BVRI photometry of OQ 530

Results of VLBI and optical observations are presented for the BL Lac object OQ 530 (B1418+546), whose long-term optical variability is characterised by a decreasing mean...本文报道了BL Lac天体（BL Lac object）OQ 530（B1418+546）的甚长基线干涉测量（Very Long Baseline Interferometry, VLBI）与光学观测结果，该天体的长期光学变异性表现为平均水平下降的特征……