A fast NIR flare and Historical NIR light maximum of the FSRQ PKS0748+126
ATel #17729; L. Carrasco, R. Gonzalez, G. Escobedo, L. Felix , A. Porras, E. Recillas;(INAOE, Mexico)
on 27 Mar 2026; 02:45 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)
Subjects: Radio, Infra-Red, Gamma Ray, AGN, Blazar, Quasar
We report on the recent NIR brightening of the flat spectrum radio quasar PKS0748+126, cross identified with the gamma-ray source 4FGL J0750.8+1229. On March 25th, 2026 (JD 2461124.8284) we found the object undergoing a historically bright NIR flare for the lapse of 16 years covered by our observations. This maximum light was reached in a short lapse of 19 days. On this date, the NIR fluxes in the JHK bands were: J=12.656+/-0.047, H=12.049+/-0.025 and Ks=11.322+/-0.039, respectively. These fluxes have doubled their values with respect to our previous determination for them. Since, on JD2461105.7449 the NIR fluxes in those bands were: J=13.819+/-0.039, H=13.006+/-0.036 and Ks=12.109+/-0.022. Furthermore, NIR flux in the H band on JD 2458199.7319 had been H=16.093+/-0.04. Hence, the object has increased its luminosity in the H band by a factor above of 40 in this 8 year time window. Our observations are carried out with CANICA a NIR camera on the 2.1m telescope at the Observatorio Astrofisico Guillermo Haro, operated by the National Institute for Astrophysics, Optics and Electronics (INAOE, Mexico). We encourage further multiwavelength observations.
