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A recent NIR Flare of the FSRQ S4 0954+658

ATel #10327; L. Carrasco, E. Recillas, A. Porras, V. Chavushyan, D. Y. Mayya (INAOE, Mexico)
on 28 Apr 2017; 17:00 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)

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

We report on a recent NIR flare of the intermediate redshift FSRQ S4 0954+658 (z=0.368), also known as CGRaBSJ0958+6533 associated with the gamma-ray source 2FGL0958.6+6533. Our most recent NIR photometry for this source shows that on March 17th,2017 (JD2457829.905), the object brightness corresponded to J = 13.698 +/- 0.04, H = 12.830 +/- 0.05 and Ks = 12.101 +/- 0.05. On MJD 2457817.905 the flux corresponded to H = 13.715 +/- 0.04. Hence the object has increased its luminosity by a factor of 2 in this short lapse. The object has shown flaring activity in different wavelength bands in the past. (see ATEL #3220, #6709, #6996, #7001, #7007, #7046 ). 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 strongly encourage further multiwavelength coverage.