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NIR Flare of radio source GB60713+5738

ATel #11335; L. Carrasco, A. Porras, E. Recillas, V. Chavushyan (INAOE, Mexico)
on 22 Feb 2018; 16:15 UT
Distributed as an Instant Email Notice Transients
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)

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

In ATel#11331, we reported the NIR detection of the radio source GB60713+5738 and the suggestion of it being in flaring state. However, we found a previous observation in our archive that fully confirms a recent giant flare of this object. On December 29th, 2017 (MJD2458116.972963), we observed the source with NIR fluxes J = 15.642 +/- 0.04, H = 14.807 +/- 0.02, Ks = 14.931 +/- 0.05. In January 22nd,2018, the source had declined to our flux values reported on ATel#11331, ie. the source had fainted by a factor of 3 in one month. This fact is consistent with the renew gamma-ray activity of Fermi J0713+5739 (ATel#11056) and provides further evidence for the radio and the NIR sources being the counterparts of the gamma-ray one. 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.