script for important intellectual content: Brouda, Green, and Kimball. Statistical analysis: Brouda and Kimball. Obtained funding: Green. Administrative, technical, and material support: Alora-Palli and Brouda. Study supervision: Green and Kimball. Financial Disclosure: Drs Alora-Palli and Kimball are investigators for, and Dr Kimball served as a consultant to, NeoStrata Company Inc at the time...

This new UV study of the ex-nova HR Del is based on all of the data obtained with the International Ultraviolet Explorer (IUE) satellite, and includes the important series of spectra taken in 1988 and 1992 that have not been analyzed so far. This has allowed us to make a detailed study of both the long-timescale and the short-timescale UV variations, after the return of the nova, around 1981-19...