We calculate the cross-correlation function (CCF) for the light curves in 25-55 and 110-300 keV bands and derive the spectral lag by fitting the CCF with the Gaussian model.

• 我们计算了25-55和110-300kev能段的互相关函数(COF)，并通过高斯模型拟合CCF得到光谱时滞。