We propose a set of eleven faint UV white dwarf stars as potential UV standards for the UVIT filter system on-board AstroSat mission. Synthetic photometry of these stars has been carried out using the in-orbit filter curves of UVIT, GALEX, UVOT and model spectra in the literature. The synthetic photometry of GALEX and UVOT is well correlated with their respective observations. The synthetic UVIT photometry is found to be strongly correlated with that of GALEX. The UV extinction \(A_\lambda \) for these stars has been computed using CCM-89 extinction model and its value for the \(\lambda _{\mathrm{mean}}\) of each UVIT filter band has been listed. These results motivate us to recommend this set of stars as additional UVIT flux calibrators.

我们提出了一组 11 颗微弱的紫外线白矮星，作为 AstroSat 任务上 UVIT 过滤系统的潜在紫外线标准。这些恒星的合成光度测量是使用 UVIT、GALEX、UVOT 和文献中的模型光谱的在轨滤波器曲线进行的。GALEX 和 UVOT 的合成光度与它们各自的观察结果密切相关。合成 UVIT 光度测定被发现与 GALEX 的光度测定密切相关。这些恒星的紫外消光\(A_\lambda \)已经使用CCM-89 消光模型计算出来，并且每个UVIT 滤光带的\(\lambda _{\mathrm{mean}}\)值已经列出。这些结果促使我们推荐这组恒星作为额外的 UVIT 通量校准器。