Recent NIR Flare of the blazar Ton 599 (4C +29.45)
ATel #16593; L. Carrasco, G. Escobedo, A. Porras, E. Recillas, L. Felix;( INAOE, Mexico)
on 18 Apr 2024; 19:26 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)
Subjects: Radio, Infra-Red, Optical, Gamma Ray, TeV, AGN, Blazar, Quasar
Referred to by ATel #: 16629
We here report on the recent NIR brightening of the flat spectrum radio quasar Ton 599 (4C +29.45), also known as 4FGL J1159.5+2914. On March 20th, 2024 (JD2460389.8039), we found the object showing a new outburst. The NIR fluxes in the JHK bands corresponded to J=12.538+/-0.048, H=11.681+/-0.027 and Ks=10.862+/-0.064. This is a flux about 3 times brighter than the light minimum observed on JD2460372.8418, J=13.868+/-0.057, H=12.876+/-0.043 and Ks=12.062+/-0.070. Recent JHK bands photometry is listed below. JD Filter Mag 2460361.8462 J 12.533+/-0.070; 2460372.8465 J 13.868+/-0.057; 2460389.8111 J 12.538+/-0.048; 2460404.8156 J 13.568+/-0.059; 2460361.8457 H 11.714+/-0.041; 2460372.8418 H 12.876+/-0.043; 2460389.8039 H 11.681+/-0.027; 2460404.8101 H 12.663+/-0.070; 2460361.8565 Ks 10.987+/-0.059; 2460372.8578 Ks 12.062+/-0.070; 2460389.8183 Ks 10.862+/-0.064; 2460404.8199 Ks 11.702+/-0.15. Recently, the object has shown flaring activity at the optical band (ATel#16488). 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.
