NIR follow up of the recent Gamma-ray Flare of the FSRQ OP313
ATel #16991; L. Carrasco, G. Escobedo, A. Porras, E. Recillas, L. Felix (INAOE, Mexico)
on 23 Jan 2025; 10:34 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)
Subjects: Radio, Infra-Red, Optical, Gamma Ray, AGN, Blazar, Quasar
Following the report of recent activity of the high redshift (z=0.998) FSRQ OP313,(see Atels #16970, #16977 and #16976).
We report that, on January 18th, 2025 (JD2460693.981), the object presented enhanced emission in the NIR as well. At that time the observed fluxes were: J = 12.115 +/- 0.05, H = 11.401 +/- 0.04 and Ks = 10.646 +/- 0.05. These fluxes are to be compared with the ones we have previously determined. On December 24th 2024 (JD2460669.03) the object presented the following fluxes: J = 12.997 +/- 0.05, H = 12.443 +/- 0.05 and Ks = 11.589 +/- 0.05. That is an increment in the H band by factor of 2.6 in such a rather short lapse. Further observations of the object, for the time interval between JD2460693.981 and JD2460697.022 show significant day to day flux fluctuations in the NIR, those amount up to 35% in the Ks band which is dominated by synchrotron emission. This fact, implies that the emitting zones are small probably arising from the inner parts of an accretion disk. This object is included in our NIR monitoring program of Gamma Ray bright AGNs. 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 encourage further multi wavelength coverage.