New Giant NIR Flare of the FSRQ S4 0954+658
ATel #16010; L. Carrasco, G. Escobedo, A. Porras, E. Recillas
on 25 Apr 2023; 23:34 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)
Subjects: Radio, Infra-Red, Optical, Gamma Ray, TeV, AGN, Blazar, Quasar
We report on a new giant 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 30th, 2023 (JD2460033.783), the object brightness corresponded to J = 11.279 +/- 0.04, H = 10.484 +/- 0.04 and Ks = 9.762 +/- 0.03. While the NIR fluxes in the JHK bands on JD 2456992.04, (see ATel #7046) when the observed fluxes were: J = 15.194 +/- 0.05, H = 14.315 +/- 0.05 and Ks = 13.472 +/- 0.03. Hence the object has increased its luminosity by a factor of more than 30 in this lapse. The object has shown flaring activity in different wavelength bands in the past. (see Atels #3220, #6709, #6996, #7001, #7007, #7046, #8445). 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.
