We report the discovery of a bright, compact ultraviolet source at a projected separation of 1.1 kpc from the known active galactic nucleus (AGN) in Mrk 766 based on AstroSat/UVIT observations. We perform radial profile analysis and derive the UV flux almost free from the nearby contaminating sources. The new source is about 2.5 and 5.6 times fainter than the AGN in the far and near UV bands. The two sources appear as a pair of nuclei in Mrk 766. We investigate the nature of the new source based on the UV flux ratio, X-ray and optical emission. The new source is highly unlikely to be another accreting supermassive black hole in Mrk 766 as it lacks X-ray emission. We find that the UV/optical flux of the new source measured at four different bands closely follow the shape of the template spectrum of starburst galaxies. This strongly suggests that the new source is a compact star-forming region.

我们报告了根据 AstroSat/UVIT 观测结果，在 Mrk 766 中发现了一个与已知活动星系核 (AGN) 相距 1.1 kpc 的明亮、紧凑的紫外线源。我们进行径向剖面分析并推导出几乎不受附近污染源影响的紫外线通量。在远紫外波段和近紫外波段，新光源比 AGN 暗约 2.5 倍和 5.6 倍。这两个源在 Mrk 766 中显示为一对原子核。我们根据紫外线通量比、X 射线和光发射来研究新源的性质。新来源极不可能是 Mrk 766 中的另一个吸积超大质量黑洞，因为它没有 X 射线发射。我们发现在四个不同波段测量的新光源的紫外/光通量与星暴星系模板光谱的形状密切相关。