A recent NIR flare of the blazar FSRQ S40954+65
ATel #17044; L. Carrasco, G. Escobedo, A. Porras, E. Recillas, L. Felix (INAOE, Mexico)
on 19 Feb 2025; 19:05 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)
Subjects: Radio, Infra-Red, Gamma Ray, AGN, Blazar, Quasar
Referred to by ATel #: 17062
We report on recent NIR activity of the Blazar FSRQ S40954+65 (z=0.367),(see Atel#17042). On February 5th, 2025 (JD2460711.9824) the observed fluxes were: J = 12.581 +/- 0.04, H = 11.813 +/- 0.04 and Ks = 11.206 +/- 0.03. While, on December 10th 2024 (JD2460655.0369) the object presented the following fluxes: J = 13.982 +/- 0.04, H = 13.300 +/- 0.05 and Ks = 12.113 +/- 0.02. That is an increment in the H band by factor of 3.9 in such a rather short lapse. Further observations (JD2460715.8579) of the object show a decrement in flux in the J and H bands while a brightening in the K band was detected, the fluxes then were: J = 12.733 +/- 0.04, H = 11.891 +/- 0.05 and Ks = 10.953 +/- 0.05. That is an increment of 25% in Ks in a very short lapse. This fact, implies that the emitting zones are small probably arising from the inner parts of an accretion disk. This object is included in our NIR monitoring program of Gamma Ray bright active galactic nuclei. 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.
