NIR brightening of the FSRQ S4 0954+658
ATel #6996; L. Carrasco, J. Miramon, A. Porras, E. Recillas, V. Chavushyan, A. Carraminana (INAOE, Mexico)
on 27 Jan 2015; 09:26 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)
Subjects: Radio, Infra-Red, Optical, Gamma Ray, AGN, Blazar, Quasar
Referred to by ATel #: 7001, 7007, 7046, 7055, 7080, 7083, 7093, 7750, 8445, 10327, 16010
We report on a 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 recent NIR photometry for this source shows that on January 25th,2015 (JD2457047.015), the object brightness corresponded to J = 13.999 +/- 0.03, H = 13.230 +/- 0.04 and Ks = 12.402 +/- 0.02.The NIR fluxes in the JHK bands has been increasing monotonically since JD 2456992.04, when the observed fluxes were: J = 15.194 +/- 0.05, H = 14.315 +/- 0.05 and Ks = 13.472 +/- 03. Hence the object has increased its luminosity by a factor of 3 in this lapse. The object has shown flaring activity in different wavelength bands in the past. (see Atels #3220, #6709). 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.