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Important NIR brightening of the Blazar PKS1244-255

ATel #11312; L. Carrasco, E. Recillas, A. Porras, G. Escobedo, V. Chavushyan (INAOE, Mexico)
on 16 Feb 2018; 20:15 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)

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

Referred to by ATel #: 11314

We report on NIR photometry of the flat spectrum radio source PKS1244-255, cross identified with the intermediate redshift quasar CGRaBSJ1246-2547 (z=0.633) and the Gamma-ray source 3FGL1246.7-2547, We observed the source in the NIR, finding that on January 27th, 2017 (MJD 2458145.970579) its fluxes corresponded to J = 13.895 +/- 0.03, H = 12.937 +/- 0.02 and Ks = 12.042 +/- 0.04. Hence, the flux in Ks is a factor of 3.2 times brighter than the value previously determined by us on MJD 2457830.87; Ks = 13.296 +/- 0.04. The source is brightest since the time we started monitoring it on MJD 2454857. 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.