Intraday Optical Multiband Observation of BL Lacertae
Authors: Yue Fang, Yan Zhang, Qihang Chen, and Jianghua Wu
2022 The Astrophysical Journal92691.
Provider: AAS Journals
Caption: Figure 1.
Finding chart of BL Lac in the R band. The labels “T” and “1–4” represent BL Lac, the comparison star, the check star, and two field stars, respectively.