with the 2.1m telescope of the Guillermo Haro Observatory operated by the National Institute for Astrophysics, Optics and Electronics (Mexico), equipped with the instrument CANICA a NIR camera. We strongly encourage further multi-wavelength coverage.