NIR brightening of the QSO 4C+50.11
ATel #6964; L. Carrasco, A. Porras, E. Recillas, J. Leon-Tavares, V. Chavushyan, A. Carraminana (INAOE, Mexico)
on 20 Jan 2015; 16:14 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)
Subjects: Radio, Infra-Red, Optical, Gamma Ray, TeV, AGN, Blazar, Quasar
We have observed a recent NIR brightening of the high redshift quasar 4C+50.11 also known as NRAO 150 (z=1.52). On January 10th, 2015, epoch JD2457032.7845, we determined the flux in the H band to be 14.665 +/- 0.05. That is 0.5 magnitudes brighter than the flux determined by the 2mass survey and has had a flux increment of factor of 1.7 since the epoch JD2457021.8552 when we found this object at a flux level corresponding to H = 15.27 +/- 0.05. The object is brightest since the time we started monitoring it on JD 2455477. 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.
