A recent NIR Flare and maximum light of the FSRQ PKS0748+126
ATel #17207; L. Carrasco, G. Escobedo, A. Porras, E. Recillas, L. Felix;(INAOE, Mexico)
on 27 May 2025; 19:50 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)
Subjects: Radio, Infra-Red, Optical, Gamma Ray, TeV, AGN, Blazar, Quasar
We report on the recent NIR brightening of Flat Spectrum Radio Quasar PKS0748+126, also cross identified with the Gamma-ray source 4FGL J0750.8+1229. On May 11th , 2025 (JD 2460806.6998) we found the object undergoing a new outburst. At this time, its NIR fluxes in the JHK bands corresponded to J=13.440+/-0.036, H=12.674+/-0.029 and Ks=11.553+/-0.055. While, one month earlier, on JD 2460775.7179, the NIR fluxes in JHK bands were J=15.043+/-0.021, H=14.246+/-0.021 and Ks=13.172+/-0.034. Hence, the object has increased its luminosity in the JHK band by a factor of almost 4.4 in this lapse. The object is undergoing a historical light maximum from the time we started monitoring its NIR fluxes on JD2455242.83. The flux in the H band determined for it, for JD 2458199.7318 was H=16.093+/-0.040. Since then, the object has increased its luminosity in the H band by a factor of 23. On JD 2460813.6650, the object has shown a further increase in flux for the J and H bands. (J = 13.362+/-0.036, H= 12.597 +/- 0.033). 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.
