Significant NIR brightening of the Blazar 4C+28.07
ATel #15084; L. Carrasco, G. Escobedo, A. Porras, E. Recillas, D. Mayya (INAOE, Mexico)
on 4 Dec 2021; 16:43 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)
Subjects: Infra-Red, AGN, Blazar, Quasar
We report on a new NIR flare of the high redshift QSO (z=1.213) [hb89]0234+285 also known as BZQJ0237+2848, cross-correlated with the radio source 4C+28.07 and the Gamma-ray source 3FGLJ0237.9+2848. On November 13th,2021 JD(2459531.7687), we found the source with NIR fluxes corresponding to J = 14.359 +/- 0.04, H = 13.143 +/- 0.03 and Ks= 12.275 +/- 0.06. On JD 2459132.031 the flux in the H band corresponded to H = 16.117 +/- 0.06. Hence, the source has increased its flux by a factor of 15 in this lapse. The source has shown flaring activity in the past (see ATel #10034, #11261, #12111, #12321, #12401). 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.
