TESS-GAIA Light Curve (TGLC)

TESS-Gaia Light Curve (TGLC) is a PSF-based TESS full-frame image (FFI) light curve product. Using Gaia DR3 as priors, the team forward models the FFIs with the effective point spread function to remove contamination from nearby stars. The resulting light curves show a photometric precision closely tracking the pre-launch prediction of the noise level: TGLC's photometric precision consistently reaches ≲2% at 16th TESS magnitude even in crowded fields, demonstrating excellent decontamination and deblending power.TESS-Gaia 光变曲线（TGLC）是一款基于点扩散函数（Point Spread Function, PSF）的TESS全帧图像（Full-Frame Image, FFI）光变曲线产品。研究团队以盖亚第三数据发布版（Gaia DR3）为先验信息，采用有效点扩散函数对全帧图像进行正向建模，以消除邻近恒星带来的测光污染。所得到的光变曲线的测光精度与任务发射前的噪声水平预测高度吻合：即便在恒星拥挤的天区，TGLC在TESS 16星等下仍能稳定达到≲2%的测光精度，展现出优异的消污染与源分离能力。