Chugai, Nikolai N.Chevalier, Roger A.Kirshner, Robert P.Challis, Peter M.2019-09-251997Chugai, Nikolai N., Roger A. Chevalier, Robert P. Kirshner, and Peter M. Challis. 1997. “Hubble Space TelescopeSpectrum of SN 1987A at an Age of 8 Years: Radioactive Luminescence of Cool Gas.” The Astrophysical Journal 483 (2): 925–40. https://doi.org/10.1086/304253.0004-637X1538-4357http://nrs.harvard.edu/urn-3:HUL.InstRepos:41399772en-USHubble Space Telescope Spectrum of SN 1987A at an Age of 8 Years: Radioactive Luminescence of Cool GasJournal Article2019-09-2510.1086/304253