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NIR photometry of the Radio Source GB6 J0713+5738

ATel #11331; L. Carrasco, A. Lopez, E. Recillas, A. Porras, V. Chavushyan (INAOE, Mexico)
on 22 Feb 2018; 06:15 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)

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

Referred to by ATel #: 11335

We report on NIR photometry of the radio source GB6J0713+5738, tentatively identified with the Gamma-ray source Fermi J0713+5739 (ATels #10149, #11056). On January 22nd, 2018, we observed a source coincident with the radio source coordinates, finding that on MJD2458140.8592, its fluxes corresponded to J = 16.448 +/- 0.07, H = 15.865 +/- 0.02 and Ks = 14.931 +/- 0.05. Those NIR colors are typical of blazars. Furthermore, the source was not detected in the 2mass NIR survey, this fact implies that at the time of the survey the source had H > 17.5. Hence, this source has increased its NIR flux by a factor of about 10 in this lapse and it is presently undergoing an important NIR flare event. This activity strongly suggests that the counterpart of the source Fermi J0713+5739 is indeed the radio source GB6J0713+5738. 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.