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NIR brightening of the Blazar HB89 0109+224

ATel #11166; L. Carrasco, E. Recillas, A. Porras, G. Escobedo, V. Chavushyan, D. Y. Mayya (INAOE, Mexico)
on 15 Jan 2018; 03:30 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)

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

We report on the NIR brightening of the low redshift QSO HB89 0109+224 (z=0.261). On November 13th, 2017 MJD(24578070.8843), we found the source with NIR fluxes J = 12.266+/- 0.05, H = 11.524 +/- 0.05 and Ks = 10.627 +/- 0.06 While, on MJD 2457807 the flux in the H band corresponded to H = 12.379 +/- 0.05. Hence, the source has increased its flux by a factor of 2.2 in this lapse. The source is brightest since the time we started monitoring it (MJD 2455607.62), when the flux in the H band was H = 12.117 +/- 0.04. Our observations are 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 encourage further multi wavelength coverage.