We present six new time-delay measurements obtained from $R_c$-band
monitoring data acquired at the Max Planck Institute for Astrophysics (MPIA)
2.2 m telescope at La Silla observatory between October 2016 and February 2020.
The lensed quasars HE 0047-1756, WG 0214-2105, DES 0407-5006, 2M 1134-2103, PSJ
1606-2333 and DES 2325-5229 were observed almost daily at high signal-to-noise
ratio to obtain high-quality light curves where we can record fast and
small-amplitude variations of the quasars. We measured time delays between all
pairs of multiple images with only one or two seasons of monitoring with the
exception of the time delays relative to image D of PSJ 1606-2333. The most
precise estimate was obtained for the delay between image A and image B of DES
0407-5006, where $\tau_{AB} = -128.4^{+3.5}_{-3.8}$ d (2.8% precision)
including systematics due to extrinsic variability in the light curves. For HE
0047-1756, we combined our high-cadence data with measurements from decade-long
light curves from previous COSMOGRAIL campaigns, and reach a precision of 0.9 d
on the final measurement. The present work demonstrates the feasibility of
measuring time delays in lensed quasars in only one or two seasons, provided
high signal-to-noise ratio data are obtained at a cadence close to daily.

本研究利用最近一次从 2016 年 10 月至 2020 年 2 月期间在智利拉西利亚天文台进行的天文监测数据，对 6 个透镜类星体的时间延迟进行了精确测量，并证明了只需一至两个季度的高信噪比数据，就能精确测量透镜类星体的时间延迟。