Another Fast NIR flare of the FSRQ GB6 J0742+5444
ATel #17718; L. Carrasco, G. Escobedo, L. Felix , A. Porras, E. Recillas;(INAOE, Mexico)
on 11 Mar 2026; 23:02 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)
Subjects: Radio, Infra-Red, Optical, Gamma Ray, AGN, Blazar, Quasar, Transient
We report on a recent NIR brightening of the flat spectrum radio quasar GB6J0742+5444, cross correlated with the gamma ray source 4FGLJ0742.6+5443. On March 6th, 2026 (JD2461105.7175) we found the object undergoing a new outburst. The NIR flux in the H band was them H = 12.983+/-0.03. This flux is almost 5 times larger than a light minimum observed in a lapse of 13 days. Since, on JD2461092.8199, the flux determined was H = 14.713+/-0.03. Recently, we had reported a previous fast flare (see ATel#17674) and a historically light maximum (see ATel#17634). Our observations are carried out with CANICA a NIR camera on the 2.1m telescope at the Observatorio Astrofisico Guillermo Haro, which is operated by the National Institute for Astrophysics, Optics and Electronics (INAOE, Mexico). We encourage further multiwavelength observations.
