If you are using ULLYSES data in a published work, please cite the following paper:
Ultraviolet Legacy Library of Young Stars as Essential Standards (ULLYSES): Data Release I, Roman-Duval, J. et al. 2020
If you are are discussing the close companions of T Tauri stars CVSO 109 and CVSO 165, please cite the following paper:
Close Companions to the T Tauri Stars CVSO 109 and CVSO 165 Observed by the HST ULLYSES Program, Proffitt, C. et al. 2021
Also please include the following acknowledgement in all publications that make use of ULLYSES data:
Based on observations obtained with the NASA/ESA Hubble Space Telescope, retrieved from the Mikulski Archive for Space Telescopes (MAST) at the Space Telescope Science Institute (STScI). STScI is operated by the Association of Universities for Research in Astronomy, Inc. under NASA contract NAS 5-26555.
You can also link directly to ULLYSES datasets using the DOI (Digital Object Identifier) here.