A New Giant NIR flare of Blazar PKS1244-255
ATel #12850; L. Carrasco, G. Escobedo, E. Recillas, A. Porras, V. Chavushyan (INAOE, Mexico)
on 8 Jun 2019; 03:11 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)
Subjects: Radio, Infra-Red, Optical, Gamma Ray, AGN, Blazar, Quasar, Transient
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 May 21st, 2019 (MJD 2458624.7453) its fluxes corresponded to J = 13.117 +/- 0.04, H = 12.371 +/- 0.03 and Ks = 11.565 +/- 0.04. while the fluxes previously determined by us on MJD 2458598.7821 were: J = 15.289 +/- 0.04, H = 14.630 +/- 0.03 and Ks = 13.691 +/- 0.04. Then, the source increased its flux by a factor of about 8 in this short lapse. The source has shown flaring activity in the past (see Atel#11312), and it 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.
