NIR brightening of the Blazar HB89 1749+701
ATel #8245; L. Carrasco, A. Porras, E. Recillas, V. Chavushyan, A. Carraminana (INAOE, Mexico)
on 4 Nov 2015; 17:58 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)
Subjects: Radio, Infra-Red, Optical, Gamma Ray, AGN, Blazar, Quasar
We report on the recent NIR brightening of the high redshift Quasar HB89 1749+701 (z=0.77), cross identified with the gamma-ray source 2FGLJ1748.8+7006. On October 1st, 2015 (MJD 2457296.633), we found the source with the following fluxes in the NIR bands: J = 13.538+/- 0.03, H = 12.813 +/- 0.04 and Ks = 12.027 +/- 0.04. This is to be compared with our previous observation on MJD 2469342, when the source flux corresponded to H = 13.395 +/- 0.05. Hence the source has had a flux increment of a factor of 1,7 in this lapse. The source is brightest in the NIR, since the observations reported by the 2MASS survey. This source has shown flaring activity in Gamma rays as detected by Agile in Atel # 3199. 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 strongly encourage further multiwavelength coverage.
