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NIR Flaring of the Blazar 4C38.41

ATel #3238; L. Carrasco, A. Carraminana, G. Escobedo, E. Recillas, A. Porras, D. Y. Mayya. (INAOE, Mexico)
on 26 Mar 2011; 15:18 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)

Subjects: Radio, Infra-Red, Gamma Ray, >GeV, Request for Observations, AGN, Blazar, Quasar

Referred to by ATel #: 3335, 3360, 3483, 4400

We report the ongoing NIR flare of the flat spectrum radio source (4C38.41) FBQSJ163515.4+380804 a high redshift blazar (z=1.813), also known as CGRaBS J1635+3808 and identified with the Gamma Ray source 3EGJ1635+3813.In the past Fermi LAT has detected Gev flares from this object (atel #2136, atel #2456) On March 15th,2011 (JD 2455635.029352), we detected a strong NIR source coincident with the radio position. We determined the flux from this object to correspond to H = 13.072 +/- 0.05. That is 2.3 mag brighter than our previous observations on JD2455455.664637,when we determined a flux in H = 15.385 +/- 0.09. Henceforth, this QSO has had a significant increase in flux by a factor of almost 9 during the last 6 months. Observations were carried out with the 2.1m telescope of the Guillermo Haro Observatory of the National Institute for Astrophysics, Optics and Electronics (Mexico), equipped with the instrument CANICA a NIR camera. We encourage further multi wavelength coverage.