New Maximum NIR flare of the FSRQ HB891420+326
ATel #16040; L. Carrasco, G. Escobedo, A. Porras, E. Recillas, L. Felix; (INAOE, Mexico)
on 19 May 2023; 22:41 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)
Subjects: Radio, Infra-Red, Optical, Gamma Ray, TeV, AGN, Blazar, Quasar
We report on a New Maximum NIR flare of the intermediate redshift (z=0.682) Blazar [HB89]1420+326. We observed the source at NIR wavelengths on April fourth, 2023 (MJD 2460037.97), we found the source with NIR flux in H band corresponding to H = 11.628 +/- 0.04. On a recent report about it, ATel #16021, we found it on March 31th, 2023 (MJD 2460034.99), with J = 12.980 +/- 0.03, H = 12.149 +/- 0.03 and Ks = 11.428 +/- 0.06. The source increase by a factor of three in a three days lapse. While the NIR flux in the H band on MJD2459724.91 it was H = 16.299 +/- 0.05. Hence, the object has increased its luminosity in the H band by a factor of 74 in this lapse, during less than a year. There is an equivalence on its brightness between the supreme reached by the source four years ago, registered by our team. 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.
