Important NIR brightening of the Blazar HB890646-176
ATel #12376; L. Carrasco, G. Escobedo, E. Recillas, A. Porras, V. Chavushyan (INAOE, Mexico)
on 10 Jan 2019; 21:25 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)
Subjects: Radio, Infra-Red, Optical, AGN, Blazar, Quasar
We report on NIR brightening of the high redshift (z=1.232) Blazar [hb89]0646-176, also known as BZQJ0648-1744, cross-correlated with the radio source TXS0646-176 and the Gamma-ray source 1FGLJ0648.7-1740. On January 4th,2019 MJD(2458487.875), we found the source with NIR fluxes corresponding to J = 15.899+/- 0.04, H = 14.761 +/- 0.04 and Ks= 13.830 +/- 0.05. On MJD 2457377.86 the flux in the H band corresponded to H = 15.134 +/- 0.05. Hence, the source has increased its flux by a factor of 2.5, in this lapse. The source is brightest since the time of the 2Mass sky survey, when the source was H > 18 mag. 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.
