NIR flare of the QSO PKS1222+216
ATel #8444; L. Carrasco, E. Recillas, A. Porras, V. Chavushyan, D. Y. Mayya, A. Carraminana (INAOE, Mexico)
on 21 Dec 2015; 06:19 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)
Subjects: Radio, Infra-Red, Optical, Gamma Ray, AGN, Blazar, Quasar
We report on a recent NIR brightening of the QSO PKS122+216 (4C+21.35) an intermediate redshift blazar (z=0.432), associated with the Gamma-ray source 2FGLJ 1224.9+2122. On December 20th, 2015 (MJD 2457377.08) We determined the flux from this object to correspond to J = 13.287 +/- 0.05, H = 13.376 +/- 0.04 and Ks = 11.541 +/- 0.08. That is about 0.7 mag brighter than the flux value measured by our team previously. For MJD 2457221.6, we determined a flux corresponding to J = 13.685 +/- 0.07 , H = 12.847 +/- 0.07 and Ks = 12.217 +/- 0.09. Henceforth, this QSO has had a significant increase in flux by a factor of about 2 in the Ks band in this lapse. The object is brightest since
the time we started monitoring it on MJD 2455184. Our observations are carried out with the 2.1m telescope of the Guillermo Haro Observatory of the National Institute for Astrophysics, Optics and Electronics (Mexico), equipped with the instrument CANICA a NIR camera. We encourage further multi wavelength coverage of this object.
