SIMBAD references

We present a comprehensive multiband optical monitoring and spectral analysis of the blazar OJ 287, conducted using the 1.26 m National Astronomical Observatory-Guangzhou University Infrared/Optical telescope (NGT). During an intensive 17 day observational campaign from 2022 December to 2023 January, we obtained 2716 high-quality photometric observations (929 in the g band, 887 in the r band, and 900 in the i band). The data reveal significant variability across all bands. Our main findings are as follows. (1) Significant magnitude variations were detected: Δm_g = 0.945 ± 0.048 mag (g band), Δm_r = 0.648 ± 0.023 mag (r band), and Δm_i = 0.945 ± 0.051 mag (i band). (2) Numerous intraday variability (IDV) events were identified, with characteristic parameters (Δm, ΔT, and $VR=\frac{{\rm{\Delta }}m}{{\rm{\Delta }}T}$) showing consistent patterns between the g and r bands but distinct behavior in the i band. (3) Successful modeling of intraday light curves using a multi-Gaussian function, yielding brightening (${\rm{\Delta }}{T}_{b}^{{\prime} }$) and dimming (${\rm{\Delta }}{T}_{d}^{{\prime} }$) timescales, and revealing an average peak separation of ΔTc = 42.96 ± 0.99 minutes that appears to be frequency independent. (4) Development of a novel radiation framework suggesting that the observed IDV phenomena originate from multiple components-with the frequency-independent variations attributable to the central black hole, while frequency-dependent variations stem from jet and accretion disk processes.